Fresnel Zone Plate and Ordinary Lens Antennas: Comparative Study at Focus And Thickness

This paper presents a 1x4 patch with a Fresnel zone plate (FZP) lens for 77-79 GHz application. The difference from the traditional, we used one component to implement the lens and chassis together to reduce the design complexity and increase cost efficiency. The lens utilizes the concept of a Fresnel zone plate (FZP) to generate perforations with different dielectric constant regions in resin to achieve proper phase compensation. The lens is composed of three equivalent dielectric regions to compensate for the phase of electromagnetic. The full wave simulation results show that the peak gain of the FZP Lens could increase of 5.8 dB in the broadside direction compared with the resin chassis.