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access icon free Microstrip antenna array mutual coupling suppression using coupled polarisation transformer

© The Institution of Engineering and Technology
Received 12/12/2016, Accepted 05/07/2017, Revised 20/06/2017, Published 11/07/2017

This study presents a periodic defected ground structure (PDGS) to suppress the mutual coupling (MC) between coplanar antenna elements in a multiple-input and multiple-output (MIMO) communication system. The proposed PDGS consists of three defected ground structure units. They are etched away from the ground plane between antenna elements. The coupled polarisation transformer characteristic of the proposed PDGS is utilised to increase the antenna elements isolation. The increased coupled vertical linear polarisation component and decreased coupled horizontal linear polarisation component contribute to reduce the MC between antenna elements. By using this method, the authors achieve low MC level and better MIMO corresponding capacity. This method has little influence on the far-filed main radiation properties of the antenna elements.

Inspec keywords: microstrip antenna arrays; defected ground structures; electromagnetic wave polarisation; antenna radiation patterns; MIMO communication

Other keywords: coupled vertical linear polarisation component; far-field main radiation properties; microstrip antenna array mutual coupling suppression; periodic defected ground structure; multiple-input and multiple-output communication system; MIMO communication system; PDGS; antenna element isolation; coupled horizontal linear polarisation component; ground plane; coupled polarisation transformer characteristic

Subjects: Waveguide and microwave transmission line components; Antenna arrays; Radio links and equipment

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