Compact Coradiator UWB-MIMO Antenna With Dual Polarization

Two compact coradiator multiple-input-multiple-out (MIMO) antennas operating in the UWB frequency band with dual polarization are proposed. Different from traditional MIMO antennas, the radiator is shared by two antenna elements, which greatly reduce the overall size of the MIMO system. High isolati...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2014-09, Vol.62 (9), p.4474-4480
Main Authors: Mao, Chun-Xu, Chu, Qing-Xin
Format: Article
Language:English
Subjects:
Antenna measurements
Antenna radiation patterns
Antennas
Compact
coradiator
dual polarization
Feeding
Frequency bands
Gain
Grounds
MIMO
Polarization
Ports (Computers)
Radiators
Simulation
Slot antennas
Ultra wideband antennas
UWB-MIMO antenna
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Summary:Two compact coradiator multiple-input-multiple-out (MIMO) antennas operating in the UWB frequency band with dual polarization are proposed. Different from traditional MIMO antennas, the radiator is shared by two antenna elements, which greatly reduce the overall size of the MIMO system. High isolation between the two antenna elements is achieved by etching a T-shaped slot in the radiator and extending a stub on the ground. Dual polarization can be realized by exciting the pentagonal radiator with perpendicular feeding structure. The simulated results of current and electric-field distribution show the dual-polarization characteristics of the diversity system. Besides, a four units UWB MIMO antenna is also proposed. Furthermore, the diversity characteristics of mean effective gains (MEGs) and diversity gain (DG) are also studied. The simulated and measured results demonstrate that the UWB-MIMO antenna has good impedance matching, isolation and dual polarization characteristics.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2014.2333066