Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja

Kuprešak, Marko

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undergraduate thesis

Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja

2017. urn:nbn:hr:200:566617

Kuprešak, Marko

Josip Juraj Strossmayer University of Osijek
Faculty of Electrical Engineering, Computer Science and Information Technology Osijek
Department of Communications
Laboratory for High Frequency Measurements

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APA 6th Edition

Kuprešak, M. (2017). Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja (Undergraduate 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:200:566617

MLA 8th Edition

Kuprešak, Marko. "Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2017. https://urn.nsk.hr/urn:nbn:hr:200:566617

Chicago 17th Edition

Harvard

Kuprešak, M. (2017). 'Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 18 April 2024, https://urn.nsk.hr/urn:nbn:hr:200:566617

Vancouver

Kuprešak M. Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2017 [cited 2024 April 18] Available at: https://urn.nsk.hr/urn:nbn:hr:200:566617

IEEE

M. Kuprešak, "Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:200:566617

Cite this item: https://urn.nsk.hr/urn:nbn:hr:200:566617

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Title	Proračun jakosti električnog polja u dalekom polju radio-frekvencijskog zračenja
Title (english)	Calculation of the Electric Field Strength in the Far Field of the Radio-Frequency Radiation
Author	Marko Kuprešak
Mentor	Snježana Rimac-Drlje (mentor)
Committee member	Snježana Rimac-Drlje (predsjednik povjerenstva)
Committee member	Zdravko Krpić (član povjerenstva)
Committee member	Marijan Herceg (član povjerenstva)
Granter	Josip Juraj Strossmayer University of Osijek Faculty of Electrical Engineering, Computer Science and Information Technology Osijek (Department of Communications) (Laboratory for High Frequency Measurements) Osijek
Defense date and country	2017-09-11, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Electrical Engineering Radio Communications
Abstract	U ovom radu obrađene su teorijske osnove širenja radiovala slobodnim prostorom, definirane su granice između bliskog i dalekog polja radio–frekvencijskog zračenja te su predstavljeni modeli za računanje električnog polja. Pojašnjeni su geometrijski proračuni korišteni u radu za proračun udaljenosti pomoću zadanih koordinata između odašiljača i ispitnog mjesta, te za proračun elevacijskih i azimutnih kutova. Kreiran je Matlab program koji za zadane parametre antene i zadane koordinate računa polje i gustoću snage na pojedinim mjestima. Za podatke o dijagramima zračenja antena, koji su korišteni u programu, izrađene su Excel tablice. Program na osnovu kutova iščita dobitke, na temelju koordinata odašiljačke antene i ispitnog mjesta određuje udaljenosti između njih te proračunava jakost električnog polja i gustoću snage ne nekom ispitnom mjestu. Proračuni se vrše za GSM i LTE antene koje zajedno čine jedan odašiljački sustav, u ovom radu su obrađena dva takva sustava. Uspoređene su jakosti električnog polja za odabrane antene iz čega se došlo do zaključka da se odluka o odabiru antene ne može donijeti samo na temelju dijagrama zračenja nego je potrebno izvršiti proračune i simulacije kako bi se utvrdilo da li određena antena zadovoljava postavljene uvjete.
Abstract (english)	In this paper theoretical basis for the propagation of the radio wave in free space is covered, the boundaries between the near and the far field radio–frequency radiation are defined and models for calculating electric fields are presented. The geometric calculations used for distance calculation between transmitter and test location defined by the coordinates, as well as calculations for azimuth and elevation angle were explained. A Matlab program was created for calculation of the electric field and power density in measuring points using given antenna parameters and coordinates. It was necessary to create Excel tables which handled numerical data for the antenna radiation pattern. Program reads gains off from Excel tables by using previously calculated angles, calculates distance between given transmitter and test spot by using their coordinates and finally calculates electric field strength and power density on the test spot. Calculations for GSM and LTE antennas which together make transmission system were made. In this paper two of those systems are covered. Electric field strength for given antennas were compared and conclusion was made that the decision about antenna selection can’t be made based on antenna radiation pattern only but it is necessary to do calculations and simulations to determine does the given antenna meets required conditions.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:200:566617
Study programme	Title: Undergraduate University Study Programme Study programme type: university Study level: undergraduate Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike)
Type of resource	Text
File origin	Born digital
Access conditions	Open access
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Created on	2017-11-07 14:50:43