Prof. Richard Ziolkowski: Electrically Small Antennas - Advances in Efficiency, Bandwidth, and Directivity
Prof. Richard Ziolkowski, University of Arizona, will provide a seminar on electrically small antennas. This seminar is part of the University of Calgary Department of Electrical and Software Engineering Research Seminar Series.
After the 1-hour presentation, there will be an opportunity to meet with Dr. Ziolkowski. Light refreshments and pizza will be provided.
The introduction of metamaterials and metamaterial-inspired structures into the tool set of RF engineers has led to a wide variety of advances within research and application areas treating structures that radiate (e.g., RF antennas) and scatter (e.g., optical nano-antennas). The increased awareness of complex media, both naturally occurring and artificially constructed, which has been stimulated by the debut of metamaterials, has enabled paradigm shifts in terms of our understanding of how devices and systems operate and our expectations of their performance characteristics. These shifts include the trends of miniaturization, enhanced performance (total radiated power, bandwidth and directivity), reconfigurability and multifunctionality. New techniques have been developed that are truly beginning to impact practical realizations and their applications.
A variety of metamaterial-inspired, near-field resonant parasitic (NFRP), electrically small antennas have been developed that exhibit multifunctional performance, enhanced bandwidths, and higher directivities. Their engineering is achieved by combining multiple NFRP elements with simple driven radiators. Higher directivity is obtained by simultaneously exciting balanced electric and magnetic NFRP elements, leading, for example, to endfire and broadside radiating Huygens dipole antennas (HDAs). Enhanced bandwidths and loss mitigation, as well as wireless power transfer capabilities, have been achieved by augmenting the HDAs with non-Foster (active) and rectifying (rectenna) elements. A variety of HDAs and arrays of them have been fabricated and tested to confirm their attractive performance characteristics; they will be reviewed briefly.
Nonetheless, even more highly directive antenna systems are being sought to address the perceived needs of the NextG / XG wireless systems and their applications. Combinations of higher order multipole electric and magnetic radiating elements have been developed that achieve unidirectional performance with even higher directivities. Several of these unidirectional mixed-multipole antennas (UMMAs) have been fabricated and tested to confirm their attractive properties. They too will be reviewed briefly.
Date and Time
Location
Hosts
Registration
- Date: 02 Oct 2024
- Time: 11:30 AM to 01:00 PM
- All times are (UTC-06:00) Mountain Time (US & Canada)
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- 856 Campus Pl NW
- Calgary, Alberta
- Canada
- Building: ICT
- Room Number: 516
- Starts 11 September 2024 12:00 AM
- Ends 01 October 2024 11:59 PM
- All times are (UTC-06:00) Mountain Time (US & Canada)
- No Admission Charge
Speakers
Prof. Richard Ziolkowski, University of Arizona
Biography:
Richard W. Ziolkowski (M’87–SM’91–F’94−LF’20) received (magna cum laude) the B. Sc. degree (Hons.) in physics from Brown University, Providence, RI, USA, in 1974; the M.S. and Ph.D. degrees in physics from the University of Illinois at Urbana-Champaign, Urbana, IL, USA, in 1975 and 1980, respectively; and an Honorary Doctorate degree from the Technical University of Denmark, Kongens Lyngby, Denmark in 2012.
He is currently a Professor Emeritus with the Department of Electrical and Computer Engineering at the University of Arizona, Tucson, AZ, USA. He was a Litton Industries John M. Leonis Distinguished Professor in the College of Engineering as well as a Professor in the College of Optical Sciences until his retirement in 2018. He was also a Distinguished Professor in the Global Big Data Technologies Centre in the Faculty of Engineering and Information Technologies (FEIT) at the University of Technology Sydney, Ultimo NSW Australia from 2016 until 2023. He was the Computational Electronics and Electromagnetics Thrust Area Leader with the Engineering Research Division of the Lawrence Livermore National Laboratory before joining The University of Arizona in 1990.
Prof. Ziolkowski was the recipient of the 2019 IEEE Electromagnetics Award (IEEE Technical Field Award). He became a Fellow of OPTICA (previously the Optical Society of America, OSA) in 2006, and a Fellow of the American Physical Society (APS) in 2016. He was the 2014−2015 Fulbright Distinguished Chair in Advanced Science and Technology (sponsored by DSTO, the Australian Defence Science and Technology Organisation). He served as the President of the IEEE Antennas and Propagation Society (AP-S) in 2005 and has had many other AP-S leadership roles. He is also actively involved with the International Union of Radio Science (URSI) and the European Association on Antennas and Propagation (EurAAP) professional societies.
