Title :
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
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;
Conference_Titel :
Intelligent Signal Processing and Communications Systems (ISPACS), 2011 International Symposium on
Conference_Location :
Chiang Mai
Print_ISBN :
978-1-4577-2165-6
DOI :
10.1109/ISPACS.2011.6146209
