All-dielectric compact superstrates for high-gain resonant-cavity antennas

designs and measurements

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

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

This paper presents the designs and measurements of two compact single-layer all-dielectric resonant-cavity antennas (RCAs). Both the antennas are compact (footprint < 5.5λ20) and low in profile (overall height < 0.9λ0). The first RCA consists of a single-layer partially reflecting superstrate (PRS) in which thickness and permittivity vary from the center towards the edge of the PRS. Four commercially available dielectric materials are used to achieve this permittivity variation. This RCA demonstrates a measured peak directivity of 20.7 dBi and its 3dB directivity bandwidth extends from 12.75-19 GHz, which is 57% at the center frequency. The second RCA, made out of a single dielectric material demonstrates a measured peak directivity of 20.3 dBi and its measured 3dB directivity bandwidth is 55.9%. This class of compact single-layer RCAs, with a directivity bandwidth product per unit area (DBP/A) of greater than 1200, successfully overcomes the trade-off between directivity, bandwidth, profile and footprint and breaks the challenging barrier that has existed for RCAs over the last decade (and other planar high-gain antennas).

Original languageEnglish
Title of host publication2019 URSI International Symposium on Electromagnetic Theory (EMTS)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-4
Number of pages4
ISBN (Electronic)9781946815064
ISBN (Print)9781538655931
DOIs
Publication statusPublished - 2019
Event2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019 - San Diego, United States
Duration: 27 May 201931 May 2019

Conference

Conference2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019
CountryUnited States
CitySan Diego
Period27/05/1931/05/19

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Cite this

Baba, A. A., Hashmi, R. M., Esselle, K. P., & Matekovits, L. (2019). All-dielectric compact superstrates for high-gain resonant-cavity antennas: designs and measurements. In 2019 URSI International Symposium on Electromagnetic Theory (EMTS) (pp. 1-4). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.23919/URSI-EMTS.2019.8931481