Beamforming of Circular Patch Antenna Array Based on Space Projection Method

Antenna array Beamforming has attracted much attention because it can greatly increase the anti-interference ability at the receiving end of the communication system. This paper presents the beamforming method of the circular array composed of inset fed microstrip patch antenna(IFMPA). First, IFMPA is optimized by the particle swarm optimization(PSO) algorithm to make it suitable for array formation. Then, the null-space projection(SP) method is proposed to solve the feed weight of the array. Finally, the effectiveness of the above method is verified by bringing the weights into the CST software to obtain the far-field pattern and SIR.