A dual-band circularly-polarized antenna with double C shape strips

Author

Lin, Yi-Mao ; Huang, Jie-Huang ; Jou, Christina F.

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2011

Firstpage

1862

Lastpage

1865

Abstract

A new design of dual-band circular polarized antenna is presented. The proposed antenna is achieved using microstrip-fed with two circular strips and two circular patch. One circular strip radiates lower band, the other one covers higher band. By adding the circular patch on the back of the substrate, the left-hand circular polarization (LHCP) gain at the positive z axial of this proposed antenna has been improved. The antenna operates in two bands which are 2.5GHz and 5.2GHz. These two operating bands can be applied for the WiMax and WLAN application. Experimental results show the proposed antenna has good return loss and circular polarization characteristics. The 10 dB return loss impedance bandwidths for the lower band (2.5GHz) and higher band (5.2GHz) are 50% and 23%, respectively. The 3dB axial-ratio bandwidth are 14.8%and 4.0% with respect to 2.5GHz and 5.2GHz, respectively.

Keywords

UHF antennas; WiMax; antenna feeds; microstrip antennas; microwave antennas; polarisation; wireless LAN; WLAN; WiMax; bandwidth 2.5 GHz; bandwidth 5.2 GHz; circular patch; circular strip; double C shape strip; dual-band circularly-polarized antenna; left-hand circular polarization; loss 10 dB; microstrip-fed; Antenna measurements; Bandwidth; Dual band; Microstrip antennas; Substrates; Circular polarized Antenna; dual band; microstrip;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4577-2034-5

Type

conf

Filename

6174137