Browsing by Author "Lin, Yi-Mao"

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A Dual-Band Circularly-Polarized Antenna with Double C Shape Strips
(2011)
Lin, Yi-Mao
;
Huang, Jie-Huang
;
Jou, Christina F.
;
電信工程研究所
;
Institute of Communications Engineering
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.
A Triple-Band Circularly-Polarized Antenna with Tuning Fork Shape Strips
(2012-01-01)
Dai, Yu-Hsiu
;
Lin, Yi-Mao
;
Huang, Jie-Huang
;
Jou, Christina F.
;
電信工程研究所
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.
A Triple-Band Circularly-Polarized Antenna with Tuning Fork Shape Strips
(2012-01-01)
Dai, Yu-Hsiu
;
Lin, Yi-Mao
;
Huang, Jie-Huang
;
Jou, Christina F.
;
電信工程研究所
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.