An LTE/WWAN antenna contains monopole and coupled-fed loop for internal mobile phone

This article presents an LTE/WWAN antenna for mobile phone application. The low operation band from 690-1100 MHz is excited by two coupled-fed loops for applying at LTE700/GSM850/900 band. The high operation band from 1700-2690 MHz for GSM1800/1900/UMTS/LTE2300/2500 band is achieved by two monopoles and an inverted-C-shaped strip attached with the coupled-fed loop. A 33 nH chip inductor is inserted in a monopole for decreasing resonant length.