volume | PIER Journals

Abstract

This paper presents a compact multiple-input multiple-output (MIMO) microstrip antenna system covering the 2.4 GHz and 5 GHz wireless local area network (WLAN) bands. By etching rectangular slots on the microstrip patch and adjusting the dimensions of both the antenna and the rectangular slots, the antenna system can radiate at the operating frequencies of 2.44 GHz and 5.3 GHz simultaneously. To achieve high port isolation across the two distinct WLAN bands, a ``WM''-shaped defected ground structure (DGS) is etched on the ground plane to reduce mutual coupling in the 2.44/5.3 GHz frequency bands. Simulation results demonstrate that within the frequency ranges of 2.41-2.49 GHz and 5.22-5.39 GHz, the isolation of the two dual-band antenna systems achieves maximum coupling suppression of 26.7 dB and 14 dB, respectively. This DGS can serve as a potential solution for decoupling in WLAN MIMO antennas.

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Dr. Junhao Xu

Professor Yafei Wang