Imaging performance of hyperbolic lens/extended hemispherical lens with small F-number at millimeter wavelengths

The ray tracing method and vectorial Stratton-Chu diffraction Integration are applied in the analysis of the imaging performance over the focal planes of hyperbolic lens and reverse microscope lens system with small F-number. This method is proved to be effective by the correspondence between simulated result and experimental data. It is found that adding an extended hemispherical lens to the hyperbolic lens can improve the imaging performances. The field curvature phenomenon is studied and the effect of frequency is also analyzed. An image of a reverse L type object simulated with the above method is presented.