A 2-D Signal Processing Model to Predict the Effect of Mutual Coupling on Array Factor

作者：Kota John^*; Madanayake Arjuna; Belostotski Leonid; Wijenayake Chamith; Bruton Len T

来源：IEEE Antennas and Wireless Propagation Letters, 2013, 12: 1264-1267.

DOI：10.1109/LAWP.2013.2282272

• Antenna arrays
• beamforming
• mutual coupling

semi-analytical method for modeling the effects of electromagnetic mutual coupling in uniform linear array (ULA) of antennas is proposed. The coupling is described as a two-dimensional (2-D) spatiotemporal transfer function derived from S-parameter measurements. The proposed 2-D transfer function enables prediction of the distortions in array factor due to coupling and thereby enables the potential design of coupling-compensation algorithms. The method is verified with simulations in the 1.5-2.0-GHz range on both an N = 7-element ULA using CST Microwave Studio using 50-Omega terminations and a N = 3-element ULA in FEKO but with non-50 W impedance obtained from measurements of a CMOS low noise amplifier (LNA). Coupling effect on array factor of delay-sum-type beamformer was examined. The proposed model atches within an error of 4%-12% and 4%-10% with respect to the results from two full-wave electromagnetic simulators CST Microwave Studio and FEKO respectively in the frequency range 1.75-2 GHz.

• 出版日期2013