Odjel za antene i širenje elektromagnetskih valova
Odjel za teoriju i primjenu mikrovalova (MTT), Odjel za antene i širenje elektromagnetskih valova (APS), Združeni odjel AES i GRS, Odjel komunikacijskih sustava HATZ te Zavod za radiokomunikacije Fakulteta elektrotehnike i računarstva pozivaju vas na predavanje
Metasurface cavity antennas
koje će održati Mario Martinis, PhD, University of Rennes 1 (Francuska), u utorak 25. studenog 2014. u 14:30 sati u dvorani B5.
Sažetak predavanja i životopis predavača pogledajte u nastavku obavijesti.
Cavity type antennas have been analysed and used in practice since the middle of the 20th century. However, these antennas were usually electrically large. In recent decades, research interest has turned to microstrip patch antennas enclosed in cavities which can be electrically small. Unfortunately, a consequence of placing antennas in small cavities is a significant reduction of bandwidth. The intention of this lecture is to answer the question: Can the bandwidth of cavity type antennas be improved and how? To this end, a new theoretical limit on bandwidth of cavity antennas is derived and it is shown that patch antennas, used so far, do not present the best choice. Finally, a new antenna design, involving metasurfaces, is presented and shown to be the optimal choice. Prototypes of new metasurface cavity antennas reaching the theoretical limits are shown to demonstrate the feasibility of such antennas in practice.
Mario Martinis was born in Zagreb, Croatia in 1985. He received Dipl. Ing. degree in electrical engineering from University of Zagreb, Croatia in 2008. He was working as an engineer for dedicated host computers untill 2011. In 2011, he enrolled in a PhD program in electronics and telecommunications at University of Rennes 1, France and obtained a PhD degree in 2014. His research interest includes applied electromagnetics, antennas, metamaterials, microwave measurements and microwave engineering. He is an author of several conference and journal papers on metamaterials and cavity antennas