A Broadband High-Gain Circularly Polarized Wide Beam Scanning Leaky-Wave Antenna

Yiming Zhang; Hui Liu; Chenyang Meng; Yuxin Lin; Yuan Zhang; Erik Forsberg; Sailing He

doi:10.1109/ACCESS.2020.3021201

IEEE Access (Jan 2020)

A Broadband High-Gain Circularly Polarized Wide Beam Scanning Leaky-Wave Antenna

Yiming Zhang,
Hui Liu,
Chenyang Meng,
Yuxin Lin,
Yuan Zhang,
Erik Forsberg,
Sailing He

Affiliations

Yiming Zhang: ORCiD; RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Hui Liu: ORCiD; RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Chenyang Meng: ORCiD; RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Yuxin Lin: ORCiD; RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Yuan Zhang: RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Erik Forsberg: ORCiD; RF Circuit and Microwave System Laboratory, Center for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou, China
Sailing He: ORCiD; RF Circuit and Microwave System Laboratory, Centre for Optical and Electromagnetic Research, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China

DOI: https://doi.org/10.1109/ACCESS.2020.3021201
Journal volume & issue: Vol. 8
pp. 171091 – 171099

Abstract

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A new type of broadband circularly polarized leaky-wave antenna (LWA) with high-gain based on a corrugated substrate integrated waveguide (CSIW) structure is proposed and investigated. The CSIW structure that employs open-circuit stubs to replace metallic vias has the advantages of low-cost and easy fabrication as compared to conventional substrate integrated waveguides. Each unit-cell of the proposed LWA consists of two quarter-wavelength microstrip lines and a half-mode CSIW cell with three open-circuit stubs. Two M-shaped slots etched on the half-mode CSIW cell enables the generation of circularly polarized (CP) radiation. The full LWA, which consists of thirteen matched unit-cells cascaded along the direction of propagation enables continuous backward to forward beam scanning. The properties of the CSIW structure, including impedance matching and phase constant, are analyzed by Bloch impedance and dispersion simulations and the influence of the dimensions of the open-circuit stubs on the CP LWA performance is also investigated. A protype of the proposed LWA is fabricated and characterized. The measured results indicate that the proposed CSIW LWA has a high peak gain (9.3-12.5 dBi) throughout a large beam-scanning angle range from -28° to +25°, and the impedance bandwidth and 3-dB axial ratio (AR) bandwidth are over 40% covering the full $\textit {Ka}$ -band.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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