A COMPACT INTERNAL ANTENNA FOR LTE/WWAN MOBILE PHONE APPLICATIONS

摘要

A compact multiband internal antenna is proposed for LTE/WWAN mobile phone application. The structure of proposed antenna is composed of a coupling feed L-shaped monopole and a grounded meandered branch. The coupling feed L-shaped monopole excites a widely operating band to cover the frequency range of 1750 similar to 2525 MHz for the DCS/PCS/UMTS/LTE/WLAN operation. The grounded meandered branch excites the low frequency operation band to cover the frequency range of 675 similar to 985 MHz for the LTE700/GSM operation. The antenna occupies a small volume of 4 X 14 X 45 mm(3) only. The measured result of the 6 dB return loss meets for each operating band. Moreover, the antenna gain and efficiency are measured in good performances. The measured radiation patterns are similar to general monopole antenna. The characteristics of the proposed antenna make it attractive for slim mobile phone applications. (C) 2016 Wiley Periodicals, Inc.