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Abstract
A novel L-band circularly polarized (CP) microstrip antenna for low radar cross-section (RCS) application is proposed in this paper. A corner-cut squarer radiator is used to implement the CP radiation. The antenna RCS is effectively reduced by the special quasi-fractal structure on the ground plane. Its radiation and scattering performances are simulated and experimentally verified by being compared with those of a commonly used CP microstrip antenna which is chosen as a reference antenna. The results show that the proposed antenna has good radiation performances and lower RCS than the reference antenna. The proposed antenna serves as a good candidate in the design of CP antenna with the requirement of low RCS.
Acknowledgement
The authors would like to thank the financial support from the Fundamental Research Funds for the Central Universities (Hong Tao).