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E-Thesis 877 views 640 downloads

Software Controlled Beam Steerable Antenna / Chandana Hasanga Goonesinghe

Swansea University Author: Chandana Hasanga Goonesinghe

DOI (Published version): 10.23889/Suthesis.43709

Abstract

In this thesis I have presented a software controlled conformal beam steerable antennafor body wearable applications. The antenna is a square loop antenna conformal to ahemispherical shell. It generates 4 identical tilted beam patterns with high Directivity (9.2dBi). It has 4 RF ports which are conn...

Full description

Published: 2018
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa43709
first_indexed 2018-09-06T18:57:53Z
last_indexed 2025-04-04T04:16:17Z
id cronfa43709
recordtype RisThesis
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spelling 2025-04-03T12:27:27.4849304 v2 43709 2018-09-06 Software Controlled Beam Steerable Antenna 8684e36290ba80e3c8929e5f172535e6 NULL Chandana Hasanga Goonesinghe Chandana Hasanga Goonesinghe true true 2018-09-06 In this thesis I have presented a software controlled conformal beam steerable antennafor body wearable applications. The antenna is a square loop antenna conformal to ahemispherical shell. It generates 4 identical tilted beam patterns with high Directivity (9.2dBi). It has 4 RF ports which are connected to a RF switch which conducts the beamswitching based on the electronic voltages it receives from a control circuit. By switching oneport at a time, while keeping the remaining 3 ports open, it is able to steer the beam coveringthe full 360o azimuth range. An intelligent ’scan, analyse, lock and monitor’ algorithm hasbeen used to lock the antenna beam to the direction of the strongest signal. This algorithmruns on a portable hardware platform connected to the RF switch.The thesis findings cover a study on the conformal nature of this square loop antenna ona variety of doubly curved surfaces. Its limits on bending are reported. It then reports theresults of two experimental studies conducted to test the robustness of the beam switchingalgorithm. The first experiment involves using the antenna as a Base Station antenna whichdirects its beam towards a roaming mobile user based on the feedback it receives form theuser. The second experiment involves using the antenna as a mobile user while the BaseStation antenna is fixed. The algorithm switches ON the antenna’s 4 ports, one at a time,and then locks it to the port with the highest received signal strength. It was experimentallyproven that in a weak EM environment where the received signal strength is close to thenoise floor, the antenna running the beam switching algorithm was able to maintain highthroughput in a HD video call conferencing application while conventional methods failed. E-Thesis Software, beam steerable antenna 31 12 2018 2018-12-31 10.23889/Suthesis.43709 A selection of third party content is redacted or is partially redacted from this thesis. COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D Not Required 2025-04-03T12:27:27.4849304 2018-09-06T14:14:19.1981264 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Chandana Hasanga Goonesinghe NULL 1 43709__16353__cecdbeb193334e43a9c9853c0d58f4dd.pdf Goonsinghe_Chandana_ PhD thesis_Redacted.pdf 2020-01-17T16:09:29.4703246 Output 13403565 application/pdf Redacted version - open access true true eng
title Software Controlled Beam Steerable Antenna
spellingShingle Software Controlled Beam Steerable Antenna
Chandana Hasanga Goonesinghe
title_short Software Controlled Beam Steerable Antenna
title_full Software Controlled Beam Steerable Antenna
title_fullStr Software Controlled Beam Steerable Antenna
title_full_unstemmed Software Controlled Beam Steerable Antenna
title_sort Software Controlled Beam Steerable Antenna
author_id_str_mv 8684e36290ba80e3c8929e5f172535e6
author_id_fullname_str_mv 8684e36290ba80e3c8929e5f172535e6_***_Chandana Hasanga Goonesinghe
author Chandana Hasanga Goonesinghe
author2 Chandana Hasanga Goonesinghe
format E-Thesis
publishDate 2018
institution Swansea University
doi_str_mv 10.23889/Suthesis.43709
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
active_str 0
description In this thesis I have presented a software controlled conformal beam steerable antennafor body wearable applications. The antenna is a square loop antenna conformal to ahemispherical shell. It generates 4 identical tilted beam patterns with high Directivity (9.2dBi). It has 4 RF ports which are connected to a RF switch which conducts the beamswitching based on the electronic voltages it receives from a control circuit. By switching oneport at a time, while keeping the remaining 3 ports open, it is able to steer the beam coveringthe full 360o azimuth range. An intelligent ’scan, analyse, lock and monitor’ algorithm hasbeen used to lock the antenna beam to the direction of the strongest signal. This algorithmruns on a portable hardware platform connected to the RF switch.The thesis findings cover a study on the conformal nature of this square loop antenna ona variety of doubly curved surfaces. Its limits on bending are reported. It then reports theresults of two experimental studies conducted to test the robustness of the beam switchingalgorithm. The first experiment involves using the antenna as a Base Station antenna whichdirects its beam towards a roaming mobile user based on the feedback it receives form theuser. The second experiment involves using the antenna as a mobile user while the BaseStation antenna is fixed. The algorithm switches ON the antenna’s 4 ports, one at a time,and then locks it to the port with the highest received signal strength. It was experimentallyproven that in a weak EM environment where the received signal strength is close to thenoise floor, the antenna running the beam switching algorithm was able to maintain highthroughput in a HD video call conferencing application while conventional methods failed.
published_date 2018-12-31T04:58:01Z
_version_ 1863413380052680704
score 11.103096

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