Title :
Decoupled Hepta-Band Antenna Array for WWAN/LTE Smartphone Applications
Author :
Yong-Ling Ban ; Zhong-Xiang Chen ; Zhi Chen ; Kai Kang ; Li, Joshua Le-Wei
Author_Institution :
Inst. of Electromagn., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A wideband antenna array incorporating a neutralization line (NL) for port decoupling for smartphone applications is proposed. The U-shape NL is employed to achieve enhanced isolations for the lower band, which are better than 10 dB for 824-960 MHz. The mechanism of the NL is explained based on the S-parameters and the surface current distributions. In addition, the incorporated NL has acceptable effects on the bandwidth, while a bandstop filter and on-ground slots are utilized to realize the hepta-band coverage, covering the GSM850/900/1800/1900/UMTS/LTE2300/2500 operation. A prototype is fabricated and tested, with S-parameters, radiation efficiencies, radiation patterns, envelope correlation coefficient (ECC), and mean effective gain (MEG) presented.
Keywords :
Long Term Evolution; S-parameters; antenna arrays; band-stop filters; broadband antennas; mobile antennas; smart phones; wide area networks; GSM1800; GSM1900; GSM850; GSM900; LTE smartphone; LTE2300; LTE2500; S-parameters; U-shape neutralization line; UMTS; WWAN; bandstop filter; envelope correlation coefficient; frequency 824 MHz to 960 MHz; hepta-band antenna array; mean effective gain; on-ground slots; radiation efficiencies; radiation patterns; surface current distributions; wideband antenna array; Antenna arrays; Antenna measurements; Antenna radiation patterns; Arrays; MIMO; Mutual coupling; Decoupled antennas; heptaband WWAN/LTE antenna; neutralization line; smartphone applications;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2325877
