%0 Conference Paper %F Oral %T Synthesis and characterization of a focused-beam transmitarray antenna at 300 GHz %+ 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 Foglia Manzillo, Francesco %A Koutsos, Orestis %A Fuchs, Benjamin %A Sauleau, Ronan %A Clemente, Antonio %< avec comité de lecture %B EuCAP 2022 %C Madrid, Spain %8 2022-03-28 %D 2022 %K array synthesis %K lens antennas %K convex optimization %K millimeter-wave antennas %K sub-THz antennas %Z Engineering Sciences [physics]Conference papers %X This paper presents the synthesis, design and characterization of a centrosymmetric transmitarray antenna operating at 300 GHz. A broadside pencil beam with reduced sidelobe levels is obtained by fixing the illumination (i.e. feed and focal distance) and using a phase-only array synthesis procedure. The optimal aperture phase distribution is determined by means of an iterative convex optimization algorithm using semidefinite relaxation. Based on this distribution, a 400-element transmitarray comprising eight different unit cells is designed at 300 GHz, fabricated using low-cost printed circuit board technology and characterized. The measured results provide a first experimental validation of the synthesis approach. %G English %2 https://hal-cea.archives-ouvertes.fr/cea-03637057/document %2 https://hal-cea.archives-ouvertes.fr/cea-03637057/file/EuCAP2022_TA300_synth_UP.pdf %L cea-03637057 %U https://hal-cea.archives-ouvertes.fr/cea-03637057 %~ CEA %~ 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 %~ ANR %~ UR1-MATH-NUM %~ IETR-SUMIT %~ NANTES-UNIVERSITE %~ NANTES-UNIV