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A compact wideband high-gain circularly polarized array antenna based on SIGW-SRP

Published online by Cambridge University Press:  20 December 2024

Pengpeng Chen Open the ORCID record for Pengpeng Chen [Opens in a new window] ,
Wenjian Wang ,
Lihui Wang ,
Qiuhua Lin ,
Da Hou  and
Zhiyong Luo
Pengpeng Chen
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China
Wenjian Wang
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China Kuang-Chi Institute of Advanced Technology, Shenzhen, China
Lihui Wang
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China
Qiuhua Lin
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China
Da Hou
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China Pengcheng Laboratory, Shenzhen, China
Zhiyong Luo*
Affiliation:
School of Electronics and Communication Engineering, Sun Yat-sen University, Shenzhen, China Pengcheng Laboratory, Shenzhen, China
*
Corresponding author: Zhiyong Luo; Email: [email protected]
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Abstract

A compact, wideband, and high-gain circularly polarized array antenna is proposed based on substrate integrated gap waveguide (SIGW) using sequential rotational phase (SRP). The array antenna consists of four $2\times2$ corner-cutting corner patches and an SIGW-SRP feeding network. The SIGW-SRP feeding network is achieved by utilizing the spatial vector addition property to compensate for phase, aiming to improve the bandwidth and gain. Unlike the traditional SRP feeding network, the proposed feeding scheme is simpler and easier to fabricate, and each port can achieve more stable phase and bandwidth. In addition, benefiting from the surface wave suppression and in-phase reflection property of SIGW, the proposed array antenna has a stable radiation pattern and low cross-polarization covering wideband frequencies. The measured results indicate that the −10-dB impedance bandwidth ranges from 12.2 to 17.3 GHz (34.6%), the 3-dB axial ratio bandwidth ranges from 13.5 to 16.7 GHz (21.2%), and the peak gain is 16 dBic.

Keywords

circularly polarized antennasubstrate integrated gap waveguidewideband antenna
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 17 , Issue 1 , February 2025 , pp. 92 - 103
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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