Circularly Polarized Slot Antennas With Dual-Mode Elliptic Cavity
Circularly Polarized Slot Antennas With Dual-Mode Elliptic Cavity
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DOI：
10.1109/lawp.2020.2978343
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发表时间：
2020-03
影响因子：
4.2
通讯作者：
Yizhen Xu;Zhan Wang;Yuandan Dong
中科院分区：
文献类型：
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作者：
Yizhen Xu;Zhan Wang;Yuandan Dong
本文提出了一种基于双模椭圆基板集成波导（SIW）腔的圆极化缝隙天线。首先分析了双模腔上的电流分布，以便于布局设计。天线分为三类。对于第一种，在所述空腔的上表面蚀刻三个不平衡槽，中心矩形槽垂直于所述长轴两侧的弧形槽。对于另外两根天线，在空腔的上表面蚀刻两对对称弧形槽。其中一个在中心有一个额外的短针。圆极化是通过在5 ~ 6ghz频率范围内同时激励两个准tm110腔模并将它们组合在一起实现的。从理论上详细阐述了双模天线的工作原理，并进行了实验验证。该天线具有工作原理新颖、结构简单、低损耗、低外形、低成本、高增益等特点，是室内通信的理想选择。
Circularly polarized slot antennas based on dual-mode elliptic substrate integrated waveguide (SIW) cavities are proposed in this letter. Current distribution on the dual-mode cavity is analyzed first to facilitate the layout design. The antennas are divided into three categories. For the first one, three unbalanced slots are etched on the upper surface of the cavity with a central rectangular slot placed perpendicularly to the arc-shaped slots on the two sides of the long axis. For the other two antennas, two pairs of symmetric arc-shaped slots are etched on the upper surface of the cavity. One of them has an additional shorting-pin in the center. Circular polarization is achieved by simultaneously exciting two quasi-TM110 cavity modes and combining them in the 5–6 GHz frequency range. The working principle of the dual-mode antennas is theoretically illustrated in detail and experimentally verified. The proposed antennas offer attractive features, including novel working principle, simple structure, low loss, low profile, low cost, and good gain, appearing as good candidates for indoor communication.