A Triband Low-Profile High-Gain Planar Antenna Using Fabry-Perot Cavity

Fan Qin*, Steven Gao, Qi Luo, Gao Wei, Jiadong Xu, Jianzhou Li, Chao Gu, Chunxu Mao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


A triband antenna with high gain and low profile is proposed. This antenna is based on the concept of Fabry-Perot cavity antenna (FPCA) and three resonances are obtained by employing two frequency selective surface (FSS) layers. Two FSS layers lead to two resonant frequencies by making each FSS layer satisfy the resonant condition of Fabry-Perot cavity. The third resonant frequency is obtained by exploiting the combined effects of the two FSS layers together. The operating principle of this proposed antenna is explained and the achievable frequency range is investigated. It is shown that the proposed method enables all three resonant frequencies to be independently tuned within certain frequency range. Because of the 0° reflection phase of the combined-FSSs, the present antenna has a low profile. To verify the design concept, one C-/X-/Ku-band FPCA is designed, fabricated and tested. Experimental results agree well with the simulated results. High gain with good impedance matching in three bands is obtained, which reaches a peak gain of 13.4 dBi at 5.2 GHz, 18.9 dBi at 9.7 GHz, and 20 dBi at 14.6 GHz. The overall height of the proposed antenna is approximately 0.36 wavelength at its lowest operating frequency.

Original languageEnglish
Article number7857705
Pages (from-to)2683-2688
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Issue number5
Early online date16 Feb 2017
Publication statusPublished - May 2017


  • Antenna
  • array
  • fabry-Perot
  • high gain
  • partially reflective surface
  • triband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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