Abstract
A compact four-port multiple-input multiple-output (MIMO) antenna is realized. The proposed antenna is designed as a stacked microstrip patch antenna that offers triple-band performance at 2.9 GHz, 5.0 GHz, and 5.9 GHz. The proposed antenna is a suitable candidate for WLAN applications covering three distinct bands of IEEE 802.11 protocols. All four ports of the designed antenna are uncorrelated, and a very low mutual coupling of less than –23 dB is obtained. The dimensions of the four-element MIMO are 0.4λ0 × 0.4λ0 × 0.03λ0. The step-by-step evaluation of the proposed antenna is presented in this work. A prototype of the proposed antenna is fabricated, and experimental results are compared with the simulated results. Both simulated and experimental results are found in close agreement.
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