Compact, Low-Profile, Bandwidth-Enhanced Substrate Integrated Waveguide Filtenna

Kun Zhi Hu, Ming Chun Tang, Mei Li, Richard W. Ziolkowski

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

In this letter, a compact, low-profile, bandwidth-enhanced, dual-cavity substrate integrated waveguide (SIW) filtenna is demonstrated. Two SIW cavities are stacked vertically on top of each other. A complementary split-ring resonator slot is etched in the top surface of the uppermost cavity, causing the top surface to act as a patch antenna. The operational impedance bandwidth is significantly enhanced by merging the three resonances that arise from this configuration. One is introduced by the patch, and the other two are inherently generated by the two cavities. A metallized coupling post is introduced from the ground plane through both cavities to the upper surface to excite the fundamental resonant mode of the patch, as well as to electromagnetically couple the two cavities. The optimized filtenna was fabricated by a standard printed circuit board technology and tested. It has a low profile λ 0 and a compact size 0.62λ 0×0.62λ0 at its center frequency, f0=2.95GHz. The measured results agree well with their simulated values. They demonstrate a 6.3% fractional bandwidth, a maximum realized gain of 6.73 dBi, a flat gain profile within its passband, and an excellent out-of-band selectivity.

Original languageEnglish (US)
Article number8409954
Pages (from-to)1552-1556
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Volume17
Issue number8
DOIs
StatePublished - Aug 2018

Keywords

  • Bandwidth
  • compact antenna
  • filtenna
  • low-profile antenna
  • patch antenna
  • substrate integrated waveguide (SIW)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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