中国物理B ›› 2008, Vol. 17 ›› Issue (9): 3402-3406.doi: 10.1088/1674-1056/17/9/042

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Study of a rectangular coupled cavity extendedinteraction oscillator in sub-terahertz waves

张开春, 吴振华, 刘盛纲   

  1. THz Research Center, Research Institute of High Energy Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2007-09-14 修回日期:2008-04-16 出版日期:2008-09-08 发布日期:2008-09-08
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10676110) and the National Basic Research Program of China (Grant No 2007CB310401).

Study of a rectangular coupled cavity extendedinteraction oscillator in sub-terahertz waves

Zhang Kai-Chun(张开春)†, Wu Zhen-Hua(吴振华), and Liu Sheng-Gang(刘盛纲)   

  1. THz Research Center, Research Institute of High Energy Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2007-09-14 Revised:2008-04-16 Online:2008-09-08 Published:2008-09-08
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10676110) and the National Basic Research Program of China (Grant No 2007CB310401).

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摘要： An extended interaction oscillator (EIO) generating 120\,GHz wave in sub-terahertz waves is studied by using the three-dimensional electromagnetic simulation software CST and PIC codes. A rectangular reentrant coupled-cavity is proposed as the slow-wave structure of EIO. By CST, the circuit parameters including frequency-phase dispersion, interaction impedance and characteristic impedance are simulated and calculated. The operation mode of EIO is chosen very close to the point where $\beta L=2\pi$ with corresponding frequency 120\,GHz, the beam voltage 12\,kV and the dimensions of the cavity with the period 0.5\,mm, the height 3\,mm and the width 1.4\,mm. Simulation results of beam--wave interaction by PIC show that the exciting frequency is 120.85\,GHz and output peak power 465\,W with 12-period coupled-cavity with the perveance 0.17\,$\mu$P. Simulation results indicate that the EIO has very wide range of the operation voltage.

关键词: extended interaction oscillator (EIO), rectangular coupled-cavity, sub-terahertz (Sub-THz) waves, dispersion relation

Abstract: An extended interaction oscillator (EIO) generating 120 GHz wave in sub-terahertz waves is studied by using the three-dimensional electromagnetic simulation software CST and PIC codes. A rectangular reentrant coupled-cavity is proposed as the slow-wave structure of EIO. By CST, the circuit parameters including frequency-phase dispersion, interaction impedance and characteristic impedance are simulated and calculated. The operation mode of EIO is chosen very close to the point where $\beta L=2\pi$ with corresponding frequency 120 GHz, the beam voltage 12 kV and the dimensions of the cavity with the period 0.5 mm, the height 3 mm and the width 1.4 mm. Simulation results of beam--wave interaction by PIC show that the exciting frequency is 120.85 GHz and output peak power 465 W with 12-period coupled-cavity with the perveance 0.17 $\mu$P. Simulation results indicate that the EIO has very wide range of the operation voltage.

Key words: extended interaction oscillator (EIO), rectangular coupled-cavity, sub-terahertz (Sub-THz) waves, dispersion relation

中图分类号:  (Oscillators, pulse generators, and function generators)

  • 84.30.Ng
84.40.Dc (Microwave circuits) 84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)) 84.40.Xb (Telemetry: remote control, remote sensing; radar)