Tunable Materials with Applications in Antennas and Microwaves

Tunable Materials with Applications in Antennas and Microwaves is a stimulating topic in these modern times. With the explosion of the new generation of the wireless world, greater emphasis than ever before is being placed on the analysis and applications of modern materials. This book describes the characteristics of Ferrites and Ferroelectrics and introduces the reader to Multiferroics.

1. Represents, in a simple manner, the solid state physics and explains the permittivity and permeability tensor characteristics for the tunable materials of infinite and finite dimensions.
2. Gives the applications of tunable materials in resonators, filters, microstrips, striplines, antennas, phase shifters, capacitors, varactors, and frequency selective surfaces.
3. Describes in detail the mathematical analysis for spin and magnetostatic waves for infinite medium, thin slab films, and finite circular discs. The analysis contains original work, which the reader may extend in the future.
4. Provides multiferroics, which are ferrite and ferroelectric composites. Multiferroics are very promising tunable materials which are believed will offer many applications in the near future.
5. Contains the planar transmission lines with analytic formulas for multilayer microstrips, transmission lines, and waveguides with isotropic as well as anisotropic dielectric and magnetic materials. Also, gives the formulas to analyze the layered category of transmission lines with multiferroics.

This book is intended for antenna and microwave engineers as well as for graduate students of Materials Science and Engineering, Electrical & Computer Engineering, and Physics Departments.

John N. Sahalos received B.Sc. degree in Physics, M.Sc. degree in Electronic Physics, BCE & MCE degrees in Civil Engineering, and Ph.D. in Electronic Physics from the Aristotle University of Thessaloniki, (AUTH) Greece. Prof. Sahalos is with the Radio-Communications Laboratory at the AUTH, and with the Department of Engineering at the University of Nicosia, Cyprus. For eight years he was a Professor in the ECE Department, University of Thrace, Greece, and Director at the Microwaves Laboratory. He was a visiting faculty member at Ohio State University, the University of Colorado, and the Technical University of Madrid. He was also on the board of directors of the National Research & Technology Committee of Greece and on the Board of Directors of OTE S.A., the largest telecommunications company in Southeast Europe. For more than 10 years, Prof. Sahalos was the president of the Greek committees of URSI. Also,he was a member of the committee and internal auditor of EurAAP (European Association of Antennas & Propagation). Besides his academic duties, he is now a Coordinator of the R&D advisory board at a high tech industry. Prof. Sahalos is an IEEE Life Fellow, an Honorary Fellow of the Electronic Physics Society, a Fellow of the Physical Society, and a member of the Technical Chamber of Greece. He is the author of four books, one in English (Wiley), and of more than 450 articles published in scientific literature. His research interests include antennas, radio communications, EMC/EMI, RFIDs, Microwaves, and Biomedical Engineering. With his colleagues, he designed innovative products like the EIT, the MLS, the ORAMA simulator and the SMS-Kmonitoring system.George A. Kyriacou was born in Famagusta, Cyprus, on March 25, 1959. He received his Electrical Engineering diploma and Ph.D. degree, both with honors, from the Democritus University of Thrace, Xanthi, Greece, in 1984 and 1988, respectively. Since January 1990, he has been continuously with the Department of Electrical and Computer Engineering, Democritus University of Thrace, where he is currently Professor and Director of the Microwaves Laboratory. From 2005 to 2010 he has been Director of the Graduate Studies of the department. He has authored over 250 journal andconference papers and supervised 7 Ph.D. and 11 M.Sc. theses and more than 90 Diploma theses. His main research interests include microwave engineering, open waveguides and antennas in anisotropic media, software-defined and cognitive radio, computational electromagnetics, and biomedical engineering. Dr. Kyriacou is member of IEEE since 1990 and senior member since 2000. He is also a member of the Technical Chamber of Greece and the European Microwave Association (EuMA).