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http://dx.doi.org/10.3807/HKH.2008.19.1.009

A New Type of Yagi-Uda Antenna for High Terahertz Output Power  

Han, Kyung-Ho (School of Electrical and Computer Engineering, Ajou University)
Park, Yong-Bae (School of Electrical and Computer Engineering, Ajou University)
Kim, Sang-In (School of Electrical and Computer Engineering, Ajou University)
Park, Ik-Mo (School of Electrical and Computer Engineering, Ajou University)
Lim, Han-Jo (School of Electrical and Computer Engineering, Ajou University)
Han, Hae-Wook (Department of Electrical and Computer Engineering, Pohang University of Science and Technology)
Publication Information
Korean Journal of Optics and Photonics / v.19, no.1, 2008 , pp. 9-14 More about this Journal
Abstract
In this paper, a new type of Yagi-Uda antenna that operates in the terahertz frequencies is designed. The proposed Yagi-Uda antenna can obtain high input resistance of approximately $2000{\Omega}$ at the resonance frequency by using a full-wavelength dipole instead of a half-wavelength dipole as the driver element. The current leakage into the bias line was minimized by applying the photonic bandgap structure to the bias line. By designing the antenna on a thin substrate, the impedance lowering of an antenna caused by the relative dielectric constant of the substrate was prevented and the end-fire radiation pattern which is the original radiation characteristic of the Yagi-Uda antenna could be obtained. We expect that the proposed Yagi-Uda antenna can achieve increased terahertz output power by improving the impedance mismatching problem with the photomixer.
Keywords
Terahertz antenna; Yagi-Uda antenna; Photomixer; High input impedance;
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