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master's thesis
Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta
2019. urn:nbn:hr:200:991668
Palčok, Juraj
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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Palčok, J. (2019). Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta (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:200:991668

Palčok, Juraj. "Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2019. https://urn.nsk.hr/urn:nbn:hr:200:991668

Palčok, Juraj. "Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, 2019. https://urn.nsk.hr/urn:nbn:hr:200:991668

Palčok, J. (2019). 'Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, accessed 27 January 2025, https://urn.nsk.hr/urn:nbn:hr:200:991668

Palčok J. Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek; 2019 [cited 2025 January 27] Available at: https://urn.nsk.hr/urn:nbn:hr:200:991668

J. Palčok, "Povećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information Technology Osijek, Osijek, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:200:991668

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Metadata
TitlePovećanje djelotvornosti oklapanja pozicioniranjem pasivnih reflektora unutar vodljivog kućišta
Title (english)Increasing the shielding efficiency by positioning the passive reflectors within the conductive box
AuthorJuraj Palčok
MentorSlavko Rupčić (mentor)
Committee memberSlavko Rupčić (predsjednik povjerenstva)
Committee memberVanja Mandrić Radivojević (član povjerenstva)
Committee memberAnđelko Lišnjić (član povjerenstva)
GranterJosip 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 country2019-10-10, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Radio Communications
Abstract
Elektromagnetsko oklapanje (eng. electromagnetic shielding) obuhvaća mjere koje se poduzimaju da bi utjecaj vanjskog elektromagnetskog polja unutar volumena oklopljenog kućištem bilo minimalno. Djelotvornost oklapanja (eng. shielding effectiveness - SE) je važan parametar koji utječe na elektromagnetsku kompatibilnost opreme. Utvrđuje se SE praktičnih metalnih kućišta uglavnom s njihovim otvorima. Fizikalna djelovanja koja djeluju na slabljenje elektromagnetskog vala mogu se interpretirati na tri dijela: gubici uslijed apsorpcije, gubici uslijed refleksije elektromagnetskog vala u metalnom oklopu (eng. reflection losses), i gubici uslijed višestrukih refleksija unutar metala metalnog oklopa. U ovome diplomskom radu su opisani i promatrani gubici uslijed višestrukih refleksija elektromagnetskog vala u zaštitnom oklopu. Djelotvornost oklapanja promatrana je u tri slučaja na kućištu izrađenom od bakra, dimenzija 300x300x120mm te debljine stjenke 1.5mm. Načinjena je analiza pozicioniranja vodljivih pregrada radi povećanja broja refleksija unutar definiranog kućišta. Broj pregrada je ograničen na maksimalno četiri pregrade. Izrađena je računalna simulacija u HFSS-u (eng. high-frequency structure simulator) sa različitim pozicijama i brojem pregrada. Faktor djelotvornosti oklapanja (SE) dobiven je omjerom parametara S21 bez metalnog oklopa i sa metalnim oklopom. Provedena je analiza rezultata te su predložena moguća poboljšanja faktora SE.
Abstract (english)
Electromagnetic shielding includes measures taken to minimize the impact of an external electromagnetic field within a shielded case. Shielding effectiveness (SE) is an important parameter that affects the electromagnetic compatibility of devices. Shielding effectiveness of usual metal housings is mainly determined on their apertures. The physical effects of electromagnetic wave attenuation can be interpreted in three parts: absorption losses, reflection losses in metal shielding, and losses due to multiple reflections within metal housing. This thesis describes and observes losses due to multiple reflections of an electromagnetic wave in a shielding case. Shielding effectiveness was observed in three cases on a copper made housing with size of 300x300x120mm and a wall thickness of 1.5mm. An analysis of the positioning of conductive barriers was performed to increase the number of reflections within the defined housing. The number of barriers is limited to a maximum of four barriers. A computer simulation is made using HFSS (high-frequency structure simulator) with different positions and number of barriers. Shielding effectiveness factor (SE) is obtained by the ratio of parameters S21 with no metal housing and with metal housing. Analysis of the results was performed and possible improvements to the SE factor were suggested.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:200:991668
Study programmeTitle: Graduate University Study Programme in Electrical Engineering; specializations in: Communications and Informatics, Power Engineering
Course: Communications and Informatics
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike (magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-12-17 08:28:31