Ka-band Transmitarray with Integrated High-Power Amplifiers for Limited-Scan Applications

This paper presents the design of a Ka-band active transmitarray consisting of radiating waveguide elements, a transition from waveguide to PCB, and commercial phase shifters and high-power amplifiers. A unit cell design is presented, which at a size of (0.7λ)2 allows for beamsteering without grating lobes up to around ±20° from broadside. The modeled performance of a 68-element array is presented, demonstrating the feasibility of a 81.6 dBm EIRP at 35 GHz from a 7 cm wide aperture.