Comparison between fully and partially filled dielectric materials on the waveguide of circularly polarised radial line slot array antennas

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Abstract

This paper presents an investigation on the waveguide of circularly polarised radial line slot array (RLSA) antennas to improve gain and radiation bandwidth. Two circularly polarised (CP) RLSA antennas were designed with two different waveguide configurations. In the first configuration the waveguide is fully filled with dielectric materials and in the second configuration the waveguide is partially filled with dielectric materials and rest of the waveguide is filled with air. Numerical results of these two CP-RLSA antennas with two different waveguide configurations are presented and compared. Significant improvements have been made in the 3-dB directivity bandwidth and aperture efficiency of the antenna having waveguide partially filled with dielectric material. The 3-dB directivity bandwidth was measured 6.2% and aperture efficiency increased to 55.5%. The CP-RLSA antenna has also achieved a peak directivity of 31.7 dBic and a gain of 31.2 dBic as compared to the directivity 30.1 dBic and gain 29.5 dBic, respectively achieved with the CP-RLSA antenna having waveguide fully filled with dielectric material.

Original languageEnglish
Title of host publication2020 International Workshop on Antenna Technology (iWAT)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9781728126401, 9781728126395
ISBN (Print)9781728126418
DOIs
Publication statusPublished - 2020
Event2020 International Workshop on Antenna Technology, iWAT 2020 - Bucharest, Romania
Duration: 25 Feb 202028 Feb 2020

Conference

Conference2020 International Workshop on Antenna Technology, iWAT 2020
CountryRomania
CityBucharest
Period25/02/2028/02/20

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