High-Gain Dual-Band Dual-Sense Circularly Polarized Spiral Series-Fed Patch Antenna

Nghia Nguyen-Trong, Shengjian Jammy Chen, Christophe Fumeaux

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Abstract

This paper demonstrates a dual-band circularly polarized (CP) two-dimensional (2D) series-fed patch array antenna. The CP rotating sense in each band is opposite to each other, which makes them well-suited for the downlink and uplink in satellite applications. The antenna can be designed to achieve a very high gain with a simple feeding structure using spiral microsip line, which can be integrated on a single-layered substrate. A theoretical framework for this type of antennas has been developed, which facilitates an efficient and fast design procedure requiring minimal computational resource. A prototype has been fabricated and measured, showing operating bandwidths (overlapped 10-dB return loss, 3-dB gain, 3-dB axial ratio bandwidths) of about 7% and 5%, realized broadside gains of 21.5 and 22 dBic at 12 and 14 GHz bands, respectively. This is an outstanding performance considering that the antenna profile is only 0.03 free-space wavelength (at 12 GHz) and the ratio between two operating frequencies is very tight accounting to only 1.17.
Original languageEnglish
Pages (from-to)343-352
Number of pages10
JournalIEEE Open Journal of Antennas and Propagation
Volume3
DOIs
Publication statusPublished - 22 Mar 2022

Keywords

  • Spirals
  • Microstrip
  • Microstrip antenna arrays
  • Antenna feeds
  • Dual band
  • Couplings
  • Microstrip antennas
  • circular polarization
  • high gain
  • microstrip patch antenna
  • Archimedean spiral
  • satellite communications.
  • leaky-wave antenna
  • series-fed patch antenna
  • Antenna array

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