A Simple Low-Cost Shared-Aperture Dual-Band Dual-Polarized High-Gain Antenna for Synthetic Aperture Radars

Fan Qin*, Steven Gao, Qi Luo, Chun Xu Mao, Chao Gu, Gao Wei, Jiadong Xu, Janzhou Li, Changying Wu, Kuisong Zheng, Shufeng Zheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

This paper presents a novel shared-aperture dual-band dual-polarized (DBDP) high-gain antenna for potential applications in synthetic aperture radars (SARs). To reduce the complexity of SAR antennae, a DBDP high-gain antenna based on the concept of Fabry-Perot resonant cavity is designed. This antenna operates in both C - and X-bands with a frequency ratio of 1:1.8. To form two separate resonant cavities, two frequency selective surface layers are employed, leading to high flexibility in choosing desired frequencies for each band. The beam-scanning capability of this proposed antenna is also investigated, where a beam-scanning angle range of ±15° is achieved in two orthogonal polarizations. To verify this design concept, three passive antenna prototypes were designed, fabricated, and measured. One prototype has broadside radiation patterns, while the other two prototypes have frozen beam scanned to +15°. The measured results agree well with the simulated ones, showing that the high gain, high port isolation, and low cross-polarization levels are obtained in both the bands. Compared with the conventional high-gain DBDP SAR antennae, the proposed antenna has achieved a significant reduction in the complexity, mass, size, loss, and cost of the feed network.

Original languageEnglish
Article number7460905
Pages (from-to)2914-2922
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Volume64
Issue number7
DOIs
Publication statusPublished - 27 Apr 2016

Keywords

  • Antenna
  • dual band
  • dual polarization
  • Fabry-Perot (FP)
  • high gain
  • synthetic aperture radar (SAR) antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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