A Compact Broadband Circularly Polarized Slot Antenna for Universal UHF RFID Reader and GPS

A novel compact printed broadband circularly polarized slot antenna is proposed in this paper. The antenna consists of an inverted L-shaped coplanar waveguide feed structure and a square ground plate loaded with three rectangular slots. The antenna achieves good impedance matching and circular polar...

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Bibliographic Details
Published in:Applied Computational Electromagnetics Society journal 2021-05, Vol.36 (5), p.589-595
Main Authors: Chen, Canjie, Feng, Quanyuan
Format: Article
Language:English
Subjects:
Access control
Antennas
Bandwidths
Broadband
Circular polarization
Coplanar waveguides
Global positioning systems
GPS
Impedance matching
Polarization characteristics
Radio frequency identification
Simulation
Slot antennas
Ultrahigh frequencies
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Description
Summary:A novel compact printed broadband circularly polarized slot antenna is proposed in this paper. The antenna consists of an inverted L-shaped coplanar waveguide feed structure and a square ground plate loaded with three rectangular slots. The antenna achieves good impedance matching and circular polarization characteristics by adjusting the size of the L-shaped band and the rectangular slot. The simulation results show that the antenna has a 10-dB impedance bandwidth of 1360 MHz (690-2050 MHz) and a 3 dB axial ratio (AR) bandwidth of 490 MHz (770-1260 MHz). Additionally, the maximum gain reached 4.02 dBi. The antenna proposed in this paper can be applied to UHF RFID and GPS frequency bands.
ISSN:1054-4887
1054-4887
1943-5711
DOI:10.47037/2020.ACES.J.360513