Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 69, Issue 10, Pages 6294-6301Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2021.3076258
Keywords
Lenses; Focusing; Refractive index; Nonhomogeneous media; Time-domain analysis; Optics; Mathematical model; Circular lens; elliptical lens; finite-difference time-domain (FDTD) methods; flat lens; optical devices; ray trajectories in inhomogeneous media
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This article presents types of broadband focusing lens in the Ku-band using the ray inserting method, achieving good matching performance and wide bandwidth. Experimental results confirm the designed lens's performance in a wide frequency range.
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.
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