{"id":6,"date":"2018-11-27T09:17:28","date_gmt":"2018-11-27T08:17:28","guid":{"rendered":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/services\/"},"modified":"2025-05-16T13:13:38","modified_gmt":"2025-05-16T11:13:38","slug":"research_topics","status":"publish","type":"page","link":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/research_topics\/","title":{"rendered":"Research Topics"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6\" class=\"elementor elementor-6\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-33a79095 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"33a79095\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-b7194dc\" data-id=\"b7194dc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-628b664 elementor-widget elementor-widget-image\" data-id=\"628b664\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"568\" height=\"443\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/UCLouvain.jpg\" class=\"attachment-large size-large wp-image-2633\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/UCLouvain.jpg 568w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/UCLouvain-300x234.jpg 300w\" sizes=\"(max-width: 568px) 100vw, 568px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-3706530d\" data-id=\"3706530d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-537de1f elementor-widget elementor-widget-heading\" data-id=\"537de1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Research Topics<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-4788e5dc\" data-id=\"4788e5dc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2588c90 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2588c90\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8825c0f\" data-id=\"8825c0f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b528f76 elementor-widget elementor-widget-spacer\" data-id=\"b528f76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d6c60ea elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d6c60ea\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-f20a204\" data-id=\"f20a204\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bfd172b elementor-widget elementor-widget-image\" data-id=\"bfd172b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-1024x768.jpg\" class=\"attachment-large size-large wp-image-993\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-1024x768.jpg 1024w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-300x225.jpg 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-768x576.jpg 768w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-1536x1152.jpg 1536w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20181123_213446-2048x1536.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-135a05c elementor-widget elementor-widget-text-editor\" data-id=\"135a05c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\"><strong>Engineered Semiconductor RF Substrates<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-390fdff elementor-widget elementor-widget-text-editor\" data-id=\"390fdff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Silicon wafers are extremely mature, and come in diameters as large as 450 mm. For these reasons, the throughput and price of Si-based chips are highly attractive to the RF market players.<\/p><p>However, without careful considerations, silicon&#8217;s electrical properties can be very lossy as a substrate handle material for RF and mm-wave applications. Substrate linearity is also a strong concern, as passive devices and interconnects on such substrates become sources of signal distortion.<\/p><p>UCLouvain&#8217;s research group has been pioneering in the field of silicon-based RF substrates since we developed the widely adopted <strong><em>Trap-Rich<\/em><\/strong> SOI substrates over 15 years ago in 2005 <span style=\"color: #0000ff;\"><span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/1522461\">[DL05<\/a><\/span>]<\/span>.<\/p><p>Since then, we have proposed several other <span style=\"text-decoration: underline;\">silicon-enhancement<\/span> techniques for RF, including <em><strong>Smart PN-junctions<\/strong><\/em> <span style=\"color: #0000ff;\">[<a href=\"https:\/\/ieeexplore.ieee.org\/document\/8676307\"><span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\">MR19<\/span><\/span><\/a>]<\/span> and <em><strong>Locallized Post-Process Porozification<\/strong><\/em> <span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0038110119307221?via%3Dihub\">GS19<\/a><\/span>]<\/span>.<\/p><p>Furthermore, UCLouvain is working on substrate modelling and optimization in the context of <em><strong>GaN-on-Si<\/strong><\/em>.<\/p><p>More information on our developed RF substrate solutions, their characterization, modelling, and applications can be found on our dedicated <a href=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/infrastructures\/\"><strong><span style=\"color: #0aaaaa;\">Infrastructure &amp; Expertise webpage<\/span><\/strong><\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-bce40d9\" data-id=\"bce40d9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cce00ea elementor-widget elementor-widget-image\" data-id=\"cce00ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/elementor\/thumbs\/dddd-oqts1olmg8cbb7y7axh18bhwhc6yjbvvmrh59cdga8.jpg\" title=\"dddd\" alt=\"dddd\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-419d8f1 elementor-widget elementor-widget-text-editor\" data-id=\"419d8f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\">Advanced SOI Devices<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29fb4a4 elementor-widget elementor-widget-text-editor\" data-id=\"29fb4a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Our research group has been working on the development of SOI devices since its beginning, with a particular focus on device parameter extraction <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/4117322\"><span style=\"text-decoration: underline;\">DL07<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/4160026\"><span style=\"text-decoration: underline;\">VK07<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9440125\"><span style=\"text-decoration: underline;\">LN21b<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9349757\"><span style=\"text-decoration: underline;\">VK21<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9373427\"><span style=\"text-decoration: underline;\">AM21<\/span><\/a>, <span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9753666\">MV22<\/a><\/span>]<\/span>, RF perfomance <span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/0268-1242\/20\/5\/025\">DL05b<\/a><\/span>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/7962569\"><span style=\"text-decoration: underline;\">BKE17<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9117028\"><span style=\"text-decoration: underline;\">LN20<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9437955\"><span style=\"text-decoration: underline;\">MV21<\/span><\/a>, <a href=\"https:\/\/ieeexplore.ieee.org\/document\/9631835\"><span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\">MR21s<\/span><\/span><\/a>]<\/span>,\u00a0 self-heating characterization <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/6515360\"><span style=\"text-decoration: underline;\">SM13<\/span><\/a>, <span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0038110115002506?via%3Dihub\">SM16<\/a><\/span>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9395481\"><span style=\"text-decoration: underline;\">LN21h<\/span><\/a>]<\/span>, and performance over a wide temperature range <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9720052\"><span style=\"text-decoration: underline;\">AH22t<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10219437\"><span style=\"text-decoration: underline;\">AH23t<\/span><\/a>]<\/span>.<\/p><p>With gate length shrinking, the extrinsic elements dominate the RF performance of advanced FETs, extracting the complete small-signal parameters from measurements as well as\/coupled with TCAD simulations becomes essential to identify the (process-related) limitations and investigate new solutions.<\/p><p>Self-heating is pronounced in SOI devices due to the low thermal conductivity of the buried oxide. Its evaluation with the RF technique is mandatory as the device thermal time constant decreases with device size reduction <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0038110115002506?via%3Dihub\"><span style=\"text-decoration: underline;\">SM16<\/span><\/a>]<\/span>.<\/p><p>For ultra-thin body and buried oxide (UTBB) devices, the substrate impacts on the device&#8217;s behavior. Accurate extractions of the below-BOX network necessitates 4-port measurements and simulations. The substrate also adds parasitic effects to the device&#8217;s behavior over frequency, and such &#8220;frequency signatures&#8221; are often relied upon for the evaluation of self-heating effects. New techniques are developed in our group to unambiguously separate the contributions of both effects <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9395481\"><span style=\"text-decoration: underline;\">LN21h<\/span><\/a>]<\/span>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-accd332 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"accd332\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ec8b38e\" data-id=\"ec8b38e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-238cce3 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"238cce3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1013\" height=\"802\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/phys1.jpg\" class=\"attachment-full size-full wp-image-2283\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/phys1.jpg 1013w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/phys1-300x238.jpg 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/phys1-768x608.jpg 768w\" sizes=\"(max-width: 1013px) 100vw, 1013px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe9f5a3 elementor-widget elementor-widget-spacer\" data-id=\"fe9f5a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39a7151 elementor-widget elementor-widget-text-editor\" data-id=\"39a7151\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\">Physical Modelling of Semiconductor Non-Linearities Inducing Signal Distortion at RF<br><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e90a201 elementor-widget elementor-widget-text-editor\" data-id=\"e90a201\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Semiconductor substrates are non-linear by nature, as their electrical properties depend on the applied electric field. It turns out that silicon substrates contribute significantly to the non-linearity of RF-ICs<span style=\"color: #0000ff;\"> [<\/span><span style=\"text-decoration: underline; color: #0000ff;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/www.soitec.com\/media\/files\/soitec_whitepaper_rfesi_product_characterization_300mm_v2.pdf\">1<\/a><\/span><span style=\"color: #0000ff;\">, <span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/8290836\">BKE18<\/a><\/span>]<\/span>.<\/p><p>The non-linearity originates from the movement of free carriers in the substrate in response to the RF signal, that modulates the substrate impedance through time.<\/p><p>Modelling these effects is challenging at RF frequencies, as carrier densities and trap occupation cannot vary instantaneously, as they ar governed by physical time constants that are in general larger than the RF time period.<\/p><p>These carrier and trap dynamics have been extensively modeled and characterized in our lab <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9494714\"><span style=\"text-decoration: underline;\">MR21I<\/span><\/a>, <span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9494724\">MR21II<\/a><\/span>]<span style=\"color: #000000;\">, enabling the development of a novel physical simulation approach of substrate-induced distortion.<\/span><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-9d539b0\" data-id=\"9d539b0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a9f478a elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"a9f478a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"512\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly.png\" class=\"attachment-full size-full wp-image-20193\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly.png 512w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-300x300.png 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-150x150.png 150w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-270x270.png 270w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-192x192.png 192w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-180x180.png 180w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/12\/cropped-Logo_RFSOI_HQ_chiponly-32x32.png 32w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f97c3c7 elementor-widget elementor-widget-spacer\" data-id=\"f97c3c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-caabd1a elementor-widget elementor-widget-text-editor\" data-id=\"caabd1a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\">Cryogenic Cold Stuff<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d2dc78 elementor-widget elementor-widget-text-editor\" data-id=\"1d2dc78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Things get colder the less they are warm.<\/p><ul><li><strong>For these reasons, it&#8217;s cool to measure at cryogenic temperatures<\/strong><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16e553e elementor-widget elementor-widget-spacer\" data-id=\"16e553e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-c61a89e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c61a89e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-6833e95\" data-id=\"6833e95\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-496cc46 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"496cc46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1018\" height=\"492\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/04\/design2.png\" class=\"attachment-full size-full wp-image-19643\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/04\/design2.png 1018w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/04\/design2-300x145.png 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2024\/04\/design2-768x371.png 768w\" sizes=\"(max-width: 1018px) 100vw, 1018px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a47011 elementor-widget elementor-widget-spacer\" data-id=\"4a47011\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-58fc3ab elementor-widget elementor-widget-text-editor\" data-id=\"58fc3ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\">RF &amp; mm-wave IC design<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0f95d7 elementor-widget elementor-widget-text-editor\" data-id=\"e0f95d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>UCLouvain&#8217;s team develops its own IC demonstrator circuits. The focus is placed on the main key components of Front-End-Modules (FEM) in telecommunication circuits, namely the <strong>Switch<\/strong>, the Low-Noise Amplifier (<strong>LNA<\/strong>), the Power Amplifier (<strong>PA<\/strong>), the <strong>Mixer<\/strong>, and the voltage-controlled oscillator (<strong>VCO<\/strong>)<strong>. \u00a0 \u00a0 \u00a0 <\/strong>Notably, UCLouvain&#8217;s team has developed:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f2f8b5 elementor-widget elementor-widget-text-editor\" data-id=\"8f2f8b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>RF switches<\/strong> implemented on different types of substrates<ul><li>Designs on High-Resistvity and Trap-Rich using 180 nm PD-SOI in order to extract the contribution of substrate non-linearity on the overall SPDT module&#8217;s linearity <span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/8290836\">BKE18<\/a><\/span>]<\/span>.<\/li><li>Designs on Standard-Resistivity, High-Resistivity (HR) and PN-passivated HR using 28 nm FD-SOI to evaluate substrate-induced coupling and RF loss [<span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10732828\"><span style=\"text-decoration: underline;\">MN24<\/span><\/a><\/span>].<\/li><\/ul><\/li><li><strong>mm-wave switches<\/strong> in FD-SOI technology<ul><li style=\"list-style-type: none;\"><ul><li>Evaluation of the back-gate impact on switch FoMs <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/9218317\"><span style=\"text-decoration: underline;\">[MR20]<\/span><\/a><span style=\"color: #000000;\">. <\/span><\/span><\/li><li><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">Study of substrate-related parasitics and their impact on mm-wave switch performance<\/span> <a href=\"https:\/\/ieeexplore.ieee.org\/document\/9631835\"><span style=\"color: #ff0000;\"><span style=\"text-decoration: underline; color: #0000ff;\">[MR21s<\/span><\/span><\/a>]<\/span>, culminating in a wideband DC-120 GHz SPDT design with low loss <span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f9863217&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989167904%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=felirs1yyjttwuvwk8wze44hxpptk%2fikftlvcibx2dg%3d&amp;reserved=0\" href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F9863217&amp;data=05%7C02%7Cmartin.rack%40uclouvain.be%7C09e776aee297431b761c08dc63755f45%7C7ab090d4fa2e4ecfbc7c4127b4d582ec%7C1%7C0%7C638494602989167904%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=felIRs1YyJTTwuvwK8wze44hXpPTk%2FIKftLVCIbx2Dg%3D&amp;reserved=0\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link SwitchUWB\"><span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\">[MR22s]<\/span><\/span><\/a><\/span>.<\/li><li><span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\"><span style=\"color: #000000;\">Designs of 60 GHz switches in the travelling-wave topology <\/span><span style=\"color: #0000ff;\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" style=\"color: #0000ff;\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f10289107&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989161201%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=gkmnevoczou5wvcqrq2euieaw%2fdlegqvllj%2bsliastm%3d&amp;reserved=0\" href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F10289107&amp;data=05%7C02%7Cmartin.rack%40uclouvain.be%7C09e776aee297431b761c08dc63755f45%7C7ab090d4fa2e4ecfbc7c4127b4d582ec%7C1%7C0%7C638494602989161201%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=gkMnEVoCzou5WvCqrQ2eUIEAw%2FDlEGqVlLj%2BsLIAsTM%3D&amp;reserved=0\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link Switch60GHz\"><span style=\"text-decoration: underline;\">[QC23]<\/span><\/a><span style=\"color: #000000;\">.<\/span> <\/span><\/span><\/li><\/ul><\/li><\/ul><\/li><li><strong>mm-wave LNA<\/strong> designs in FD-SOI<ul><li style=\"list-style-type: none;\"><ul><li>Two-stage cascode LNA at 39 GHz <span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f9923552&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989135503%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=oidviyyzcqjf4povnpb0m%2bod8rumokvu2cdfyh3xztc%3d&amp;reserved=0\" href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F9923552&amp;data=05%7C02%7Cmartin.rack%40uclouvain.be%7C09e776aee297431b761c08dc63755f45%7C7ab090d4fa2e4ecfbc7c4127b4d582ec%7C1%7C0%7C638494602989135503%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=oIDViyyzcqJF4poVNPB0m%2BoD8RuMokVU2cDFYh3xzTc%3D&amp;reserved=0\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link LNA39GHz\"><span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\">[LN22L]<\/span><\/span><\/a><\/span>.<\/li><li>Three-stage cascode LNA at 60 GHz [<span style=\"color: #008080;\">MR24]<\/span>.<\/li><li><span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\">Four-stage differential LNA at 120 GHz <span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" style=\"color: #0000ff; text-decoration: underline;\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f10288898&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989147329%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=gxxbdtvt1sajzrjn%2blcbik9p24apqa858g91zvwlwq0%3d&amp;reserved=0\" href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F10288898&amp;data=05%7C02%7Cmartin.rack%40uclouvain.be%7C09e776aee297431b761c08dc63755f45%7C7ab090d4fa2e4ecfbc7c4127b4d582ec%7C1%7C0%7C638494602989147329%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=gXXbDtvT1SajzRjn%2BLcBik9p24aPQA858G91zVwlwq0%3D&amp;reserved=0\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link LNA120GHz\">[MR23]<\/a><\/span><\/span>.<\/span><\/li><\/ul><\/li><\/ul><\/li><li><strong>mm-wave mixer <\/strong>designs<ul><li style=\"list-style-type: none;\"><ul><li>Novel mixer topology at 28 GHz employing FD-SOI FETs as dual-gate devices, driving the back-gate nodes with the LO signal <span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f9923503&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989154456%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=o8lygx1xo9yqn25naxwz5n3jixrohvudkdxptlkbuhe%3d&amp;reserved=0\" href=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F9923503&amp;data=05%7C02%7Cmartin.rack%40uclouvain.be%7C09e776aee297431b761c08dc63755f45%7C7ab090d4fa2e4ecfbc7c4127b4d582ec%7C1%7C0%7C638494602989154456%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=O8lYgX1XO9yQN25NaXWz5n3jIXRohvUdKdXPTlKbuHE%3D&amp;reserved=0\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link Mixer28GHz\"><span style=\"text-decoration: underline; color: #0000ff;\">[MN22]<\/span><\/a><\/span>.<\/li><\/ul><\/li><\/ul><\/li><li><strong>mm-wave PA <\/strong>designs<ul><li>Wideband EVM measurements at 28\/39 GHz <span class=\"ui-provider a b c d e f g h i j k l m n o p q r s t u v w x y z ab ac ae af ag ah ai aj ak\" dir=\"ltr\"><a class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/eur03.safelinks.protection.outlook.com\/?url=https%3a%2f%2fieeexplore.ieee.org%2fdocument%2f9923503&amp;data=05%7c02%7cmartin.rack%40uclouvain.be%7c09e776aee297431b761c08dc63755f45%7c7ab090d4fa2e4ecfbc7c4127b4d582ec%7c1%7c0%7c638494602989154456%7cunknown%7ctwfpbgzsb3d8eyjwijoimc4wljawmdailcjqijoiv2lumziilcjbtii6ik1hawwilcjxvci6mn0%3d%7c0%7c%7c%7c&amp;sdata=o8lygx1xo9yqn25naxwz5n3jixrohvudkdxptlkbuhe%3d&amp;reserved=0\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10765124\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link Mixer28GHz\"><span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\">LN24<\/span>]<\/span><\/a><\/span>.<\/li><\/ul><\/li><li><strong>Phase-shifter<\/strong> designs<ul><li>True-time-delay designs covering 10 to 30 GHz [MR25].<\/li><\/ul><\/li><li><strong>VCO<\/strong> designs<ul><li>d<\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f0a785f elementor-widget elementor-widget-spacer\" data-id=\"f0a785f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-11e8a06 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"11e8a06\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-11233be\" data-id=\"11233be\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7a32308 elementor-widget elementor-widget-image\" data-id=\"7a32308\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"907\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-1024x907.jpg\" class=\"attachment-large size-large wp-image-2263\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-1024x907.jpg 1024w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-300x266.jpg 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-768x680.jpg 768w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-1536x1360.jpg 1536w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2020\/06\/IMG_20200528_1333-2048x1814.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96a9de5 elementor-widget elementor-widget-text-editor\" data-id=\"96a9de5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\">Wideband On-Wafer Characterization<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e91d6a6 elementor-widget elementor-widget-text-editor\" data-id=\"e91d6a6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>With the <a href=\"https:\/\/sites.uclouvain.be\/welcome\/index.php?msg=ok\"><strong><span style=\"color: #f02800;\">Welcome<\/span><\/strong><\/a> platform at our disposal, our group has extensively characterized numerous passives, active devices and circuits. This platform allows us to perform on-wafer S-parameter measurements from 900 Hz to 330 GHz in a single sweep. Furthermore, large-signal measurements benches (HD, P1dB, IIP3, etc.) are also available, with high-power inputs (PA setups enabling up to 30 dBm at DUT input) at key frequencies between 50 MHz and 28 GHz with a receiver noise floor below -120 dBm. All on-wafer measurement setups can be combined with thermal probe-stations, whose temperatures are controllable over a wide range: from 4.2 K to 300\u00b0 C.<\/p><p>Implementation of advanced calibration techniques are essential to guarantee reliable measurements in the millimeter-wave frequency range. Commercial calibration tools (WinCalXE, Qalibria) are used to perform the calibration on an Impedance Standard Substrate with common calibration algorithms. For some very sensitive measurements (FETs above 100 GHz), a second calibration performed on the same wafer as the dut is required <span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10278758\">LN23z<\/a><\/span>, <span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10146381\">LN23p<\/a><\/span>]<\/span>, using most advanced calibration techniques (LRM+, mTRL). Finally, de-embedding is always performed to move the reference plane as close to the DUT as possible.<\/p><p>More information on our test-benches, equipment, and their applications can be found on our dedicated<span style=\"color: #0aaaa8;\"> <a style=\"color: #0aaaa8;\" href=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/infrastructures\/\"><strong>Infrastructure &amp; Expertise webpage<\/strong><\/a><\/span>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-d752a89\" data-id=\"d752a89\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-288bb8f elementor-widget elementor-widget-image\" data-id=\"288bb8f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"951\" height=\"827\" src=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2021\/01\/THz_Si.png\" class=\"attachment-large size-large wp-image-5063\" alt=\"\" srcset=\"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2021\/01\/THz_Si.png 951w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2021\/01\/THz_Si-300x261.png 300w, https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-content\/uploads\/2021\/01\/THz_Si-768x668.png 768w\" sizes=\"(max-width: 951px) 100vw, 951px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1402565 elementor-widget elementor-widget-text-editor\" data-id=\"1402565\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4 style=\"text-align: center;\"><strong>Micromachined Silicon Waveguides and Circuits for THz Applications<\/strong><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19f03a7 elementor-widget elementor-widget-text-editor\" data-id=\"19f03a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-size: 16px;\">Downscaling of CMOS technologies down to several tens of nanometers have led to the development of transistors able to operate at frequencies well above 100 GHz. At such frequencies metallic losses of on- and off-chip interconnects become significant, and it is anticipated that they will become severe performance limitation factors for systems operating above 200 GHz <span style=\"color: #0000ff;\">[<span style=\"text-decoration: underline;\"><a style=\"color: #0000ff; text-decoration: underline;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/10290173\">SM23<\/a><\/span>]<\/span>. An alternate approach to traditional planar metallized lines consisting of building waveguides in silicon is investigated by our group. UCLouvain\u2019s cleanroom <\/span><span style=\"color: #f02850;\"><a style=\"font-size: 16px; background-color: #ffffff; color: #f02850;\" href=\"https:\/\/sites.uclouvain.be\/winfab\/NEW_website\/login.html\"><strong>Winfab<\/strong><\/a><\/span><span style=\"font-size: 16px;\"> facilities\u00a0allow us to perform deep reactive ion etching of silicon trenches which are\u00a0used to fabricate waveguides of selected width and height.\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-GB\">One important aspect of the research (which started in 2021) focuses on designing optimum transitions between the WG TE10 mode and the rest of the circuitry. Low loss, compact, broadband and matched transitions are crucial for the success of such a technology.\u00a0<\/span><\/p><p class=\"MsoNormal\"><span lang=\"EN-GB\">A second aspect investigates the co-integration of WG technology with active semiconductor devices in order to build THz circuits with minimal losses. This approach should pave the way to THz circuits and systems with significantly reduced form factor, weight and fabrication cost compared to traditional metal-block packaging techniques, <span style=\"color: #0000ff;\">[<a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/5613727\"><span style=\"text-decoration: underline;\">DL10<\/span><\/a>, <a style=\"color: #0000ff;\" href=\"https:\/\/ieeexplore.ieee.org\/document\/5973493\"><span style=\"text-decoration: underline;\">DL11<\/span><\/a>]<\/span>.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Research Topics Engineered Semiconductor RF Substrates Silicon wafers are extremely mature, and come in diameters as large as 450 mm. For these reasons, the throughput and price of Si-based chips are highly attractive to the RF market players. However, without careful considerations, silicon&#8217;s electrical properties can be very lossy as a substrate handle material for [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"enabled","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-6","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/pages\/6","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/comments?post=6"}],"version-history":[{"count":65,"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/pages\/6\/revisions"}],"predecessor-version":[{"id":26413,"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/pages\/6\/revisions\/26413"}],"wp:attachment":[{"href":"https:\/\/sites.uclouvain.be\/RF-SOI-group\/wp-json\/wp\/v2\/media?parent=6"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}