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Fabry-Perot Resonator Antenna Design Based on Phased Array Feed.

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Title: Fabry-Perot Resonator Antenna Design Based on Phased Array Feed.
Authors: Li, Zechen1 13105345464@163.com, Weng, Zibin1,2, Li, Yahong1, Su, Youqian1, Guo, Jingnan1
Source: Progress in Electromagnetics Research C. 2026, Vol. 168, p56-63. 8p.
Subjects: Fabry-Perot resonators, Phased array antennas, Microstrip antenna arrays, Reflective materials, Antennas (Electronics), Antenna design
Abstract: To address the issues of narrow gain bandwidth and severe element coupling faced by traditional Fabry-Perot resonant antennas in phased-array feed systems, this paper proposes a decoupling design method based on a highly optimized resonant mode height. By analyzing the electric field distributions and coupling mechanisms under multi-feed conditions, an improved resonator height calculation formula suitable for phased-array feeds was derived, achieving mutual suppression of energy between reflected wave coupling and inter-element coupling. A 2 × 2 microstrip antenna array is used as the feed source. Combined with a multilayer positive phase gradient partially reflective surface, a Fabry-Perot antenna prototype operating at 28 GHz was designed and fabricated. Simulated and experimental results demonstrate that compared to conventional designs, this antenna achieves a maximum gain at 28 GHz, increased from 21.80 dBi to 23.15 dBi, with the 3-dB gain bandwidth expanded from 1350 MHz to 1730 MHz. This study provides an effective approach for achieving a broadband high-gain design in phased-array fed Fabry-Perot resonant antennas. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:To address the issues of narrow gain bandwidth and severe element coupling faced by traditional Fabry-Perot resonant antennas in phased-array feed systems, this paper proposes a decoupling design method based on a highly optimized resonant mode height. By analyzing the electric field distributions and coupling mechanisms under multi-feed conditions, an improved resonator height calculation formula suitable for phased-array feeds was derived, achieving mutual suppression of energy between reflected wave coupling and inter-element coupling. A 2 × 2 microstrip antenna array is used as the feed source. Combined with a multilayer positive phase gradient partially reflective surface, a Fabry-Perot antenna prototype operating at 28 GHz was designed and fabricated. Simulated and experimental results demonstrate that compared to conventional designs, this antenna achieves a maximum gain at 28 GHz, increased from 21.80 dBi to 23.15 dBi, with the 3-dB gain bandwidth expanded from 1350 MHz to 1730 MHz. This study provides an effective approach for achieving a broadband high-gain design in phased-array fed Fabry-Perot resonant antennas. [ABSTRACT FROM AUTHOR]
ISSN:19378718
DOI:10.2528/PIERC26010806