SCALE MODELING OF GAIN AND RCS: SIMULATIONS, MEASUREMENTS AND COMPARISONS
Prof. Constantine A. Balanis, Arizona State University
June 15, 2015, 10:30 am, NIA, Rm 101
Host: C.J. Reddy, Altair
Abstract
Two very important figures-of-merit for antennas and scattering are gain and RCS, respectively. For many applications the structure for both antennas and scattering is so immense electrically that actual simulations on full-scale models is very challenging, even with today’s advances in computational resources and software. Examples may include antennas mounted on ships, aircraft, spacecraft, ground-based vehicles, etc. and the frequency is so high that makes the structure electrically large; similarly for scattering. To overcome such challenges and provide an alternative, it is often convenient to perform the same simulations, measurements and comparisons on scaled models and refer the data to full-scale models. For such an approach, the simulations can be performed efficiently using current full-wave electromagnetic simulators and the measurements can be performed in indoor experimental facilities which permit control of the environment and minimize costs associated with large structures. In addition, parametric studies can be performed efficiently and effectively on the scaled models with minimal costs and time.
In this presentation we will review the analytical formulations related to scale modeling, and present simulations, measurements and comparisons of antenna gain of basic radiators mounted on scaled models and then referred to the corresponding full-scale structures. In addition, RCS full-wave simulations, measurements and comparisons of basic radar targets, such as PEC plates of different configurations for both vertical and horizontal polarizations, will be presented and compared. The peak values of monostatic RCS will also be contrasted with those obtained using Physical Optics (PO).
Bio
Constantine A. Balanis (S’62 – M’68 – SM’74 – F’86 – LF’2004) received the BSEE degree from Virginia Tech, Blacksburg, VA, in 1964, the MEE degree from the University of Virginia, Charlottesville, VA, in 1966, the Ph.D. degree in Electrical Engineering from Ohio State University, Columbus, OH, in l969, and an Honorary Doctorate from the Aristotle University of Thessaloniki (AUTH) in 2004.
From 1964-1970 he was with NASA Langley Research Center, Hampton VA, and from 1970-1983 he was with the Department of Electrical Engineering, West Virginia University, Morgantown, WV. Since 1983 he has been with the Department of Electrical Engineering, Arizona State University, Tempe, AZ, where he is now Regents’ Professor. His research interests are in low- and high-frequency methods for antennas propagation, and scattering; smart antennas for wireless communication; penetration and scattering of High Intensity Radiated Fields (HIRF); and multipath propagation. He received the 2000 IEEE Third Millennium Medal, the 1997 Outstanding Graduate Mentor Award of Arizona State University, the 1992 Special Professionalism Award from the IEEE Phoenix Section, the 1989 IEEE Region 6 Individual Achievement Award, and the 1987-1988 Graduate Teaching Excellence Award, School of Engineering, Arizona State University.
Dr. Balanis is a Life Fellow of the IEEE, and a member Sigma Xi, Electromagnetics Academy, Tau Beta Pi, Eta Kappa Nu, and Phi Kappa Phi. He has served as Associate Editor of the IEEE Transactions on Antennas and Propagation (1974-1977) and the IEEE Transactions on Geoscience and Remote Sensing (1981- 1984), as Editor of the Newsletter for the IEEE Geoscience and Remote Sensing Society (1982-1983), as Second Vice-President (1984) and member of the Administrative Committee (1984-85) of the IEEE Geoscience and Remote Sensing Society, and as Chairman of the Distinguished Lecturer Program of the IEEE Antennas and Propagation Society (1988-1991), Distinguished Lecturer of IEEE Antennas and Propagation Society (2003-), and member of the AdCom (1992-95, 1996-1999) of the IEEE Antennas and Propagation Society. In addition, he served for the IEEE Upper Monongahela Subsection of the IEEE Pittsburgh Section as: Chairman (1978-79), Vice-Chairman (1977-78), Secretary-Treasurer (1975-76), and Delegate-at-large (1974-75). He is the author of Antenna Theory: Analysis and Design (Wiley; 1982, 1997, 2005) and Advanced Engineering Electromagnetics (Wiley, 1989).