Wideband circularly polarised cavity backed monopole antenna for global navigation satellite systems
503 - 512
IET Microwaves, Antennas and Propagation
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The Institution of Engineering and Technology. This study presents a single-feed wideband circularly polarised (CP) monopole antenna backed with a cavity for the application in global navigation satellite systems (GNSSs). The measured results indicate that it has a -10 dB impedance bandwidth of 75.02% from 1.062 to 2.337 GHz and a 3 dB axial ratio bandwidth of 67.40% from 1.21 to 2.44 GHz. The proposed antenna was tested and validated on a multi-mode GNSS receiver in open field. In addition, extensive analysis conducted on the preliminary antenna's operation has revealed that the 'frequency independence' of phase difference between two orthogonal electric field components is crucial to a wide CP bandwidth. It is anticipated that the design principle and procedure of the proposed antenna can be extended to the development of other wideband CP antennas.
AuthorsHu, S; Chen, X; Zhao, D; Yao, Y
- College Publications