Active 30 GHz antenna array for digital beamforming and polarization multiplexing

An active 30 GHz transmit antenna array featuring digital beamforming (DBF) and polarization multiplexing is reported. The array elements rely on open substrate-integrated waveguides, as reported previously. The paper discusses the miniaturization and optimization of these radiators. Furthermore, a concept for the integration of the active components is proposed, realized, and tested on a scaled antenna version. Simulation as well as measurement data is presented and discussed.