A Broadband Dual-Antenna System Operating at the WLAN/WiMax Bands for Laptop Computers

Author

Yu Liu ; Yan Wang ; Zhengwei Du

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

14

fYear

2015

fDate

2015

Firstpage

1060

Lastpage

1063

Abstract

In this letter, a broadband dual-antenna system working at the WLAN/WiMax bands for laptop computers is proposed. The proposed dual-antenna, printed on a uniplanar printed circuits board, is composed of two symmetric antenna elements and a decoupling structure. The antenna element consists of a feeding pad and an F-shape shorted strip. And the decoupling structure consists of a protruded ground plane and two symmetric branches. The working mechanism of the dual-antenna is analyzed based on the S-parameters and surface currents distributions. The radiation patterns, gains and efficiencies are also measured. A prototype shows that the measured -10 dB impedance bandwidth is 1.30 GHz (2.40-3.70 GHz) for the lower band and 1.41 GHz (4.48-5.89 GHz) for the higher band, with the measured mutual coupling lower than -15 dB at the both bands.

Keywords

WiMax; antenna feeds; antenna radiation patterns; broadband antennas; laptop computers; multifrequency antennas; printed circuits; wireless LAN; F-shape shorted strip; WLAN-WiMax bands; bandwidth 1.3 GHz; bandwidth 1.41 GHz; broadband dual-antenna system; decoupling structure; feeding pad; frequency 2.4 GHz to 3.7 GHz; frequency 4.48 GHz to 5.89 GHz; laptop computers; radiation patterns; surface currents distributions; symmetric antenna elements; symmetric branches; uniplanar printed circuits board; Antenna measurements; Antennas; Bandwidth; Mutual coupling; Portable computers; WiMAX; Wireless LAN; Broadband; coupling fed; dual-antenna; laptop computers; wireless communications;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2394473

Filename

7018061