Design of Compact Circularly Polarized Antenna Using Sunshine-Shaped Slotted Patch

Jiayuan Lu, Hao Chi Zhang, Cunyue Wei, Jia-Sheng Hong, Tie Jun Cui

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Abstract

We propose a method to design compact circularly polarized (CP) antenna using a novel sunshine-shaped slotted radiating patch, which exhibits slow-wave and other interesting properties. The structured radiating patch introduces adjustable coupling between a pair of orthogonal modes (TM10 mode and TM01 mode) to facilitate good axial ratio and reflection parameters of the antenna simultaneously in the radiating frequency band. A π/2 balun is employed to excite the TM10 and TM01 modes by using back feeding structure. Based on the proposed method, a compact left-hand CP antenna is designed, fabricated, and measured to verify the feasibility of the design method. The whole antenna is 0.17λ0×0.17λ0 in dimension (λ0 is the wavelength in free space) and the measured maximum gain is 5dBic in the working band, and 3-dB axial ratio (AR) bandwidth is 0.4% for left-hand CP.
Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
Early online date9 Jun 2020
DOIs
Publication statusE-pub ahead of print - 9 Jun 2020

Keywords

  • Antenna measurements
  • Couplings
  • Dielectrics
  • Propagation constant
  • Resonant frequency
  • Slot antennas
  • Sunshine-shaped slotted patch
  • circularly polarized antenna
  • miniaturization
  • patch antenna
  • sunshine-shaped slotted radiating patch

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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