Two-Element Compact Antenna Arrays using Decoupling Networks and Phase Shifters for Four-Branch Switching Diversity

A novel method of realizing four-branch switching diversity by a compact two-element antenna array is proposed. The proposed antenna consists of a two-element antenna array, a decoupling network composed of four susceptances, and two phase shifters. This antenna has a simpler circuit configuration compared with conventional one, then the circuit loss can be decreased. To validate the effectiveness of the proposed antenna, we simulate a small two-element inverted-F antenna array. Then, we confirm that the correlation coefficients between any two branches are less than 0.50, and the reflections and coupling can be decreased.