A Broadband Unidirectional Multi-Dipole Antenna With Very Stable Beamwidth

Author

Qing-Xin Chu ; Yu Luo

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

61

Issue

5

fYear

2013

fDate

5/1/2013 12:00:00 AM

Firstpage

2847

Lastpage

2852

Abstract

A broadband multi-dipole antenna with stable beamwidth is presented. Through a rational design of position of dipoles and a reflector, an antenna with a wide impedance bandwidth, stable radiation pattern and nearly identical E- and H-planes is achieved. A laboratory model has been characterized experimentally. Experimental results agree well with simulations. Results show that an impedance bandwidth of 59.7% for SWR <; 1.5 from 1.55 to 2.87 GHz was achieved. Stable radiation pattern with 3 dB beamwidth 63.3 ± 2.9 degree at H-plane and 63.4 ± 2 degree at E-plane and an antenna gain of 9 ± 0.6 dBi was found over the operating frequencies.

Keywords

antenna radiation patterns; broadband antennas; dipole antennas; reflector antennas; E-planes; H-planes; antenna gain; broadband unidirectional multi dipole antenna; impedance bandwidth; reflector; stable radiation pattern; very stable beamwidth; Antenna radiation patterns; Broadband antennas; Broadband communication; Dipole antennas; Gain; Impedance; Reflector antennas; Multi-dipole; stable radiation patterns; unidirectional antenna; wideband antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2243898

Filename

6423797