Small-Size Multiresonant Octaband Antenna for LTE/WWAN Smartphone Applications

Author

Yong-Ling Ban ; Cheng-Li Liu ; Zhi Chen ; Li, Joshua Le-Wei ; Kai Kang

Author_Institution

Inst. of Electromagn., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China

Volume

13

fYear

2014

fDate

2014

Firstpage

619

Lastpage

622

Abstract

A compact multiresonant antenna for octaband LTE/WWAN operation in the internal smartphone applications is proposed and discussed in this letter. With a small volume of 15×25×4 mm³, the presented antenna comprises two direct feeding strips and a chip-inductor-loaded two-branch shorted strip. The two direct feeding strips can provide two resonant modes at around 1750 and 2650 MHz, and the two-branch shorted strip can generate a double-resonance mode at about 725 and 812 MHz. Moreover, a three-element bandstop matching circuit is designed to generate an additional resonance for bandwidth enhancement of the lower band. Ultimately, up to five resonances are achieved to cover the desired 704-960- and 1710-2690-MHz bands. Simulated and measured results are presented to demonstrate the validity of the proposed antenna.

Keywords

Long Term Evolution; mobile antennas; multifrequency antennas; smart phones; LTE; WWAN; chip-inductor-loaded two-branch shorted strip; direct feeding strips; frequency 1710 MHz to 2690 MHz; frequency 704 MHz to 960 MHz; octaband antenna; smartphone; three-element bandstop matching circuit; Antenna feeds; Antenna measurements; Antenna radiation patterns; Mobile antennas; Mobile handsets; Bandstop matching circuit; LTE/WWAN operation; mobile phone antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2313353

Filename

6777556