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Reconfigurable microstrip filter with continuous coupling and frequency tunability
Thesis (MEng)--Stellenbosch University, 2021.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2021
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| _version_ | 1867614005777924096 |
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| access_status_str | Open Access |
| author | Kotze, Alwyn |
| author2 | Meyer, Petrie |
| author_browse | Kotze, Alwyn Meyer, Petrie |
| author_facet | Meyer, Petrie Kotze, Alwyn |
| author_sort | Kotze, Alwyn |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2021. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/123800 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:45:09.986Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/123800 Reconfigurable microstrip filter with continuous coupling and frequency tunability Kotze, Alwyn Meyer, Petrie Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Frequency changers UCTD Communication system Electric resonators Reconfigurable microstrip filter Thesis (MEng)--Stellenbosch University, 2021. ENGLISH ABSTRACT: For the modern communication system, adaptability is an essential requirement to remain relevant in the current day and age. This project focuses on the implementation of a varactor structure to provide a method of controlling the coupling in coupled-resonator filters. This will allow a single filter to preform the task of multiple set bandwidth filters and allow a single filter to adapt to new requirements when needed. The coupling structure in this project is used to limit the magnetic coupling strength so that the dominant coupling type is electrical and uses the structure placement and choice of resonator to achieve the required tuning range. The coupling structure can control the pass-band bandwidth to change from 300 MHz to 600 MHz with a center frequency tuning range of 2 -3.5 GHz and 3.36 to 2.75 GHz. This project uses ideal transmission line models and simulation software like CST and AWR to determine the characteristics of the filter. The coupling structure adds an insertion loss zero and pole. By means of good design choices the pole can limit the zeros' influence on the pass-band. Measurements show that the models predicted the characteristics with good accuracy, however an increase in loss due to the varactor is observed in measurement. The project did show that the use of the varactor structure provides a good method of controlling the coupling strength AFRIKAANSE OPSOMMING: Vir die moderne kommunikasiestelsel is aanpasbaarheid 'n noodsaaklike vereiste om op die huidige tyd relevant te bly. Die projek fokus op die implementering van 'n varaktorstruktuur om 'n metode te bied om die koppelsterkte in gekoppelde resonerende filter te beheer. Die koppelstruktuur word gebruik om die magnetiese koppelsterkte te beperk sodat die dominante koppelingstipe elektries is. Die in- vloed van die plasing van die koppelstruktuur op 'n mikrostrook resoneerder sal getoets en bespreek word om te bepaal wat nodig is vir 'n spesifieke verstelbaar- heid. Die koppelstruktuur kan die deurlaatband reguleer om van 300 MHz na 600 MHz met die middel frekwensie verstelbarheid van 2 -3.5 GHz en 3.36 to 2.75 GHz. Hierdie projek maak gebruik van ideale transmissielyn modelle en simulasiesagte- ware soos CST en AWR om die eienskappe van die filter akkuraat te bepaal. Die koppelstruktuur wys dat dit 'n invoegverlies zero en pool toevoeg, en met goeie ontwerpkeuses kan die pole die invloed van die zero op die deurlaatband beperk. Metings toon dat die modelle die eienskappe met goeie akkuraatheid voorspel het, maar as gevolg van die varaktormodel wat vir hierdie projek gebruik word, is die verlies meer in werklikheid as in simulasie. Die projek het getoon dat die gebruik van die varaktorstruktuur 'n goeie metode bied om die koppelsterkte te beheer. Masters 2021-11-19T08:17:41Z 2021-12-22T14:22:09Z 2021-11-19T08:17:41Z 2021-12-22T14:22:09Z 2021-12 Thesis http://hdl.handle.net/10019.1/123800 en_ZA Stellenbosch University 77 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Frequency changers UCTD Communication system Electric resonators Reconfigurable microstrip filter Kotze, Alwyn Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title | Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title_full | Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title_fullStr | Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title_full_unstemmed | Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title_short | Reconfigurable microstrip filter with continuous coupling and frequency tunability |
| title_sort | reconfigurable microstrip filter with continuous coupling and frequency tunability |
| topic | Frequency changers UCTD Communication system Electric resonators Reconfigurable microstrip filter |
| url | http://hdl.handle.net/10019.1/123800 |
| work_keys_str_mv | AT kotzealwyn reconfigurablemicrostripfilterwithcontinuouscouplingandfrequencytunability |