**Author details**

Mohamed I. Ahmed1 \* and Mai F. Ahmed2

1 Microstrip Department, Electronics Research Institute, Giza, Egypt

2 Department of Electrical and Electronics Engineering, Faculty of Engineering, Zagazig University, Zagazig, Egypt

\*Address all correspondence to: miahmed@eri.sci.eg

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
