prikaz prve stranice dokumenta Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa
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master's thesis
Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa
2024. urn:nbn:hr:200:478941
Rendić, Ana
Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Communications
Chair of Multimedia Systems and Digital Television

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Rendić, A. (2024). Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek. Retrieved from https://urn.nsk.hr/urn:nbn:hr:200:478941

Rendić, Ana. "Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2024. https://urn.nsk.hr/urn:nbn:hr:200:478941

Rendić, Ana. "Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2024. https://urn.nsk.hr/urn:nbn:hr:200:478941

Rendić, A. (2024). 'Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:200:478941

Rendić A. Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2024 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:200:478941

A. Rendić, "Linearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:200:478941

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Metadata
TitleLinearni antenski niz dizajniran primjenom funkcije izoštrenog uzdignutog kosinusa
Title (english)Linear sharpened raised-cosine antenna array
AuthorAna Rendić
MentorSnježana Rimac-Drlje (mentor)
Committee memberSnježana Rimac-Drlje (predsjednik povjerenstva)
Committee memberSlavko Rupčić (član povjerenstva)
Committee memberVanja Mandrić (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
(Department of Communications)
(Chair of Multimedia Systems and Digital Television)
Osijek
Defense date and country2024-10-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Radio Communications
Abstract
Ovaj diplomski rad se bavi dizajnom antenskih nizova s uskim dijagramom zračenja. Prilikom dizajna linearnih antenskih nizova koriste se metode identične metodama za dizajn digitalnih FIR filtara, kao što je metoda prozora. Opisana je primjena Dolph-Chebyshevljeva prozora koji se konstruira uz pomoć Chebyshevovih polinoma. Prozor je definiran tako da njegove bočne latice odgovaraju dijelu Chebyshevovog polinoma s jednakim oscilacijama. Dodavanje faznog zakreta omogućava usmjeravanje zraka antenskog niza u željenom pravcu. Nadalje, opisana je metoda za dizajn oštrih FIR filtara s brzim padom prijenosne karakteristike prema zapornom području primjenom aproksimacije dijagrama zračenja Fourierovim redom i minimizacijom srednjeg kvadratnog odstupanja aproksimacije od željenog dijagrama. Navedena metoda se temelji na frekvencijskom odzivu dobivenom polinomskim izoštravanjem prijelaznog pojasa s funkcijom uzdignutog kosinusa. U ovom radu je predstavljen opis dizajna FIR filtara s izoštrenim amplitudnim odzivom uzdignutog kosinusa, koja omogućava izravnu kontrolu prijelaznog pojasa filtra i poboljšava lokalizaciju odziva u vremenu. Prikazana je primjena ovih filtara u sustavima za maskiranje frekvencijskog odziva, čime se postiže optimizacija za uske i široke prijelazne pojaseve te preciznije usmjeravanje antenskog niza.
Abstract (english)
This final thesis deals with the design of antenna arrays with a narrow beampattern. When designing linear antenna arrays, methods identical to those for designing digital FIR filters, such as the window method, are used. The application of the Dolph-Chebyshev window, which is constructed with the help of Chebyshev polynomials, is described. The window is defined so that its side lobes correspond to the part of the Chebyshev polynomial with equal oscillations. Adding a phase shift enables the beam of the antenna array to be directed in the desired direction. Furthermore, a method is described for the design of sharp FIR filters with a rapid drop in the transmission characteristic towards the blocking region by applying the Fourier series approximation of the radiation diagram and minimizing the mean square deviation of the approximation from the desired diagram. The mentioned method is based on the frequency response obtained by polynomial sharpening of the transition band with the raised cosine function. The paper also includes a description of the design of an FIR filter with a sharpened raised cosine amplitude response, which allows direct control of the filter transition band and improves the localization of the response in time. The application of these filters in frequency response masking systems is presented, which achieves optimization for narrow and wide transition bands and more precise routing of the antenna array.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:478941
Study programmeTitle: Graduate university study programme in Electrical Engineering (branches: Power Engineering and Communications and Informatics; specializations in: Engineering, Power Engineering and Communications, Communications and Informatics
Course: Engineering
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka elektrotehnike (sveučilišni/a magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2024-10-31 10:20:52