volume | PIER Journals

Abstract

In this paper, a novel frock shaped four-port MIMO antenna is designed, and experimental results were verified for UWB applications. The four elements are placed orthogonal to each other to reduce mutual coupling. The proposed novel-shaped antenna is derived from a circular patch antenna. A series of modifications were made on a circular patch antenna to get desired single novelly shaped radiator. Inserting decoupling stubs in the Plus form between MIMO elements lessened mutual coupling. The entire designing procedure of the proposed four-port antenna was carried out by Characteristic Mode Analysis. The proposed model is printed on an Fr-4 substrate with dimensions of 40x40x1.6 mm³. This novel 4-port antenna is well-operated in the UWB range from 2.8 GHz to 11.4 GHz and bandwidth of 8.6 GHz. The novel shape radiators with good decoupling stubs produce a high impedance bandwidth of as 121.8%, radiation efficiency of 91%, high isolation 26 dB, and a gain of 6 dB in the operating band. The diversity parameters are enveloped correlation coefficient (ECC) less than 0.0011, diversity gain (DG) very near 10 dB, capacity channel loss of 0.28 bp/s/Hz, and mean effective gain of -3.1 dB. The experimental results of the antenna are verified with simulated ones and got good agreement between fabricated and simulated results.

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Prof. Ankireddy Chandra Suresh

Prof. Thatiparthi Reddy