Shielding effectiveness performance and applications of conductive concrete materials and structures
A Seminar By: Dr. Lim Nguyen
Professor, Electrical and Computer Engineering, University of Nebraska-Lincoln
Fulbright Visiting Scholar, American University of Sharjah.
Electromagnetic (EM) shielding is imperative in protecting electrical and electronic assets from natural and man-made EM threats. The wide range of threats such as solar storms, electromagnetic pulse (EMP) including high-altitude EMP (HEMP) and intentional electromagnetic interference (IEMI), high power microwave (HPM), and electronic eavesdropping, requires versatile methods for providing protection and security. Recently, the needs to maintain the resiliency of critical infrastructure facilities including the electric grid, sensitive data centers, and vital communication systems, against EMP events have become a growing concern globally.
The radio frequency (RF) shielding industry has provided EMP protection systems and services based on traditional methods of shielding that employ steel panel enclosures and wire mesh Faraday cages. Their construction and maintenance become impractical or cost prohibitive for large EMP protected facilities such as command-and-control data-operation centers that can exceed 100,000 square feet. In this talk, we review the development of conductive concrete mixtures as EM shielding construction materials that perform as RF absorbers. We report on the experimental study for structural concrete shielding that achieved broadband shielding effectiveness (SE) performance from 10 kHz to 10 GHz. The experimental results demonstrate that the concept of using conductive concrete for building shielded structures is feasible with standard construction practices. We describe the implementation of conductive concrete for EMP shielding facilities and explore designs for SE performance. We discuss a number of applications that employ conductive concrete construction materials and methods for structural shielding.
Date and Time
Location
Hosts
Registration
- Date: 12 Dec 2018
- Time: 03:00 PM to 05:00 PM
- All times are (GMT+04:00) Asia/Dubai
-
Add Event to Calendar
- American University of Sharjah
- Shrajah, United Arab Emirates
- United Arab Emirates
- Room Number: EB1-116
Speakers
Dr. Lim Nguyen of University of Nebraska-Lincoln
Electromagnetic (EM) shielding using conductive concrete
Biography:
Lim Nguyen received the BS degrees in Electrical Engineering and Mathematics from MIT in 1983, the MS degree in Electrical Engineering from Caltech in 1991, and the PhD degree from Rice University in 1996. He was an Electromagnetic Compatibility engineer with Xerox Corporation from 1983 to 1985, an RF and microwave engineer with Hughes Aircraft Company in 1985 and then with the Jet Propulsion Laboratory from 1985 to 1991. From 1991 to 1996, he was an electronics-optical engineer with the US Air Force Phillips Laboratory. Since 1996, he has been with the University of Nebraska-Lincoln where he is presently a professor in the Department of Electrical and Computer Engineering. He was a visiting professor at Yonsei University in 2004–2005 and a Fulbright scholar at Dublin City University in 2011. He is currently on leave as a Fulbright visiting scholar at the American University of Sharjah. His research interest includes self-encoded spread spectrum and fiber optic communications, shielding effectiveness of conductive concrete materials and structures.
Email: