%0 Journal Article %T Analytical Model and Study of Continuous Parallel Plate Waveguide Lens-like Multiple-Beam Antennas %+ Institut d'Électronique et des Technologies du numéRique (IETR) %+ Agence Spatiale Européenne = European Space Agency (ESA) %+ Thales Alenia Space [Toulouse] (TAS) %A Doucet, F. %A Fonseca, N.J.G. %A Girard, E. %A Legay, H. %A Sauleau, R. %Z European Space Agency %Z Thales Alenia Space, France, in the frame of ESA’s Networking/Partnering Initiative %< avec comité de lecture %@ 0018-926X %J IEEE Transactions on Antennas and Propagation %I Institute of Electrical and Electronics Engineers %V 66 %N 9 %P 4426-4436 %8 2018-09 %D 2018 %R 10.1109/TAP.2018.2846768 %K Beamformer %K constrained lens %K elliptical curved linear array %K geometrical optics (GO) %K multiple-beam antennas %K parallel plate waveguide (PPW) %K phase aberrations %K ray tracing %Z Engineering Sciences [physics]Journal articles %X An analytical model based on geometrical optics is proposed to design and analyze continuous parallel plate waveguide (PPW) lens-like antennas. The proposed design is based on a transversal PPW section working as a lens-like beamformer. By simplifying the propagation inside this transversal section, a bifocal constrained lens model is first defined; it provides a relevant starting point to design the proposed beamformer. A refined model based on ray tracing and with an enhanced performance prediction is achieved by accounting the wave propagation inside the transversal cavity. The numerical analysis of phase aberrations and radiation demonstrate the performance of the proposed beamformer. The results of the ray-Tracing model are in a very good agreement with the corresponding full-wave model, while providing a significant reduction in the computational effort, making the proposed model more suitable for advanced optimization processes. © 1963-2012 IEEE. %G English %L hal-01881031 %U https://hal-univ-rennes1.archives-ouvertes.fr/hal-01881031 %~ 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 %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022