Miniaturized Triple-Band Antenna With a Defected Ground Plane for WLAN/WiMAX Applications

Author

Pei, Jing ; Wang, An-Guo ; Gao, Shun ; Leng, Wen

Author_Institution

Sch. of Electron. Inf. Eng., Tianjin Univ., Tianjin, China

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

298

Lastpage

301

Abstract

A miniaturized multifrequency antenna is proposed. The proposed antenna can generate three separate impedance bandwidths to cover all the 2.4/5.2/5.8-GHz WLAN operating bands and the 2.5/3.5/5.5-GHz WiMAX bands. The proposed microstrip-fed antenna mainly consists of a circular ring, a Y-shape-like strip, and a defected ground plane. By adding a Y-shape-like strip in the circular ring, the antenna excites two resonant modes and is with miniaturization structure. Because of the introduction of the cambered ground plane with an isosceles triangle-defect, the third wide band with better impedance matching is obtained. A prototype is experimentally tested, and the measured results show good radiation patterns and enough gains across the operation bands.

Keywords

WiMax; antenna radiation patterns; impedance matching; microstrip antennas; multifrequency antennas; wireless LAN; WLAN/WiMAX applications; Y-shape-like strip; circular ring; defected ground plane; impedance bandwidth; impedance matching; isosceles triangle-defect; microstrip-fed antenna; miniaturization structure; miniaturized multifrequency antenna; miniaturized triple-band antenna; radiation patterns; resonant modes; Antenna measurements; Antenna radiation patterns; Loss measurement; WiMAX; Wireless LAN; Defected ground plane; WLAN/WiMAX applications; microstrip-fed; multi frequency antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2140090

Filename

5744092