Substrate Integrated Waveguide Based Metamaterial Components and Novel Miniaturized Planar Antennas
May 17, 2012
from 01:00 PM to 03:00 PM
|Where||Engr. IV Bldg., Faraday Room 67-124|
|Contact Name||Yuandan Dong|
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Advisor: Tatsuo Itoh
Miniaturized microwave components have drawn increased attention due to the size shrinking of the modern communication systems. This talk proposes two approaches to address this problem by reducing the size of the RF components and the antennas.
First, miniaturized substrate integrated waveguide components are introduced and developed by using the metamaterial concept. Traditional waveguide components have excellent performance but with a bulky size due to the above-cutoff frequency operation. We demonstrate that by loading metamaterial elements, the rectangular waveguide can be operated well below the cutoff frequency while maintaining good performance. Based on the substrate integrated waveguide technology, their wave propagation characteristics are studied and their practical applications for guided and radiated RF/microwave components, including transmission lines, filters, couplers, diplexers, oscillators, and leaky-wave antennas, are proposed and implemented. These devices are substantially miniaturized with superior performance achieved.
Second, various miniaturized planar antennas are developed to meet the industry application requirements. Different techniques, such as the metamaterial resonators, meta-surfaces, multi-layer folded structures, and the shared radiator approach, are adopted to design different antennas which are suitable to be applied in many wireless systems, including the WLAN links, cellular phone systems and ultra-wideband communication systems. Some special antennas, such as dually or circularly polarized antennas, diversity antennas, are also designed for specified applications. These antennas exhibit good radiation performance with a smaller size compared with the conventional planar antennas. Some of them are going to be used in commercial WLAN communication systems.
Yuandan Dong received the B.S. and M.S. degrees in the department of radio engineering from Southeast University, Nanjing, China, in 2006 and 2008, respectively. He is currently a Ph.D. candidate in electrical engineering, University of California at Los Angeles (UCLA), under the mentorship of Professor Tatsuo Itoh.
From Sep. 2005 to Aug. 2008, he was a student researcher in the State Key Lab. of Millimeter Waves in Southeast University. Since Sep. 2008, he has been a research assistant with the Microwave Electronics Laboratory in UCLA. He has served as a reviewer for several IEEE and IET journals. He was the recipient of the best student paper award from 2010 APMC Conference held in Yokohama, Japan. He holds several patents and has authored more than 20 refereed journal and conference papers. His research interests include the characterization and development of RF and microwave components, circuits, antennas and metamaterials.