Abstract: A hybrid active array approach can combine aspects of a passive and active array architecture with transmitter, high power, and cooling components positioned in one location, e.g., below a ship deck, apart from a radiating location. Waveguides or signal transmission lines can convey a transmit signal from the transmitter to the radiating location, e.g., to a beamforming network (BFN), hybrid transmit/receive modules (HTRM), and a plurality of antenna elements. The exemplary BFN can set an amplitude distribution of an antenna aperture associated with the BFN, HTRMs, and plurality of antenna elements to control both transmit and receive sidelobes where low or reduced sidelobes on transmit reduces radiation outside of the main beam further reducing signal returns in one or more sidelobes sections of the antenna elements. In a receive mode, a reverse can occur and additional beamformers can be utilized for beamforming the receive beams.

Abstract: A hybrid active array approach can combine aspects of a passive and active array architecture with transmitter, high power, and cooling components positioned in one location, e.g., below a ship deck, apart from a radiating location. Waveguides or signal transmission lines can convey a transmit signal from the transmitter to the radiating location, e.g., to a beamforming network (BFN), hybrid transmit/receive modules (HTRM), and a plurality of antenna elements. The exemplary BFN can set an amplitude distribution of an antenna aperture associated with the BFN, HTRMs, and plurality of antenna elements to control both transmit and receive sidelobes where low or reduced sidelobes on transmit reduces radiation outside of the main beam further reducing signal returns in one or more sidelobes sections of the antenna elements. In a receive mode, a reverse can occur and additional beamformers can be utilized for beamforming the receive beams.