Dual-band circularly polarized microstrip antenna

Jhe Sheng Yang, Jeen Sheen Row

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A design for dual-band circularly polarized microstrip antennas with different radiation patterns is described. The design is based on a stacked patch antenna composed of an upper circular patch and a lower ring patch. For the higher operation band, the two patches are simultaneously resonant at the TM21 mode and the stacked patch antenna can produce a conical radiation pattern. As for the lower operation band, only the upper patch is resonant at its fundamental mode and a broadside radiation pattern is obtained. To allow the two radiation patterns to be with circular polarization, 90° hybrid couplers are used to excite the patch antennas at the two operation bands. A prototype designed at the GPS and WLAN bands is constructed. The experimental results demonstrate that the prototype operated at each frequency band has a 3dB-axial-ratio bandwidth of more than 15%. Simulation performed with HFSS also validates the measured results.

Original languageEnglish
Pages (from-to)404-408
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume59
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Fingerprint

microstrip antennas
Microstrip antennas
patch antennas
Directional patterns (antenna)
radiation
Circular polarization
prototypes
Wireless local area networks (WLAN)
Frequency bands
Global positioning system
circular polarization
couplers
Bandwidth
bandwidth
rings
simulation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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abstract = "A design for dual-band circularly polarized microstrip antennas with different radiation patterns is described. The design is based on a stacked patch antenna composed of an upper circular patch and a lower ring patch. For the higher operation band, the two patches are simultaneously resonant at the TM21 mode and the stacked patch antenna can produce a conical radiation pattern. As for the lower operation band, only the upper patch is resonant at its fundamental mode and a broadside radiation pattern is obtained. To allow the two radiation patterns to be with circular polarization, 90° hybrid couplers are used to excite the patch antennas at the two operation bands. A prototype designed at the GPS and WLAN bands is constructed. The experimental results demonstrate that the prototype operated at each frequency band has a 3dB-axial-ratio bandwidth of more than 15{\%}. Simulation performed with HFSS also validates the measured results.",
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Dual-band circularly polarized microstrip antenna. / Yang, Jhe Sheng; Row, Jeen Sheen.

In: Microwave and Optical Technology Letters, Vol. 59, No. 2, 01.02.2017, p. 404-408.

Research output: Contribution to journalArticle

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