The Focusing Lens Design in Ku-Band Using Ray Inserting Method (RIM)

摘要

In this article, types of broadband focusing lens are presented based on the ray inserting method (RIM) in the Ku-band. The realizable inhomogeneous isotropic dielectric media is obtained to converge wavefront produced by a source on a focal point. The proposed three lenses are broadband because of good matching to the source and the surroundings. The finite-difference time-domain (FDTD) scheme and the full-wave simulation are used to confirm the results in the Ku-band. To validate designed lenses' performance, the circular focusing lens is realized and fabricated. The results of simulations and experiments indicate good performances of the designed lens in the wide frequency bandwidth.