Title :
A modified quasi-Yagi planar antenna with wideband characteristics in C-band
Author :
Cheunsoo Ha ; Yongxi Qian ; Itoh, T.
Author_Institution :
Sch. of Electron. Eng., Kumoh Nat. Univ. of Tech, KyoungBuk, South Korea
Abstract :
The planar microstrip-fed quasi-Yagi antenna has shown excellent radiation characteristics over a wide frequency band. In this paper, we report a modified version of the quasi-Yagi antenna to further improve its performance. The C-band prototype antenna measures 50% bandwidth (S/sub 11/ < -10 dB) and higher gain (6.5 dB) than the original quasi-Yagi design. The antenna radiates a well-defined endfire beam, with a front-to-back ratio > 20 dB and cross polarization level below -18 dB. The enhanced performances have been confirmed by both FDTD simulations and measurements.
Keywords :
Yagi antenna arrays; antenna radiation patterns; finite difference time-domain analysis; microstrip antenna arrays; planar antenna arrays; 6.5 dB; C-band; FDTD simulations; antenna radiation characteristics; endfire beam; microstrip-fed antenna; modified quasi-Yagi antenna; performance; planar antenna; Antenna measurements; Bandwidth; Broadband antennas; Frequency; Gain measurement; Microstrip antennas; Performance evaluation; Planar arrays; Polarization; Prototypes;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.960056
