A High-Efficiency 220 GHz Doubler Based on the Planar Schottky Varactor Diode

  • Bo ZhangEmail author
  • Dongfeng Ji
  • Yingcun Min
  • Yong Fan
  • Xiaodong Chen
Open Access


In this paper, we present the design, analysis and measurement of a 220 GHz doubler, based on a planar Schottky varactor diode. The 3D model of the varactor diodes were firstly established in a high-frequency structure simulator, then the parasitic parameters were extracted and imported into advanced design system, in order to optimize the whole circuit. The experiment on the doubler was carried out, and the measured results showed the maximum output power of 21.39 mW with a corresponding efficiency of 24% at 218 GHz, which agreed well with simulation results. The conversion efficiency exceeded 10% in the frequency range of 197–230 GHz.


Terahertz wave doubler Schottky varactor diode high conversion efficiency 



This work was supported in part by the National Natural Science Foundation of China (NSFC) under Grant Nos. 61771116 and 91738102.


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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Bo Zhang
    • 1
    • 2
    Email author
  • Dongfeng Ji
    • 1
  • Yingcun Min
    • 1
  • Yong Fan
    • 1
  • Xiaodong Chen
    • 3
  1. 1.School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengduChina
  2. 2.National Key Laboratory of Application Specific Integrated CircuitHebei Semiconductor Research InstituteShijiazhuangChina
  3. 3.School of EECSQueen Mary University of LondonLondonUK

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