A Wideband Circular-Polarized Beam Steering Dielectric Resonator Antenna Using Gravitational Ball Lens

被引：23

作者：

Chen, Zhijiao ^{[1
]}

Liu, Qi ^{[1
]}

Sanz-Izquierdo, Benito ^{[2
]}

Liu, Haiwen ^{[3
]}

Yu, Junsheng ^{[1
]}

Chen, Xiaodong ^{[4
]}

机构：

[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China

[2] Univ Kent, Sch Engn & Digital Arts, Canterbury CT2 7NT, Kent, England

[3] Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China

[4] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London E1 4NS, England

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2021年 / 69卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Lenses; Antenna radiation patterns; Broadband antennas; Gain; Dielectric resonator antennas; Beam steering; Ball lens; base station; beam steering; circular polarization; dielectric resonant antenna; pattern reconfigurable; wideband;

D O I：

10.1109/TAP.2020.3025243

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：

This communication proposes a wideband circular-polarized (CP) beam steering dielectric resonator antenna (DRA) using a gravitational ball lens. It offers a passive means for wall or ceiling mounted base station antennas to adjust their patterns by the gravity of ball lenses. This novel antenna concept overcomes the difficulties of achieving wideband axial ratio versus the pattern reconfigurability of the existing antennas. The operation of the ball lens has been intensively studied. It is found that the ball lens provides 1.2 dB antenna gain enhancement, whereas enabling beam tilting via energy coupling to the offset direction. As a demonstration, a codesign of DRA and ball lens has been developed at 2.4 GHz, achieving 42% impedance bandwidth, 39% axial ratio bandwidth, and +/- 40 degrees beam steering. Reasonable agreement between simulated and measured results is observed. The proposed DRA provides a low-cost solution for base stations to be mounted at an angle and effectively cover the indoor users.

引用

页码：2963 / 2968

页数：6

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