Mutual coupling compensation for a compact array in direction finding

Abstract

Multiport antenna arrays are more and more widely used in wireless communication systems.The strong mutual coupling effect between the elements of compact arrays may cause significant system performance degradation.Recently, a method using receiving mutual impedances has been proposed for mutual coupling compensation.In this paper, a compact monopole array is constructed and used in direction finding.For comparison, experiments are conducted with mutual coupling compensated by using the conventional mutual impedances and the receiving mutual impedances, respectively.The measured results show that the mutual coupling effect can be effectively removed using the receiving mutual impedances and the performance of direction finding can be greatly improved.