This paper demonstrates a novel dual-band operated MIMO antenna which consisted of planar monopole (main antenna) and 3D\r\nslot element (auxiliary antenna). The main antenna is printed on a 1.6mm thick FR4 board, while the auxiliary antenna is fabricated\r\nwith gold-coated copper. A lumped impedance network is applied to enhance matching effect at port1. From simulations by\r\ncommercial software, it can be found that the proposed antenna is able to cover GSM800, GSM900 (lower band), and LTE/\r\nWiMAX/WLAN (higher band) quite well. Good agreements between simulations and measurements are obtained. Corresponding\r\nmeasured results, antenna efficiency, peak gain, and radiation patterns, are presented at the same time. By equipping a passive decoupling\r\nelement, the coupling power on the ground is radiated into free space, and great enhancement of isolation between\r\nantenna elements, especially for lower band, is achieved.
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