Table of Contents
International Journal of Microwave Science and Technology
Volume 2012 (2012), Article ID 873126, 9 pages
http://dx.doi.org/10.1155/2012/873126
Research Article

A Novel Internal Dual-Polarized EBG Antenna for Indoor Reception of UHF Terrestrial Digital TV Broadcasting

1Amant Antennas, Giza 12451, Egypt
2Department of Biomedical Engineering and Systems, Cairo University, Giza 12613, Egypt

Received 1 March 2012; Revised 24 June 2012; Accepted 8 July 2012

Academic Editor: Safieddin Safavi-Naeini

Copyright © 2012 Mohamed Sanad and Noha Hassan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel internal antenna has been developed for indoor reception of UHF terrestrial digital TV broadcasting. The overall size of some configurations of the new antenna is less than 2 cm3, and its weight is less than 1 gm. It is made of a flexible material that can be bent or folded and shaped in any form. It is an unbalanced resonant antenna that does not need a matching circuit. The new antenna can be fully embedded inside TV sets or portable computers. It has a bandwidth of about 68%. Thus, it can also cover the bands of GSM and CDMA, which is advantageous in case of portable computers. The new antenna is linearly polarized. It can be easily modified to be dual polarized by combining two orthogonal antennas with one or two feed points. The overall efficiency of some configurations of the new indoor digital TV receiving antenna is more than 80%, and its peak gain is about 2 dBi over the whole UHF band. The peak gain can be increased to more than 5 dBi by adding EBG (electromagnetic bandgap) structures. The EBG structure also increases the efficiency to around 90%.