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V. Raptis, C. Votis, G. Tatsis, S. K. Chronopoulos, V. Christofilakis and P. Kostarakis, “Tuning Techniques for Planar Antennas in Wireless Communication,” Proceedings of the 7th International Conference of the Balkan Physical Union, Alexandroupolis, 9-13 September 2009, pp. 1053-1057.

has been cited by the following article:

• TITLE: Development and Experimental Measurements of a Tunable Antenna

  AUTHORS: Vasilis Raptis, Giorgos Tatsis, Spyridon K. Chronopoulos, Stavros Mallios, Panos Kostarakis

  KEYWORDS: PIFA; Mobile Antenna; Varactor; Frequency Tuning

  JOURNAL NAME: Communications and Network, Vol.5 No.3, August 2, 2013

  ABSTRACT: Modern telecommunication systems need to be equipped with antennas that are precisely tuned to more than one frequency in order to allow operation in several bands. Antenna precise tuning to the desired frequency is very important for system performance. In this paper the operating frequency of a PIFA antenna is adjusted using a varactor. This configuration has the advantage of continuous tuning, thus correcting any frequency deviation due to environmental or other changes. The PIFA antenna’s tuning ranges from 860 MHz to 1025 MHz. Also, the geometry of the antenna is studied through simulations and the effect of the varactor is tested experimentally.