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International Journal of Antennas and Propagation
Volume 2015 (2015), Article ID 715958, 8 pages
http://dx.doi.org/10.1155/2015/715958
Research Article

A CPW-Fed Quasi-PIFA Antenna Using Quasi-Lumped Resonators for Mobile Phones

School of Electrical and Electronics Engineering, Universiti Sains Malaysia, Engineering Campus Seberang Perai Selatan, 14300 Nibong Tebal, Penang, Malaysia

Received 27 July 2014; Revised 2 November 2014; Accepted 3 November 2014

Academic Editor: Sai-Wai Wong

Copyright © 2015 Majid Rafiee 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

A novel single CPW-fed Quasi-Planar Inverted-F Antenna (PIFA) using quasi-lumped elements is developed for mobile communication handheld terminals operating at 2.6 GHz. The antenna is composed of an inductor covered by a set of interdigital and parasitic capacitors. The proposed antenna achieves a measured bandwidth of 11% for return loss with the antenna gain of about 4 dBi. The antenna is designed in single layer (zero height) which is appropriate to be used in thin devices where a small room is considered for the antenna. The proposed antenna is suitable for use in Long Term Evolution band 7. The operating frequency of introduced antenna depends on the number of interdigital fingers and inductor length rather than the total resonator patch only, so that the operating frequency can be altered while the total patch size remains unchanged. The calculated operating frequency is confirmed by simulation and measurement. Also the dipole-like simulated radiation pattern is confirmed by measurement.