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master's thesis
Maksimalno glatki prostorni filtri
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2020. urn:nbn:hr:168:277134
Jelavić Šako, Andrea
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Jelavić Šako, A. (2020). Maksimalno glatki prostorni filtri (Master's thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:277134

Jelavić Šako, Andrea. "Maksimalno glatki prostorni filtri." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2020. https://urn.nsk.hr/urn:nbn:hr:168:277134

Jelavić Šako, Andrea. "Maksimalno glatki prostorni filtri." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2020. https://urn.nsk.hr/urn:nbn:hr:168:277134

Jelavić Šako, A. (2020). 'Maksimalno glatki prostorni filtri', Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 12 December 2024, https://urn.nsk.hr/urn:nbn:hr:168:277134

Jelavić Šako A. Maksimalno glatki prostorni filtri [Master's thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2020 [cited 2024 December 12] Available at: https://urn.nsk.hr/urn:nbn:hr:168:277134

A. Jelavić Šako, "Maksimalno glatki prostorni filtri", Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:168:277134

Metadata
TitleMaksimalno glatki prostorni filtri
Title (english)Maximally Flat Spatial Filters
AuthorAndrea Jelavić Šako
MentorGoran Molnar (mentor)
Committee memberGoran Molnar (predsjednik povjerenstva)
Committee memberMladen Vučić (član povjerenstva)
Committee memberDamir Seršić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2020-07-10, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Prostorno razmaknute antene po unaprijed danom rasporedu predstavljaju prostorne filtre. Najpoznatiji raspored je uniformna razdioba antena na pravcu. Takvi prostorni filtri nazivaju se uniformni antenski nizovi. Najčešći pristup u dizajnu uskokutnih uniformnih antenskih nizova je onaj primjenom metode otvora. U ovom pristupu, posebna pažnja se posvećuje otvorima s malim dinamičkim rasponom koeficijenata te otvorima čiji dijagrami zračenja imaju danu razinu bočnih latica. Korištenjem metode otvora, u ovom radu predložene su dvije klase prostornih filtara koje se temelje na maksimalno glatkoj aproksimaciji u prostornoj i azimutnoj domeni. Za klasu filtara temeljenu na aproksimaciji u prostornoj domeni, dan je jednostavan postupak za dizajn maksimalno glatkog otvora koji za dani dinamički raspon koeficijenata daje dijagram zračenja s najmanjom razinom bočnih latica. Za klasu filtara temeljenu na aproksimaciji u azimutnoj domeni, dan je analitički postupak za dizajn otvora koji za danu razinu bočnih latica daje glavnu laticu s maksimalno glatkim vrhom te prihvatljivim dinamičkim rasponom koeficijenata. Za obje klase maksimalno glatkih filtara, određene su njihove značajke te su uspoređene sa značajkama postojećih prostornih filtara.
Abstract (english)
According to a predetermined arrangement, spatially distanced antennas represent spatial filters. The most common arrangement is uniformly distanced antennas. These types of spatial filters are called uniform linear antenna arrays. The most common approach in the design of narrowband uniform antenna arrays is one using the windowing method. In this approach, special attention is dedicated to windows with small dynamic range ratio values and the ones whose radiation pattern has a predetermined sidelobe level. The methods proposed in this paper are two classes of spatial filters based on maximally flat approximation in spatial and azimuth domain. The approximation in the spatial domain implies the design of a maximally flat top which for a given DRR gives a minimum sidelobe level. For the filters based on approximation in azimuth domain, the design is based on a window which for a given sidelobe level achieves a flat top of the main lobe and satisfactory DRR. For both classes of maximally flat filters, the main features were determined and compared with the features of existing space filters.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:277134
Study programmeTitle: Electrical Engineering and Information Technology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
Type of resourceText
File originBorn digital
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Created on2023-01-13 10:05:57