Sidelobe suppression in resonant cavity antennas through near-field analysis

Affan A. Baba, Raheel M. Hashmi, Karu P. Esselle, Andrew R. Weily, Ladislau Matekovits

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)

Abstract

This paper describes an effective approach to reduce the high sidelobe levels (SLLs) in resonant cavity antennas (RCAs) with small footprints. The objective is to first understand the reason behind the high SLL in compact RCAs and than improve its radiation characteristics. For this, a near-field to far-field transformation routine is implemented in MATLAB, which allows to understand the individual effects of near-field amplitude and phase distributions on the SLL in the far-field patterns. This approach resulted in an optimal electric-field distribution, which is realized by a dielectric partially reflecting superstructure (PRS) exhibiting a broadside directivity of 19.5 dBi with significantly low sidelobe levels of -30dB in both the principle planes. It is important to note that the proposed approach can be linked easily with global optimization techniques to fit the radiation patterns within specific pattern masks.

Original languageEnglish
Title of host publicationProceedings of the 2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages359-361
Number of pages3
ISBN (Electronic)9781538667620, 9781538667613
ISBN (Print)9781538667637
DOIs
Publication statusPublished - 2018
Event20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018 - Cartagena de Indias, Colombia
Duration: 10 Sep 201814 Sep 2018

Conference

Conference20th International Conference on Electromagnetics in Advanced Applications, ICEAA 2018
CountryColombia
CityCartagena de Indias
Period10/09/1814/09/18

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