A broadband single-fed circularly polarized patch filtenna with high suppression level

Huayan Jin*, Shanshan Nie, Wenlei Wang, Kuo Sheng Chin, Liang Peng, Guo Q. Luo

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

2 Scopus citations

Abstract

In this manuscript, a single-fed circularly polarized patch antenna is presented, which features a large bandwidth and a high out-of-band suppression level, simultaneously. By loading a stacked patch and etching U-shaped slots on the driven and stacked patches respectively, a high out-of-band suppression level can be obtained without any extra filtering circuits. Furtherly, to widen the bandwidth of the filtering CP patch, two T-shaped slots and a stepped via-line-via feeding structure are introduced. Finally, for demonstration, a prototype was fabricated and measured. The measurements indicated a large impedance bandwidth of 35.7%, an axial-ratio bandwidth of 10.8%, a peak gain of 8.5 dBic, and a high out-of-band suppression level of up to 28.5 dB in stopbands.

Original languageEnglish
Pages (from-to)1394-1400
Number of pages7
JournalMicrowave and Optical Technology Letters
Volume64
Issue number8
DOIs
StatePublished - 08 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley Periodicals LLC.

Keywords

  • circular polarization
  • filtering antenna (filtenna)
  • patch antenna
  • single-fed
  • wideband

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