Title :
Decoupled Closely Spaced Heptaband 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. & Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Abstract :
A planar antenna array, which is closely placed with an infinitesimal distance of only 4 mm between array elements yet well decoupled by a deliberately designed small-size protruded ground, is presented. The well-designed protruded ground has two types of behaviors: reducing the coupling in between the array elements and improving impedance matching to enhance the bandwidth. At the lower bands of GSM850/900 and the upper bands of GSM1800/1900/UMTS/LTE2300/2500, the good radiation efficiencies of better than 43% and 50% respectively are obtained, and simultaneously the isolations of better than 10 dB are achieved in between the antenna elements. A prototype is made and tested, with S-parameters, radiation efficiency, radiation pattern, and envelope correlation coefficient (ECC) presented.
Keywords :
3G mobile communication; Long Term Evolution; S-parameters; antenna radiation patterns; cellular radio; impedance matching; multifrequency antennas; planar antenna arrays; smart phones; wide area networks; ECC; GSM1800-1900; GSM850-900; S-parameters; UMTS-LTE2300-2500; WWAN-LTE smartphone; antenna elements; array elements; decoupled closely spaced antenna array; envelope correlation coefficient; heptaband antenna array; impedance matching; infinitesimal distance; planar antenna array; protruded ground; radiation efficiency; radiation pattern; Antenna arrays; Antenna measurements; Antenna radiation patterns; Arrays; Couplings; MIMO; Closed-spaced antennas; decoupled antennas; heptaband WWAN/LTE; planar antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2295623
