Mutual Coupling Reduction Using Metamaterial

Dr. Naobumi Michishita
National Defense Academy Department of Electrical and Electronic Engineering

A dipole antenna composed of a composite right/left-handed (CRLH) transmission line has been proposed. The CRLH dipole antenna can be miniaturized in the fundamental resonant mode with n = -1. However, the bandwidth narrows when CRLH transmission line is used as the antenna element. In this study, a dipole antenna with a CRLH parasitic element is investigated. The dipole antenna with the CRLH parasitic element has band rejection characteristics. The mutual coupling between two dipole antennas can be suppressed by arranging CRLH parasitic elements between the two antennas.


For experimental verification, the CRLH parasitic element is composed of the interdigital capacitor and meander line inductor with 50 microns space. In addition, large area for milling processing is required because the CRLH parasitic element is composed of several unit cells.
The FP-21T Precision allows us precision that the metamaterial structure with fine line and space can be fabricated.