Analysis and Reduction on in-Band RCS of Fabry-Perot Antennas

Lei Gan, Wen Jiang, Qiang Chen, Xiaoqiu Li, Zhipeng Zhou

Research output: Contribution to journalArticlepeer-review

Abstract

In this article, a method is proposed to reduce the in-band radar cross section (RCS) of the high-gain Fabry-Perot antenna (FPA) based on the cancellation between the antenna mode RCS (AM-RCS) and structural mode RCS (SM-RCS). The ports of the two back-fed microstrip array antennas are connected to form the partial reflective surface (PRS) with a high reflectivity. The phase delay line (PDL) is proposed to control the AM-RCS to cancel out the SM-RCS. The AM-RCS is used to further reduce the in-band RCS of the low RCS high-gain FPA instead of being eliminated by the matched load. The measured results show that the FPA has a great impedance matching within the band of 9.8-11.2 GHz, and the maximum realized gain of the FPA reaches 10.7 dBi. The simulated bistatic RCS of the FPA is less than -14 dBsm within ±90 degrees angle domain at the center frequency. The minimum monostatic RCS of the proposed FPA is reduced by 17.9 dB compared with the reference FPA. Furthermore, this article provides a design basis for the feed line length of the FPA from the perspective of scattering performance.

Original languageEnglish
Article number9162018
Pages (from-to)146697-146706
Number of pages10
JournalIEEE Access
Volume8
DOIs
Publication statusPublished - 2020
Externally publishedYes

Keywords

  • Antenna mode radar cross section (AM-RCS)
  • dividing scattering field
  • fabry-perot antenna (FPA)
  • radar cross section (RCS)

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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