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master's thesis
Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage
2022. urn:nbn:hr:179:061331
Rajič, Ivana
University of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
Department of Electronics and Computing

Cite this document

Rajič, I. (2022). Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage (Master's thesis). Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:179:061331

Rajič, Ivana. "Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:179:061331

Rajič, Ivana. "Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:179:061331

Rajič, I. (2022). 'Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage', Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:179:061331

Rajič I. Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage [Master's thesis]. Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture; 2022 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:179:061331

I. Rajič, "Konjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage", Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:179:061331

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Metadata
TitleKonjugirano-kompleksno prilagođenje HF sustava za bežični prijenos snage
Title (english)Conjugate-complex adjustment in HF systems for wireless power transmission
AuthorIvana Rajič
MentorZoran Blažević https://orcid.org/0000-0001-5405-8003 (mentor)
GranterUniversity of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
(Department of Electronics and Computing)
Split
Defense date and country2022-09-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Telecommunications and Informatics
Abstract
Zadatak ovog rada je proučiti prijenos snage i frekvencijsku karakteristiku između dviju električki malih antena spregnutih u bliskom bolju, pri čemu je fokus na objašnjenju fenomena frekvencijskog razdvajanja i prikazu ovisnosti prijenosa snage o međusobnoj udaljenosti antena. U uvodnom dijelu rada opisan je povijesni razvoj bežičnih sustava i razlozima upotrebe. U narednim poglavljima obrađena je fizikalna i teorijska osnova potrebna za razumijevanje samog projekta, načini prilagođenja antena u bliskom polju te je potom objašnjen dizajn i realizacija samog sustava za mjerenje. U programskom paketu MATLAB je izrađeno konjugiranokompleksno prilagođenje primjenom adaptivnih LC-mreža na rezonantnoj frekvenciji od 13,56 MHz, te su dobiveni rezultati potom obrađeni u svrhu izračuna prijenosa snage i analize frekvencijske karakteristike. Taj isti slučaj je prikazan na praktičnoj izvedbi antena koje su u rezonanciji. Usporednom analizom oba mjerenja može se zaključiti da je optimalni prijenos snage postignut pri udaljenostima gdje je sustav kritično spregnut, odnosno jednostavnije rečeno, pri udaljenostima gdje su antene dovoljno blizu da su gubitci u prijenosu snage minimalni, ali dovoljno udaljene da ne dolazi do frekvencijskog razdvajanja. Analizom karakteristika dolazi se do zaključka da konjugirano kompleksno prilagođenje kompleksnije, ali daje teoretski najveće performanse.
Abstract (english)
The task of this work is to study the power transfer and frequency characteristics between two electrically small antennas coupled in close proximity, where the focus is on explaining the phenomenon of frequency separation and showing the dependence of power transfer on the mutual distance of the antennas. The introductory part of the paper describes the historical development of wireless systems and the reasons for their use. In the following chapters, the physical and theoretical basis necessary for understanding the project itself, the ways of adjusting the antennas in the near field, and then the design and implementation of the measurement system itself are explained. Conjugate-complex adjustment was made in the MATLAB software package using adaptive LC-networks at the resonant frequency of 13.56 MHz, and the obtained results were then processed for the purpose of power transfer calculation and frequency characteristic analysis. This same case is shown in the practical implementation of antennas that are in resonance. Through a comparative analysis of both measurements, it can be concluded that the optimal power transmission is achieved at distances where the system is critically coupled, that is, in simpler terms, at distances where the antennas are close enough that losses in power transmission are minimal, but far enough away that frequency separation does not occur. The analysis of the characteristics leads to the conclusion that conjugated complex adjustment is more complex, but theoretically gives the highest performance.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:179:061331
Study programmeTitle: Communications and Information Technology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka komunikacjske i informacijske tehnologije (magistar/magistra inženjer/inženjerka komunikacjske i informacijske tehnologije)
Type of resourceText
File originBorn digital
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Created on2023-06-20 12:23:47