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Wide-scan dielectric dome antenna with reduced profile

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Author: Gandini, E. · Silvestri, F. · Benini, A. · Gerini, G. · Martini, E. · Maci, S. · Viganò, M.C. · Toso, G. · Monni, S.
Type:article
Date:2017
Source:38th ESA Antenna Workshop on Innovative Antenna Systems and Technologies for Future Space Missions 3-6 October 2017, Noordwijk, The Netherlands
Identifier: 783208
Keywords: 2015 Observation, Weapon & Protection Systems 2015 Nano Technology · RT - Radar Technology OPT - Optics · TS - Technical Sciences

Abstract

In this contribution, a dielectric dome antenna design in Ka-band is presented. The dome antenna is based on the combination of a phased array and a dielectric lens. The goal of the combination of these structures is to enlarge the field of view of the antenna. In particular, the array is considered to be able to scan up to 60º and the lens is used to enhance the field of view up to 80º. To this end, the optimization variables of the antenna are the shape of the dielectric lens, its thickness, its dielectric constant and the phase distribution over the array. The optimization procedure is based on a ray-tracing technique. In order to quantify the performance of the dome antenna, a physical optics code was developed to calculate the radiation patterns. The results show good quality patterns over the considered scanning range. The dielectric dome solution is not frequency dependent, and therefore, the bandwidth of the antenna will only be limited by the phased array.