Broadband SIW Cavity-Backed Modified Dumbbell-Shaped Slot Antenna

被引：56
|
作者：
Cheng, Tong [1 ]
Jiang, Wen [1 ]
Gong, Shuxi [1 ]
Yu, Yaqing [1 ]
机构：
[1] Xidian Univ, Natl Key Lab Antennas & Microwave Technol, Collaborat Innovat Ctr Informat Sensing & Underst, Xian 710071, Shaanxi, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 05期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Broadband antenna; cavity-backed slot antenna; high gain; high-order mode; substrate integrated waveguide (SIW); WAVE; BANDWIDTH; ENHANCEMENT;
D O I：
10.1109/LAWP.2019.2906119
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：
A cavity-backed modified dumbbell-shaped slot antenna based on a substrate integrated waveguide technology is proposed in this letter. Compared with the traditional dumbbell-shaped slot, the modified dumbbell-shaped slot not only introduces several new resonant points, but also makes the antenna obtain a higher gain. In addition, the high-order resonant modes (TE 102, TE 301, TE 302) inside the subcavity are excited by the ground coplanar waveguide feeding structure, and the broadband impedance bandwidth can be achieved by making the high-order modes close to each other. The measured results showthat the proposed antenna achieves an impedance bandwidth of 26.7% from 18.2 to 23.8 GHz and a peak gain of 9.5 dBi at 20.4 GHz. The cross-polarization levels of the antenna are around -40 dB at three measured frequencies.
引用
收藏
页码：936 / 940
页数：5
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