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Study of extended interaction oscillator with folded waveguide in sub-terahertz band

Zhang Kai-Chun Wu Zhen-Hua

Study of extended interaction oscillator with folded waveguide in sub-terahertz band

Zhang Kai-Chun, Wu Zhen-Hua
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Publishing process
  • Received Date:  30 May 2012
  • Accepted Date:  24 August 2012
  • Published Online:  05 January 2013

Study of extended interaction oscillator with folded waveguide in sub-terahertz band

  • 1. THz Research Center, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Fund Project:  Project supported by the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2009J045), Doctoral Fund of Ministry of Education of China (Grant No. 20100185110022).

Abstract: In this paper, a folded waveguide is adopted as a slow wave structure (SWS) of the extended interaction oscillator (EIO). An EIO with frequency 105 GHz in sub-Terahertz band is studied in detail, including the dispersion relation and the impedance of the SWS, and the variation of starting current with the period number, which provides an effective way to reduce starting current. On this basis, from the PIC simulation studies are discussed the EIO beam-wave interaction and output characteristics under the operation modes of low current continuous wave and strong current pulse. Further, the tuning characteristic of the EIO is analyzed, showing that output power reaches 26-50 W and the corresponding frequency range is 105.26-105.31 GHz. By EDM technology two fabrication methods of the SWS are investigated and the transmission properties of the SWS and the window are tested indicating that they are in good agreement with the simulation results.

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