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An SICL-Excited Wideband Circularly Polarized Cavity-Backed Patch Antenna for IEEE 802.11aj (45 GHz) Applications

  • Southeast University, Nanjing

Research output: Contribution to journalArticlepeer-review

Abstract

A wideband circularly polarized cavity-backed patch antenna excited by substrate integrated coaxial line (SICL) is proposed in this letter. The antenna is composed of two corner truncated rectangular patches, two L-shaped patches, a backed cavity, and an I-shaped feed network. The four patches and the feed network generate a circularly polarized radiation pattern in a sequential-rotation method. The backed cavity is used to prevent surface wave and increase the directivity. The achieved AR < 3 dB bandwidth is 15.5% (41.5 ∼ 48.5 GHz). The measured S11 <-15 dB impedance bandwidth is 14.65% (41.7 ∼ 48.3 GHz). The peak gain is 8.9 dBi, and the 3-dB gain bandwidth is 17.5% (41.5 ∼ 49.5 GHz). The measurements are in agreement with the simulations.

Original languageEnglish
Article number7339666
Pages (from-to)1265-1268
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Volume15
DOIs
StatePublished - 2016
Externally publishedYes

Keywords

  • Axial ratio (AR)
  • backed-cavity
  • circular polarization (CP)
  • microstrip patch antenna
  • substrate integrated coaxial line (SICL)
  • wideband

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