ABSTRACT
A family of multi-layer Fresnel Zone Plate (FZP) lenses is proposed to enhance the aperture efficiency, and suppress the backward radiation. In order to analyze the field distribution in the focal region of the lens, an improved full-wave analysis based on vector Hankel transform and spectral domain immittance matrix is developed. Various fundamental properties of FZP lens are given, these properties will provide guidance for designing a FZP lens antenna.
Notes
†This work is supported by National Natural Science Foundation of China Under the project No. 69571009.