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

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

doi:10.1109/TAP.2020.2999663

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 language	English
Journal	IEEE Transactions on Antennas and Propagation
Early online date	9 Jun 2020
DOIs	https://doi.org/10.1109/TAP.2020.2999663
Publication status	E-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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10.1109/TAP.2020.2999663

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Lu, J., Zhang, H. C., Wei, C., Hong, J-S., & Cui, T. J. (2020). Design of Compact Circularly Polarized Antenna Using Sunshine-Shaped Slotted Patch. IEEE Transactions on Antennas and Propagation. https://doi.org/10.1109/TAP.2020.2999663

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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.",

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",

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AU - Cui, Tie Jun

PY - 2020/6/9

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AB - 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.

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