2 x 2 Slot Spiral Cavity-Backed Antenna Array Fed by Printed Gap Waveguide

被引：15
作者：
Baghernia, Elham [1 ]
Ali, Mohamed Mamdouh M. [2 ]
Sebak, Abdel Razik [1 ]
机构：
[1] Concordia Univ, Dept Elect & Comp Engn, Montreal, PQ H3G 1M8, Canada
[2] Assiut Univ, Dept Elect Engn, Assiut 71543, Egypt
来源：
IEEE ACCESS | 2020年 / 8卷
关键词：
Spirals; Antenna arrays; Silicon carbide; Microstrip; Slot antennas; Antenna feeds; Substrates; Slot spiral antenna; substrate integrated cavity (SIC); circular polarization (CP); printed gap waveguide (PGW); sequential rotation feeding; printed circuit board (PCB); HIGH-GAIN; DESIGN;
D O I：
10.1109/ACCESS.2020.3024564
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A wideband circularly polarized slot spiral antenna array excited by a printed gap waveguide (PGW) feeding network is presented in this paper. The equiangular slot spiral is etched on the top wall of the substrate integrated cavity (SIC) in which TE120 mode is excited. Due to excitation of this mode, electric field distribution in two halves of the substrate integrated cavity is the same in magnitude and 180 degrees out of phase. Therefore, the slot spirals are fed differentially by this cavity and become independent of the complex vertical balun structures. The sequential feeding is implemented by PGW technology, which results in high efficiency of the array structure. Moreover, by employing SIC and PGW technologies, this antenna is compatible with low cost printed circuit board (PCB) technology. A prototype of the proposed antenna was fabricated and measured to evaluate the antenna performance. The fabricated antenna array shows the -10 dB impedance bandwidth of 23.7% and the 3 dB AR of 22.5% with the measured RHCP gain of 12.3 dBic.
引用
收藏
页码：170609 / 170617
页数：9
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