Compact Wideband Unidirectional Antenna With a Reflector Connected to the Ground Using a Stub

Author

Zhang, Guang-Min ; Hong, Jin-Song ; Wang, Bing-Zhong ; Song, Gangbing ; Zhang, Peng

Author_Institution

Inst. of Appl. Phys., Univ. of Elec tronic Sci. & Technol. of China, Chengdu, China

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

1186

Lastpage

1189

Abstract

A compact wideband unidirectional antenna with a reflector connected to the ground using a stub is proposed in this letter. The proposed antenna consists of a pair of stepped-structure patches and a coplanar waveguide feeding line. One stepped-structure patch is used as a monopole radiator, while the other operates as a reflector. As discussed, when the connection area between the reflector and the ground is small, the antenna can provide unidirectional radiation patterns over the operating frequency band ranging from 3.82 to 5.63 GHz for return loss greater than 10 dB. In this investigation, the optimized size of the proposed antenna is 20 × 20 mm², which is much smaller than most of the current wideband unidirectional antennas. Experimental and simulated results are shown and discussed for practical applications.

Keywords

broadband antennas; coplanar transmission lines; coplanar waveguides; directive antennas; microstrip antennas; microwave antennas; monopole antennas; reflector antennas; compact wideband unidirectional antenna; coplanar waveguide feeding line; frequency 3.82 GHz to 5.63 GHz; monopole radiator; reflector antenna; stepped-structure patches; Antenna measurements; Antenna radiation patterns; Broadband antennas; Connectors; Reflector antennas; Wideband; Icompact; reflector; unidirectional; wideband;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2172970

Filename

6056547