Radiation Sidelobe Reduction and Focus Properties of Reflector Antennas by Grating the Aperture Field via Non-Periodic Fresnel Zone Plate Lens
Journal
IEEE Transactions on Antennas and Propagation
Journal Volume
66
Journal Issue
5
Pages
81-89
Date Issued
2018
Author(s)
Abstract
The radiation characteristics of reflector antenna are investigated when its aperture field is grated by using a nonperiodic Fresnel-zone plate lens (FZPL). The focus of study intends to develop a theoretic foundation such that the radiating slot rings can be adjusted to reduce the sidelobes. In particular, the results of slot ring radiation may reduce to the radiation of a 1-D unequally spaced radiating sources. This reduction allows one to employ the conventional array theories of unequally spaced elements to determine the configuration of FZPL. Theoretic formulation as well as demonstrating examples is presented to validate the concept.
SDGs
Type
journal article