Characterization of a Low-Profile Quad-Feed Based Transmitarray Antenna at V-Band

In this paper, the design and experimental characterization of a low-profile transmitarray operating at V-band (57 - 66 GHz) have been presented. A quad-feed based architecture has been selected to reduce the antenna profile maintaining high gain and wideband behaviors, as in the case of single-feed transmitarrays. A 1296-element transmitarray, with an aperture of 90×90 mm
²
and a total thickness of 44 mm, has been optimized, fabricated, and experimentally characterized. A maximum gain of 32.6 dBi, corresponding to an aperture efficiency of 39.5%, has been successfully demonstrated.