Electrical Engineering and Computer Science

ECE Seminar or Event

Low-Cost Ultrawideband (UWB) Phased Array Antennas Importance, Challenges, and Inroads

Dr. Marinos N. Vouvakis

University of Massachusetts, Amherst
 
Friday, October 11, 2013
09:30am - 10:30am
1005 EECS

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About the Event

The two prevailing trends in modern communication and sensing systems are increased information throughput or functionality, and size miniaturization. From the prospect of physical-layer electronics such as RF and antenna engineering,  these trends  translate into hardware with wider bandwidths and higher operating frequencies. Yet, when it comes to the design of antenna arrays, that are necessary in wireless communications, stand-off sensing  or electronic countermeasure systems, these treads are in direct conflict with one another. Ultrawideband (UWB) phased arrays are significantly more challenging to design and build than their narrowband counterparts, where manufacturability constraints above  X-band severely limit the effectiveness of many bandwidth enhancement methods. Established UWB phased array technologies are either too complicated to build at EHF, or use performance-limiting feeding methods, or are cumbersome to install and maintain due to lack of aperture modularity.  This seminar will focus on a novel low-cost UWB phased  array, the planar ultrawideband modular antenna (PUMA) that  overcomes all these limitations. The PUMA array is extremely simple, making it easy to build with standard low-cost microwave fabrication PCB technologies even above Ku-band. Moreover, the carefully laid-out PUMA  aperture allows for modular manufacturing with tiled assemble, leading to certain cost, installation, maintenance and robustness benefits. After a brief introduction in ultrawideband/multifunctional systems and phased arrays, the talk will focus on the basic PUMA array topology,variations, principles of operation and modeling,  design and manufacturing approaches. The design, fabrication and  measurements of an exemplary 7-21GHz PUMA array will be used to  concretely demonstrate the technology. Several newer computational  prototypes will be presented that operate at higher than 6:1  bandwidths.

Biography

Dr. Marinos N. Vouvakis (Sྟ, Mཁ) is an Associate Professor of Electrical and Computer Engineering (ECE) at the University of Massachusetts Amherst, where he conducts research and teaching in the areas of microwave and antenna engineering, and Computational  electromagnetics. Dr. Vouvakis received the Diploma degree in ECE  from the Democritus University of Thrace (DUTH), Xanthi, Hellas in 1999, he holds a M.S. from Arizona State University (ASU), Tempe, AZ  and a Ph.D. from The Ohio State University (OSU), Columbus OH, both in ECE. Since 2005 he is with the Umass ECE faculty as a member of  the Center for Advanced Sensor and Communication Antennas (CASCA)  and the Antennas and Propagation Laboratory (APLab).  His main  research interests are in computational electromagnetics (CEM),  where he has contributed in the areas of domain decomposition  methods, finite element methods, fast integral equation methods,  hybrid methods, and model order reduction. His recent research also include experimental work on ultrawideband antennas and low-profile ultrawideband phased arrays.

Additional Information

Contact: Karla Johnson

Phone: 764-0500

Email: karladj@umich.edu

Sponsor: MICDE

Open to: Public