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A study on isolation enhancement of MIMO antenna using differential ground path

This article presents the characteristics of the enhanced isolation antenna realized for EGSM/DCS systems.The proposed antenna consists of the two radiation planar inverted F antennas are orthogonally arranged. The operating frequency of the two radiators is designed to be equal and enhanced isolation of −18 ∼ −21 dB is achieved. A high isolation is obtained by adding additional ground path of the antenna. The multiple‐input multiple‐output structure gives high gain and low correlation (< 0.2). Details of the proposed antenna are described and experimental results of constructed prototype also are presented. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:802–805, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26637