A triple-band circularly-polarized antenna with tuning fork shape strips

Author

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

Author_Institution

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

fYear

2012

fDate

4-7 Dec. 2012

Firstpage

711

Lastpage

713

Abstract

A new design of triple-band circular polarized antenna is presented. The proposed antenna is achieved using microstrip-fed with one L shape strip line, two circular strips and two circular patches. One circular strip radiates lower band, the other one covers higher band. By adding the circular patches and L shape microstrip the axial-ratio of this proposed antenna has been improved. This antenna operates in three bands which are 2.5GHz, 3.5GHz and 5.2GHz. These three 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 10dB return loss impedance bandwidths for the band 2.5GHz, band 3.5GHz and 5.2GHz are 33%, 25% and 9.79%, respectively. The 3dB axial-ratio bandwidth are 11.4%, 6.2% and 11.8% with respect to 2.5GHz, 3.5GHz and 5.2GHz, respectively.

Keywords

UHF antennas; WiMax; antenna feeds; microstrip antennas; microwave antennas; polarisation; wireless LAN; L shape strip line; WLAN; WiMax; axial-ratio; circular patches; circular polarization; circular strips; frequency 2.5 GHz; frequency 3.5 GHz; frequency 5.2 GHz; microstrip-fed; return loss impedance bandwidths; triple-band circularly-polarized antenna; tuning fork shape strips; Bandwidth; Loss measurement; Microstrip antennas; Polarization; Shape; Circular polarized Antenna; microstrip; triple band;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2012 Asia-Pacific

Conference_Location

Kaohsiung

Print_ISBN

978-1-4577-1330-9

Electronic_ISBN

978-1-4577-1331-6

Type

conf

DOI

10.1109/APMC.2012.6421712

Filename

6421712