Fabry-Pérot Resonator Antenna in Equivalent-Medium Metamaterials

Wei Yuan, Jianfeng Chen, Wen Xuan Tang, Lei Wang, Tie Jun Cui, Qiang Cheng

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Abstract

In this communication, a wideband Fabry-Pérot resonator antenna (FPRA) is proposed. An optimized partially reflective surface (PRS) with a transverse permittivity gradient (TPG) composed of four nonrotationally symmetric sections is employed in the design of the antenna. The use of nonrotationally symmetric PRS results in more than 31% improvement of the 3 dB gain bandwidth compared with the traditional rotationally symmetric PRS. Furthermore, two types of nonresonant metamaterials (metallic-ring and etching-hole unit cells) are used to implement the equivalent permittivity of PRS. In this way, the equivalent permittivity value covers a broad range (3.5-9.5) for the same dielectric. As a result, the restrictions imposed by the use of only commercially available dielectrics and the errors that occur during the fabrication and assembly progress of different materials can be avoided. The primary radiator of FPRA is a double-ridge waveguide horn, which ensures wideband antenna operation. An FPRA prototype is fabricated and measured, which exhibits a broad bandwidth (5.2-11.5 GHz) with the return loss |S11| of less than -10 dB. The measured 3 dB gain bandwidth is 73.8% (in the frequency range of 5.3-11.5 GHz) with a peak gain of 17.1 dBi at 7.8 GHz.

Original languageEnglish
Pages (from-to)7906-7911
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume69
Issue number11
Early online date5 May 2021
DOIs
Publication statusPublished - Nov 2021

Keywords

  • 3 dB gain bandwidth
  • Fabry-Pérot resonator antenna (FPRA)
  • PRS
  • broadband
  • metamaterials (MTMs)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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