Design and improvement of pattern quality in circularly polarised slot array antenna for direct broadcast satellite applications

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

1 Citation (Scopus)

Abstract

A circularly polarised radial line slot array antenna (CP-RLSA) is proposed in this paper for direct broadcast satellite applications. A new design suggestion has been introduced and investigated in this study to improve the performance and pattern quality of the antenna. The antenna is composed of spiral rings on the top plate and made with several thousand of slot pairs. The antenna supports waveguide like structure which is composed of air cavity and dielectric materials. An antenna prototype operating at 20 GHz was designed and simulated. The experimental measurements and simulation results show that the antenna has successfully satisfied the required technical specification. The antenna has achieved a maximum gain of 32.2 dBic at 19.4 GHz. The CP-RLSA antenna has demonstrated an radiation efficiency of 95.3% and a total efficiency of 90.3% at 20 GHz. The antenna has also fulfilled the condition of circular polarisation, i.e. axial ratio is below 3-dB level with appropriate radiation patterns. At the operating frequency 20 GHz, the antenna has achieved a gain of 28.1 dBic with side lobe level as low as -14.4 dB.

Original languageEnglish
Title of host publication2nd International Conference on Electrical and Electronic Engineering ICEEE 2017
Subtitle of host publication27-29 December 2017
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)9781538633410, 9781538633397
ISBN (Print)9781538633403, 9781538633427
DOIs
Publication statusPublished - 2017
Event2nd International Conference on Electrical and Electronic Engineering, ICEEE 2017 - Rajshahi, Bangladesh
Duration: 27 Dec 201729 Dec 2017

Conference

Conference2nd International Conference on Electrical and Electronic Engineering, ICEEE 2017
CountryBangladesh
CityRajshahi
Period27/12/1729/12/17

Keywords

  • slot antenna
  • pattern quality
  • mobile DBS
  • circularly polarised
  • CP-RLSA

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