A study on reduction of electromagnetic coupling between symmetric antennas using even-odd mode analysis

Abstract

We propose a method for reducing electromagnetic coupling between two monopole antennas for MIMO communications that do not use any lumped element components. In the past, the decoupling method for connecting antennas required two steps, decoupling and matching, in order, and used lumped element components for each step. The previous design method using even-odd mode analysis also uses one lumped element component between antennas. The proposed method of this paper also uses even-odd mode analysis, but the decoupling condition can be set independently for each mode, and both decoupling and matching can be designed simultaneously, without using lumped element components. The decoupling effect was confirmed by simulation and measurement.