A 2-D Signal Processing Model to Predict the Effect of Mutual Coupling on Array Factor
Antennas and Wireless Propagation Letters, IEEE（2013）
摘要
A semi-analytical method for modeling the effects of electromagnetic mutual coupling in uniform linear array (ULA) of N 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- Ω terminations and a N=3-element ULA in FEKO but with non-50 Ω 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 matches 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.
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关键词
cmos analogue integrated circuits,s-parameters,linear antenna arrays,low noise amplifiers,signal processing,2d signal processing model,2d spatiotemporal transfer function,cmos low noise amplifier,cst microwave studio,feko,lna,s-parameter measurements,ula,antennas,array factor,coupling effect,coupling-compensation algorithms,delay-sum-type beamformer,electromagnetic mutual coupling,frequency 1.5 ghz to 2.0 hz,full-wave electromagnetic simulators,semianalytical method,two-dimensional spatiotemporal transfer function,uniform linear array,antenna arrays,beamforming,mutual coupling,transfer functions,computational modeling,scattering parameters,predictive models,s parameters
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