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2016-09-19
Compact UWB Band-Notch MIMO Antenna with Embedded Antenna Element for Improved Band Notch Filtering
By
Progress In Electromagnetics Research C, Vol. 67, 117-125, 2016
Abstract
A compact printed ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna with embedded structure is proposed. The proposed MIMO antenna consists of two coplanar waveguide-fed (CPW) antenna elements, and the element with smaller size is built in the radiator of the other element. Thus, the compact size, 30 × 22 mm2, is completely determined by the larger one, which makes the MIMO antenna have similar size to the conventional single UWB antennas. The antenna elements are fed perpendicularly to achieve superior isolation. A T-shaped parasitic stub, a pair of C shaped slots, an extended Z-shaped stub and a rectangular slot are employed and each two structures filter the interference for one antenna element. The achieved rejection bands remain relatively stable over the stop-band frequencies and decline rapidly at cut-off frequencies. Thus the proposed MIMO antenna obtains superior filtering performance. The proposed antenna is fabricated and measured. The measured results indicate that two antenna elements can operate in the impedance bandwidth larger than 3.1-10.6 GHz with notched bands of 5-6 GHz, and the mutual coupling is below -15 dB over the entire UWB frequency spectrum. The proposed MIMO antenna is a competitive candidate for UWB MIMO communication systems.
Citation
Jun Tao Quanyuan Feng , "Compact UWB Band-Notch MIMO Antenna with Embedded Antenna Element for Improved Band Notch Filtering," Progress In Electromagnetics Research C, Vol. 67, 117-125, 2016.
doi:10.2528/PIERC16071903
http://www.jpier.org/PIERC/pier.php?paper=16071903
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