%0 Journal Article %T A new equivalent circuit scheme for grounded back-to-back GCPW-MS-GCPW transitions fabricated on a thin low-k substrate %+ Institut d'Électronique et des Technologies du numéRique (IETR) %+ Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN) %+ Optoélectronique - IEMN (OPTO - IEMN) %+ Plateforme de Caractérisation Multi-Physiques - IEMN (PCMP - IEMN) %A Dugué, Pierre-Vincent %A El Gibari, Mohammed %A Halbwax, Mathieu %A Ginestar, Stephane %A Avramovic, Vanessa %A Vilcot, Jean-Pierre %A Li, Hong Wu %< avec comité de lecture %@ 1937-6480 %J Progress In Electromagnetics Research Letters %I EMW Publishing %V 95 %P 33-42 %8 2021 %D 2021 %R 10.2528/PIERL20093003 %Z Engineering Sciences [physics] %Z Engineering Sciences [physics]/OtherJournal articles %X We hereby present a new equivalent circuit model including both lumped and distributed elements for GCPW-MS transitions (GCPW for Grounded CoplanarWaveguide and MS for Microstrip). In order to validate the modelling results, such transitions have been fabricated on a 20 μm-thick BCB (Benzocyclobutene resin) substrate using grounding pads including via-holes of different diameters. The study focused on the impact of the via-hole diameter on the performance of the transition and more specifically on its bandwidth. The transitions were made using a simple technological process based on photosensitive polymer. ADS simulation data of the new equivalent circuit model were in very good agreement with measured S-parameters. Both theoretical and experimental results have shown that the bandwidth of such a transition can reach up to 100 GHz using via-holes of 900 μm diameter. %G English %Z Renatech Network %Z PCMP CHOP %2 https://hal.science/hal-03054270/document %2 https://hal.science/hal-03054270/file/Dugue_2021_05.20093003.pdf %L hal-03054270 %U https://hal.science/hal-03054270 %~ UNIV-NANTES %~ UNIV-RENNES1 %~ CNRS %~ UNIV-VALENCIENNES %~ INSA-RENNES %~ IEMN %~ IETR %~ CENTRALESUPELEC %~ UR1-HAL %~ UR1-MATH-STIC %~ UR1-UFR-ISTIC %~ IETR-CUTE %~ IETR-ADH %~ TEST-UR-CSS %~ UNIV-RENNES %~ UNIV-LILLE %~ INSA-GROUPE %~ TEST-HALCNRS %~ ANR %~ UR1-MATH-NUM %~ IETR-SUMIT %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022 %~ UNIV-CATHOLILLE %~ JUNIA %~ IETR-NANTES