Dual-Polarized Nonuniform Fabry-Pérot Cavity Antenna With Flat-Topped Radiation Pattern

A method to realize the flat-topped radiation pattern of Fabry-Pérot cavity antenna is proposed based on the ray-tracing model. In the design, a nonuniform partially reflective surface of dielectric substrate is proposed to reduce the sidelobe level and get a fast roll-off in the operating frequency...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2022-05, Vol.21 (5), p.1060-1064
Main Authors: Ran, Xi, Wang, Xiao-Hua, Hu, Yi-Di, Qu, Shi-Wei, Wang, Bing-Zhong
Format: Article
Language:English
Subjects:
Antenna feeds
Antenna radiation patterns
Antennas
Dual polarization (waves)
Dual-polarized antenna
Fabry-Perot interferometers
Fabry–Pérot cavity (FPC) antenna
flat-topped radiation pattern (FTRP)
Frequencies
Lenses
Phased arrays
Radiation
Ray tracing
ray-tracing model
Reflection
Sidelobes
Substrates
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Summary:A method to realize the flat-topped radiation pattern of Fabry-Pérot cavity antenna is proposed based on the ray-tracing model. In the design, a nonuniform partially reflective surface of dielectric substrate is proposed to reduce the sidelobe level and get a fast roll-off in the operating frequency band. Besides, a dumb source array is added around the dual-polarized feed array to minimize the disparity of beamwidth between E- and H-plane. The antenna was calculated with the proposed method, simulated by the full-wave simulation, and validated by the experiment. Compared with the traditional array synthesis method, there is no need to design a complex feed network because each coaxial port is fed equally in phase and amplitude. In addition, based on the proposed method, the aperture size is small and the flat-topped beamwidth is flexible.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2022.3159176