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 language | English |
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Pages (from-to) | 6800-6805 |
Number of pages | 6 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 68 |
Issue number | 9 |
Early online date | 9 Jun 2020 |
DOIs | |
Publication status | Published - Sep 2020 |
Keywords
- Circularly polarized (CP) antenna
- miniaturization
- patch antenna
- sunshine-shaped slotted patch
- sunshine-shaped slotted radiating patch
ASJC Scopus subject areas
- Electrical and Electronic Engineering