%0 Conference Paper %F Oral %T Recent Achievements on Passive and Beam Steering Transmitarrays at Millimeter Waves %+ Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI) %+ Institut d'Électronique et des Technologies du numéRique (IETR) %A Koutsos, Orestis %A Madi, Reda %A Foglia Manzillo, Francesco %A Smierzchalski, Maciek %A Clemente, Antonio %A Sauleau, Ronan %< avec comité de lecture %B 2021 International Symposium on Antennas and Propgation %C Taipei, Taiwan %8 2021 %D 2021 %K Transmitarrays %K beam-forming %K Ka-band %K 300 GHz %K polarization agility %K electronically scanned antenna. I %Z Engineering Sciences [physics]/ElectromagnetismConference papers %X This paper reports an overview of recent advancements on transmitarray antennas at CEA-Leti in collaboration with IETR. Two fixed-beam and an electronicallysteerable prototypes are presented. The first fixed-beam transmitarray radiates orthogonal linear polarizations at K/Kaband. The second achieves wideband high-gain performance at 300 GHz using low-cost vialess technology. The reconfigurable transmitarray leverages on an efficient and low-power solution to attain beam steering and switchable circular polarization at Ka-band. Excellent scanning capabilities in a field of view of ±60°, with low axial ratio are experimentally demonstrated. %G English %2 https://hal.science/hal-03515163/document %2 https://hal.science/hal-03515163/file/ISAP_v3.pdf %L hal-03515163 %U https://hal.science/hal-03515163 %~ CEA %~ UNIV-NANTES %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ IETR %~ CENTRALESUPELEC %~ DRT %~ UR1-HAL %~ UR1-MATH-STIC %~ UR1-UFR-ISTIC %~ IETR-BEAMS %~ IETR-ADH %~ LETI %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ CEA-GRE %~ UR1-MATH-NUM %~ IETR-SUMIT %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022