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International Journal of Antennas and Propagation
Volume 2015, Article ID 970152, 6 pages
Research Article

A Novel Multiband Miniature Planar Inverted F Antenna Design for Bluetooth and WLAN Applications

1Department of Electronics, Wayamba University of Sri Lanka, Kuliyapitiya, Sri Lanka
2Department of Electrical and Electronic Engineering, University of Peradeniya, Peradeniya, Sri Lanka

Received 23 November 2014; Revised 28 January 2015; Accepted 28 January 2015

Academic Editor: Stefano Selleri

Copyright © 2015 J. M. Jeevani W. Jayasinghe and Disala Uduwawala. 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.


A novel compact planar inverted F antenna (PIFA) optimized using genetic algorithms for 2.4 GHz (Bluetooth) and 5 GHz (UNII-1, UNII-2, UNII-2 extended, and UNII-3) bands is presented. The patch with a shorting pin is on a  mm3 substrate, which is suspended in air 5 mm above a  mm2 ground plane. Genetic algorithm optimization (GAO) is used to optimize the patch geometry, feed position, and shorting pin position simultaneously. Simulations are carried out by using HFSS and a prototype antenna is fabricated to compare the measurements with the simulations. The antenna shows fractional impedance bandwidths of 4% and 21% and gains of 2.5 dB and 3.2 dB at lower and upper bands, respectively.