X-band waveguide filtering antenna array with nonuniform feed structure

Fu Chang Chen, Jian Feng Chen*, Qing Xin Chu, Michael J. Lancaster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


This paper proposes a novel design approach for a filtering antenna, which contains an array of 4 by 2 waveguide aperture radiation elements. Coupling matrix theory is introduced in this paper to synthesize the multiple coupled-resonators circuit. Unequal amplitude excitation is applied to the 4×2 elements so as to obtain a low sidelobe level. To demonstrate the concept, an X-band antenna array is designed and fabricated using a three-layer waveguide structure.Measured results show that the filtering antenna array can achieve a gain of more than 15.58 dBi and a radiation efficiency of higher than 90% over the passband (9.91-10.1 GHz). The sidelobe level is-18.3 dB in the H-plane and-21.1 dB in the E-plane.

Original languageEnglish
Article number7936600
Pages (from-to)4843-4850
Number of pages8
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
Early online date31 May 2017
Publication statusPublished - 1 Dec 2017


  • Coupling matrix
  • Filtering antenna
  • High efficiency
  • Low sidelobe
  • Unequal amplitude excitation

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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