E-Thesis 247 views 329 downloads
Software Controlled Beam Steerable Antenna / Chandana Hasanga Goonesinghe
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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...
| Published: |
2018
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| Institution: | Swansea University |
| Degree level: | Doctoral |
| Degree name: | Ph.D |
| URI: | https://cronfa.swan.ac.uk/Record/cronfa43709 |
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| 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 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. |
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| Item Description: |
A selection of third party content is redacted or is partially redacted from this thesis. |
| Keywords: |
Software, beam steerable antenna |
| College: |
Faculty of Science and Engineering |