Title :
Decoupled Dual-Antenna System Using Crossed Neutralization Lines for LTE/WWAN Smartphone Applications
Author :
Shang Wang ; Zhengwei Du
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A decoupled dual-antenna system for Long Term Evolution (LTE)/Wireless Wide Area Network (WWAN) smartphone applications is presented. The proposed dual-antenna system is composed of two symmetric antenna elements and two crossed neutralization lines. The antenna element of the proposed dual-antenna system consists of a driven branch and a parasitic ground branch, generating a couple of resonant modes. The dual-antenna system incorporates two crossed neutralization lines to reduce the mutual coupling between the two closely spaced antenna elements. A measured impedance bandwidth with S11 lower than -6 dB over 702-968, 1698-2216, and 2264-3000 MHz is obtained. Within the operating bands, the measured S21 is lower than 10 dB. Based on the measured 3-D radiation patterns, several important figures of merit for the diversity performance of the dual-antenna system are calculated, including the envelop correlation coefficient, the mean effective gain, and the diversity gain, and good results are obtained.
Keywords :
Long Term Evolution; antenna arrays; antenna radiation patterns; smart phones; wide area networks; 3D radiation patterns; LTE smartphone; Long Term Evolution; WWAN smartphone; bandwidth 1698 MHz to 2216 MHz; bandwidth 2264 MHz to 3000 MHz; bandwidth 702 MHz to 968 MHz; crossed neutralization lines; decoupled dual-antenna system; mutual coupling; wireless wide area network; Antenna measurements; Antenna radiation patterns; Gain; Inductors; Mobile antennas; Mutual coupling; Decoupled antennas; mobile phones; multiband antennas; multiple-input–multiple-output (MIMO) systems;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2371020
