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International Journal of Antennas and Propagation
Volume 2012, Article ID 193716, 4 pages
http://dx.doi.org/10.1155/2012/193716
Research Article

Very Compact and Broadband Active Antenna for VHF Band Applications

Institut d'Electronique et de Télécommunication de Rennes, Université de Rennes 1, UMR CNRS 6164, 263 avenue, Général Leclerc, 35042 Rennes, France

Received 14 September 2011; Revised 12 December 2011; Accepted 12 December 2011

Academic Editor: Mandeep Jit Singh

Copyright © 2012 Y. Taachouche et al. 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

An active receiving antenna with small size consisting of a monopole loaded with a transistor bipolar is presented in this paper. A transistor is used in order to miniaturize the receiving active antenna size in VHF band. The vertical size of the structure is equal to λ/175, where λ is the wavelength at the lower frequency of the bandwidth. Despite the very small size of the antenna, the frequency bandwidth is very wide and the gain is suitable for FM application with sensitive receivers.