Theory and Experiment of Three-Port Polarization-Diversity Cylindrical Dielectric Resonator Antenna

被引：60

作者：

Fang, Xiao Sheng ^{[1
,2
]}

Leung, Kwok Wa ^{[1
,2
]}

Luk, Kwai Man ^{[1
,2
]}

机构：

[1] City Univ Hong Kong, State Key Lab Millimeter Waves, Kowloon 852, Hong Kong, Peoples R China

[2] City Univ Hong Kong, Dept Elect Engn, Kowloon 852, Hong Kong, Peoples R China

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2014年 / 62卷 / 10期

关键词：

Dielectric resonator antenna; diversity antenna; polarization diversity; three-port antenna; SIGNAL CORRELATION;

D O I：

10.1109/TAP.2014.2341698

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The three-port polarization-diversity cylindrical dielectric resonator antenna (DRA) is presented for the first time. The design makes use of the TM01 delta and HEM12 delta+1 modes of the cylindrical DRA. Using the covariance matrix adaptation evolutionary strategy, engineering formulas are obtained to determine the dimensions of the polarization-diversity cylindrical DRA for a given operating frequency and dielectric constant. To demonstrate the usefulness of the formulas, a three-port polarization-diversity cylindrical DRA was designed at 2.4 GHz for WLAN applications. The TM01 delta mode of the cylindrical DRA is excited with a coaxial probe and an omnidirectional radiation pattern is obtained. Two slot pairs are used to excite the broadside HEM12 delta+1x and HEM12 delta+1y modes of the cylindrical DRA. The reflection coefficient, port isolation, radiation pattern, and antenna gain of the antenna were simulated using ANSYS HFSS, while the envelope correlation was calculated from the S-parameters. Measurements were carried out to verify the simulations, and reasonable agreement between them is observed. Measured results show that the isolation between any two ports of the diversity DRA is over 24 dB across the 10-dB impedance bandwidth. A parameter study was carried out to characterize the proposed DRA.

引用

页码：4945 / 4951

页数：7

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