High efficiency conical shape THz coupler
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Capital Normal University,Capital Normal University,Capital Normal University,Capital Normal University

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    Abstract:

    A coupler for coupling terahertz radiation into a waveguide was designed, which is the combination of a conical column and a short cylinder made of aluminum. The performance of the coupler in the cases of a broadband collimated terahertz wave and a single frequency collimated terahertz wave from free-space into an anti-resonate waveguide was simulated by theory and verified by experiment. The results confirm that the coupler is a high efficiency and broad band THz coupler. By optimizing the dimension parameters of the coupler, the amplitude coupling ratio of 71% and the amplitude concentration factor of 6.125 in the terahertz time domain spectroscopy system have been achieved.

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CHEN Tian-Ji, HE Ting, ZHANG Bo, SHEN Jing-Ling. High efficiency conical shape THz coupler[J]. Journal of Infrared and Millimeter Waves,2016,35(2):194~199

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History
  • Received:February 01,2015
  • Revised:December 24,2015
  • Adopted:March 23,2015
  • Online: May 11,2016
  • Published: