%0 Journal Article %T A Broadband Low-Profile Circularly Polarized Radial Line Slot Antenna %+ Thales Research and Technology [Palaiseau] %+ Laboratoire Génie électrique et électronique de Paris (GeePs) %+ Institut d'Électronique et des Technologies du numéRique (IETR) %+ Department of Information Engineering [Sienne] (DII) %A Bertrand, Matthieu %A Ettorre, Mauro %A Valerio, Guido %A Albani, Matteo %A Casaletti, M. %Z 10.13039/501100001665-Direction Générale de l’Armement (DGA) through the Agence Nationale de la Recherche (ANR) Accompagnement Spécifique des travaux de Recherches et d’Innovation Défense (ASTRID) Fast Hybrid Electromagnetic Modeling for the analysis of highly-integrated complex 3D substrate integrated waveguide antenna front-ends (Fast-HEM-3DSIW) (Grant Number: ANR-16-ASTR-0001) %< avec comité de lecture %@ 0018-926X %J IEEE Transactions on Antennas and Propagation %I Institute of Electrical and Electronics Engineers %V 71 %N 1 %P 140 - 150 %8 2023-01 %D 2023 %R 10.1109/tap.2022.3218761 %K Radial Slot Line Antenna (RLSA) %K leaky-wave antenna %K pillbox %K optimization %Z Engineering Sciences [physics]Journal articles %X This paper presents a circularly polarized Corporate-Fed Radial-Line Slot Antenna (CF-RLSA) operating in Ka-band and realized in low-cost, low-profile printed circuit board (PCB) technology. The radiating aperture is fed by a corporate feed network based on a broadband pillbox-like circular transition. The proposed feeding system results in a 67% gain bandwidth improvement compared to classical center-fed RLSA designs. Pattern stability versus frequency is also achieved. The bandwidth improvement provided by the corporate-feed topology is analytically derived for the general case of circular apertures with uniform amplitude illumination. This predicted improvement is confirmed by measurements. The prototype is optimized using a dedicated numerical tool, then fabricated and characterized. A good agreement is obtained between simulated and measured gain bandwidths, with a demonstrated relative bandwidth of 6.9% at 29 GHz for a maximum gain of 35.5 dBi and a 260 mm diameter for the radiating aperture. %G English %2 https://univ-rennes.hal.science/hal-03956212/document %2 https://univ-rennes.hal.science/hal-03956212/file/Bertrand%20et%20al-2022-A%20Broadband%20Low-Profile%20Circularly%20Polarized%20Radial%20Line%20Slot%20Antenna.pdf %L hal-03956212 %U https://univ-rennes.hal.science/hal-03956212 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ IETR %~ STATS-UR1 %~ CENTRALESUPELEC %~ GEEPS %~ UR1-HAL %~ UR1-MATH-STIC %~ UNIV-PARIS-SACLAY %~ UR1-UFR-ISTIC %~ IETR-BEAMS %~ IETR-ADH %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ SORBONNE-UNIVERSITE %~ SORBONNE-UNIV %~ SU-SCIENCES %~ UNIVERSITE-PARIS-SACLAY %~ GEEPS-TRAVAIL2 %~ SU-TI %~ ANR %~ UR1-MATH-NUM %~ GS-PHYSIQUE %~ ALLIANCE-SU %~ IETR-SUMIT %~ NANTES-UNIVERSITE %~ NANTES-UNIV