A dual-band unidirectional antenna using a hemispherical monopole with circular reflector

Author

Nuangwongsa, Kanawat ; Phongcharoenpanich, Chuwong ; Kosulvit, Sompol

Author_Institution

Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2011

fDate

7-9 Dec. 2011

Firstpage

1

Lastpage

4

Abstract

This paper presents a unidirectional antenna using a hemispherical monopole with circular reflector for dual-band wireless communication applications. It consists of a hemispherical monopole with a sheet of stub. The stub is placed over a hemispherical monopole for low frequency band operation. The radiation patterns are controlled by circular reflector together with circular ring and rectangular ring. At 2.4 GHz, the antenna radiates by a sheet of stub and a hemispherical monopole with rectangular ring. At 5.8 GHz, it radiates by a hemispherical monopole with circular ring. The proposed antenna is designed to operate between 2.4-2.5 GHz and 5.15-5.85 GHz with |S₁₁| <; -10 dB. The antenna has high gain and the radiation pattern at both bands are unidirectional beam. The simulated and measured results are presented.

Keywords

UHF antennas; antenna radiation patterns; microwave antennas; monopole antennas; multifrequency antennas; reflector antennas; circular reflector; circular ring; dual-band unidirectional antenna; dual-band wireless communication; frequency 2.4 GHz to 2.5 GHz; frequency 5.15 GHz to 5.85 GHz; hemispherical monopole; radiation patterns; rectangular ring; Artificial intelligence; circular reflector; circular ring; hemispherical monopole; stub and rectangular ring;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communications Systems (ISPACS), 2011 International Symposium on

Conference_Location

Chiang Mai

Print_ISBN

978-1-4577-2165-6

Type

conf

DOI

10.1109/ISPACS.2011.6146209

Filename

6146209