Circularly Polarized Transmitarray Antennas at Ka-Band

F. Diaby (1) , A. Clemente (1) , K.T. Pham (2) , R. Sauleau (2) , L. Dussopt (1)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 IETR - Institut d'Électronique et des Technologies du numéRique

This letter presents the simulation, optimization, and demonstration of a collimated-beam transmitarray and a quad-beam transmitarray operating at Ka-band. Both transmitarrays are based on a 3 bit unit cell implementing both phase-shift and linear-to-circular polarization conversion functions. The collimated-beam transmitarray presents a measured gain of 33.8 dBi (corresponding to an aperture efficiency of 51.2%) and a 3 dB gain bandwidth larger than 15.9%. The quad-beam transmitarray phase distribution has been optimized by a genetic algorithm code coupled with an analytical tool. The array is designed to radiate four beams at θ0 = ± 25° in the horizontal and vertical planes at the frequency of optimization. © 2002-2011 IEEE.

Keywords: Array lens; discrete lens; Ka band; transmit array antenna

Domains: Engineering Sciences [physics]

F. Diaby, A. Clemente, K.T. Pham, R. Sauleau, L. Dussopt. Circularly Polarized Transmitarray Antennas at Ka-Band. IEEE Antennas and Wireless Propagation Letters, 2018, 17 (7), pp.1204-1208. ⟨10.1109/LAWP.2018.2839021⟩. ⟨hal-01874632⟩