Title :
A Wideband Quad-Antenna System for Mobile Terminals
Author :
Yan Wang ; Zhengwei Du
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A wideband quad-antenna system for mobile terminals is studied. Because a quad-antenna system could consist of two dual-antenna systems, the dual-antenna systems in the open literature are utilized as a fundamental building block. The mutual coupling between them is analyzed, and a decoupling method is adopted. To validate the design, a wideband quad-antenna system, consisting of two symmetry wideband dual-antenna systems and a decoupling element, is fabricated and tested. Its measured -10-dB impedance bandwidth is 1.17 GHz (1.7-2.87 GHz), and measured mutual couplings among the four elements are all below -15 dB at the 1.7-2.74-GHz band. It covers the GSM1800, GSM1900, UMTS, LTE2300, LTE2500, and 2.4-GHz WLAN bands for 2G/3G/4G mobile terminal applications. The radiation patterns are measured. The antenna gains and efficiencies are provided.
Keywords :
3G mobile communication; 4G mobile communication; antenna radiation patterns; broadband antennas; cellular radio; multifrequency antennas; telecommunication terminals; wireless LAN; 2G mobile terminals; 3G mobile terminals; 4G mobile terminals; GSM1800; GSM1900; LTE2300; LTE2500; UMTS; WLAN; antenna efficiency; antenna gain; antenna radiation pattern; bandwidth 1.17 GHz; bandwidth 1.7 GHz to 2.74 GHz; decoupling element; decoupling method; frequency 2.4 GHz; mutual coupling; symmetry wideband dual antenna system; Antenna measurements; Antennas; Capacitance; Mobile communication; Mutual coupling; Scattering parameters; Wideband; Broadband decoupling; dual-antenna system; mobile terminal; quad-antenna system;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2344101
