Design of Nine-Shaped MIMO Antenna Using Parasitic Elements to Reduce Mutual Coupling

Abstract

This article presents a multi-band nine-shaped parasitic element which operates at wireless LAN, Wi-Fi and C-band applications. In this current design, a parasitic element is inserted between the patches having a size 60 mm × 40 mm which occupied 2400 mm2. Due to this type, technical arrangement in the design of antenna structure greatly reduced the mutual coupling (S12) around 45 dB. This reduction is obtained by inserting parasitic elements between the two microstrip patch antennas with separation between them maintained at 0.25λ0. To represent this type of arrangement the proposed design which improves the antenna parameters including the radiation patterns also.