Simultaneous transmit and receive based on phase-only digital beamforming

Traditional simultaneous transmit and receive mainly focuses on element-level antenna configurations in wireless communication. This paper takes large antenna array as research object, focusing on achieving high transmit-receive isolation in aperture-level simultaneous transmit and receive. This paper applies phase-only digital beamforming in uniform linear array, and constructs nonlinear equations by combining coupling constraints and phase-only constraints, then the solution of the equations can be obtained as the weighted vector of the transmit array. The method provides at least 40 dB isolation improvement without affecting the performance of target detection, which has practical significance in engineering.