Impedance Optimization for Enhanced Beamforming of Coupled Lossy Antenna Arrays

In this paper, we investigate the impedance matching problem for realistic arrays of lossy and mutually coupled antennas, aiming to enhance the beamforming performance of the system. We develop a novel method to optimize the characteristic and load impedances in the transmit circuit that drives the antenna array. Numerical results are provided to show that the developed method has a faster convergence speed with considerably lower computational complexities than an existing impedance optimization method, while it can achieve almost the same favorable performance as the latter.