%0 Journal Article %T A Low-Profile and High-Gain Frequency Beam Steering Subterahertz Antenna Enabled by Silicon Micromachining %+ Royal Institute of Technology [Stockholm] (KTH ) %+ Institut d'Électronique et des Technologies du numéRique (IETR) %A Gomez-Torrent, Adrian %A Garcia-Vigueras, Maria %A Le Coq, Laurent %A Mahmoud, Adham %A Ettorre, Mauro %A Sauleau, Ronan %A Oberhammer, Joachim %Z 616846, H2020 European Research Council %Z SE13-007, Stiftelsen för Strategisk Forskning %Z European Regional Development Fund %Z French Region of Brittany, Ministry of Higher Education and Research, Rennes Métropole and Conseil Départemental 35, through the CPER Project SOPHIE/STIC & Ondes %< avec comité de lecture %@ 0018-926X %J IEEE Transactions on Antennas and Propagation %I Institute of Electrical and Electronics Engineers %V 68 %N 2 %P 672-682 %8 2020-02 %D 2020 %R 10.1109/TAP.2019.2943328 %K submillimeter- wave antennas %K quasi-optics %K terahertz radiation %K silicon on insulator %K Index Terms-beam steering %K leaky-wave antennas %K silicon micromachining %Z Engineering Sciences [physics]/Electronics %Z Engineering Sciences [physics]/ElectromagnetismJournal articles %X A very low-profile sub-THz high-gain frequency beam steering antenna, enabled by silicon micromachining, is reported for the first time in this paper. The operation bandwidth of the antenna spans from 220 to 300 GHz providing a simulated field of view of 56°. The design is based on a dielectric filled PPW leaky-wave antenna fed by a pillbox. The pillbox, a two-level PPW structure, has an integrated parabolic reflector to generate a planar wave front. The device is enabled by two extreme aspect ratio, 16 x 16 mm large perforated membranes, which are only 30 μm thick, that provide the coupling between the two PPWs and form the LWA. The micromachined low-loss PPW structure results in a measured average radiation efficiency of -1 dB and a maximum gain of 28.5 dBi with an input reflection coefficient below -10 dB. The overall frequency beam steering frontend is extremely compact (24 x 24 x 0.9 mm) and can be directly mounted on a standard WM-864 waveguide flange. The design and fabrication challenges of such high performance antenna in the sub-THz frequency range are described and the measurement results of two fabricated prototypes are reported and discussed. %G English %2 https://univ-rennes.hal.science/hal-02492879/document %2 https://univ-rennes.hal.science/hal-02492879/file/Gomez-Torrent%20et%20al-2019-A%20Low-Profile%20and%20High-Gain%20Frequency%20Beam%20Steering%20sub-THz%20Antenna%20Enabled%20by.pdf %L hal-02492879 %U https://univ-rennes.hal.science/hal-02492879 %~ UNIV-NANTES %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ IETR %~ STATS-UR1 %~ CENTRALESUPELEC %~ UR1-HAL %~ UR1-MATH-STIC %~ UR1-UFR-ISTIC %~ IETR-BEAMS %~ IETR-ADH %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ TEST-HALCNRS %~ UR1-MATH-NUM %~ IETR-SUMIT %~ IETR-SURFWAVE %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022