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

고출력 테라헤르츠파 발생을 위한 새로운 구조의 Yagi-Uda 안테나

  • 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)
  • 한경호 (아주대학교 전자공학부) ;
  • 박용배 (아주대학교 전자공학부) ;
  • 김상인 (아주대학교 전자공학부) ;
  • 박익모 (아주대학교 전자공학부) ;
  • 임한조 (아주대학교 전자공학부) ;
  • 한해욱 (포항공과대학교 전자컴퓨터공학과)
  • Published : 2008.02.29

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.

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