A Compact Dual-Band Mimo Antenna of Mobile Phone

A compact dual-band multiple-input-multiple-output (MIMO) antenna is presented. The MIMO antenna consists of two orthogonal elements with edge-to-edge separation of nearly 0.047λ0 at 2.0 GHz, and the element is two-strip structure which can help to improve the impedance matching and isolation. Result shows a dual-band of 76% from 1.62 to 3.6 GHz and 28.5% from 4.44 to 5.92 GHz. The MIMO antenna has strong robust property to the nearby conducting elements, and that is an advantage over the conventional MIMO antennas. The mean effective gain (MEG), radiation efficiency, correlation coefficient, and effective diversity gain (EDG) are calculated to evaluate the diversity performance of the MIMO antenna. To provide quantifications for the performance of the MIMO antenna in real-world usage condition, effects of human hand and head on radiation efficiency and total radiated power (TRP) are investigated. The results indicate the antenna serving as a phone antenna can provide spatial and pattern diversity to combat multipath fading.

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