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2023-12-17
An X-Band Frequency Beam-Scanning Circularly-Polarized Leaky-Wave Antenna with Low Axial Ratio in All Half-Power Beamwidth Ranges
By
Progress In Electromagnetics Research C, Vol. 139, 129-137, 2024
Abstract
A novel frequency beam-scanning circularly-polarized leaky-wave antenna with the axial ratio (AR) of less than 3 dB in all the half-power beamwidth ranges based on an H-shaped slow-wave transmission line is proposed for X-band applications. The proposed circularly-polarized leaky-wave antenna is composed of a novel slow-wave transmission line and two rows of elliptical patch structures, leading to wide AR bandwidth, backward-to-forward beam scanning, and stable gain. To verify the proposed antenna, one prototype with a center frequency of 10 GHz is designed and fabricated. Measured results indicate that the main beam scans from -25° to +28° within the operating frequency variation from 8.7 to 11.5 GHz. The 3-dB AR bandwidth and maximum gain are 27.7% and 10.28 dBic, respectively.
Citation
Dezhuang Zhang, Zhongbao Wang, Zhixia Xu, Hongmei Liu, Mingming Gao, and Shao-Jun Fang, "An X-Band Frequency Beam-Scanning Circularly-Polarized Leaky-Wave Antenna with Low Axial Ratio in All Half-Power Beamwidth Ranges," Progress In Electromagnetics Research C, Vol. 139, 129-137, 2024.
doi:10.2528/PIERC23102605
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