Abstract
A novel ultra wideband (UWB) multiple-input-multiple-output (MIMO) antenna with difierent polarizations and band-notch characteristics is proposed in this letter. The antenna consists of two monopole antenna radiating elements with gradual change structure, which are placed perpendicularly to each other and printed on each side of the substrate to achieve a wide bandwidth and difierent polarizations. Band-rejected flltering property in the WLAN band is achieved by etching a H-shaped slot and employing a resonant L-shaped strip on two antenna elements. The proposed antenna has a small size of 27£37£1mm 3 with a bandwidth of 128.6% (2.35{10.82GHz). Within the required band, the isolation for the two ports exceeds 18dB. The envelope correlation coe-cient is also measured.
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