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International Journal of Antennas and Propagation
Volume 2016 (2016), Article ID 4791831, 7 pages
Research Article

A Small Planar Antenna for 4G Mobile Phone Application

Centre for THz Research, China Jiliang University, Hangzhou 310018, China

Received 5 November 2015; Revised 26 February 2016; Accepted 2 March 2016

Academic Editor: Renato Cicchetti

Copyright © 2016 Hu Jian-rong 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.


The analysis and design of a small planar multiband antenna operating in the 4G frequency bands are presented. The numerical and experimental results demonstrated that the proposed antenna satisfies the requirement of 6 dB return loss for the impedance bandwidth of the LTE700/LTE2300/LTE2500 and WiMAX3500 bands. The gains at 750 MHz/2.3 GHz/2.6 GHz/3.5 GHz are 2.1 dBi/4.9 dBi/4.7 dBi/4.3 dBi, respectively. The measured radiation patterns verify the suitability of the antenna to be employed in mobile phones. The dimensions of the radiant patch are 49 × 10 mm2. The proposed antenna can be easily fabricated and customized to various 4G mobile phones as a compact internal antenna.