Title :
Broadband CPS-fed Yagi-Uda antenna
Author :
Han, Kwangseok ; Park, Yu-Seop ; Choo, Hosung ; Park, Ikmo
Author_Institution :
Dept. of Electr. & Comput. Eng., Ajou Univ., Suwon, South Korea
Abstract :
A broadband coplanar strip line-fed Yagi-Uda antenna is presented. The antenna has a feedline structure that is much simpler than other Yagi-Uda antennas, and provides more design flexibility in arranging the reflector owing to the absence of a large ground plane. To improve the impedance match, a taper is inserted between the wide-line/ small-gap and the narrow-line/large-gap CPS. The proposed antenna has a bandwidth of 3.9-5.9 GHz for a -10 dB reflection coefficient and a gain of 6.5-8.0 dBi. At the centre frequency of 4.9 GHz, the antenna has gain of 7.1 dBi, and a half-power beamwidth (HPBW) of 73deg in the E-plane and 98deg in the H-plane.
Keywords :
Yagi antenna arrays; antenna feeds; broadband antennas; coplanar waveguides; impedance matching; bandwidth 3.9 GHz to 5.9 GHz; frequency 4.9 GHz;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1330
