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International Journal of Antennas and Propagation
Volume 2014, Article ID 182927, 7 pages
Research Article

Low-Profile Folded-Coupling Planar Inverted-F Antenna for 2.4/5 GHz WLAN Communications

1Department of Physics, National Kaohsiung Normal University, Kaohsiung 802, Taiwan
2Department of Mathematic and Physical Sciences, R.O.C. Air Force Academy, Kaohsiung 820, Taiwan
3Department of Electronic Engineering, National Kaohsiung Normal University, Kaohsiung 802, Taiwan

Received 4 May 2014; Accepted 15 June 2014; Published 26 June 2014

Academic Editor: Yingsong Li

Copyright © 2014 Hung-Yu Li 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.


A dual-band folded-coupling planar inverted-F antenna (FC-PIFA) is presented in this paper. By using the folded-coupling technique, the proposed antenna provides two distinct impedance bandwidths of 159 MHz (about 6.5% centered at 2.45 GHz) and 1512 MHz (about 27.5% centered at 5.5 GHz), which cover the required bandwidths for the 2.4/5 GHz wireless local area network (WLAN) communications. Moreover, the antenna shows a low profile of 5 mm and a small length of 20.5 mm in radiating area, making it easy to be installed in the casing of wireless handheld devices and laptops. Details of the design procedures and experimental results are discussed.