Title :
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
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;
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
DOI :
10.1109/APMC.2012.6421712
