A 105 GHz Notch Filter for mm-Wave Plasma Diagnostics

摘要：

Notch filters are the most important mm-wave components to protect front-end receivers from intensive gyrotron stray radiation in fusion plasmas. Here we describe a notch filter design with 105 GHz center frequency and 200 MHz rejection bandwidth. The design is based on a fundamental rectangular waveguide with cylindrical cavities coupled by narrow iris gaps, i.e. small elongated holes of negligible thickness. We use numerical simulations to study the sensitivity of the notch filter performance to changes in geometry and in material properties within a total bandwidth of ±10 GHz. The typical insertion loss in the passband is below 1.5 dB, and the attenuation in the stopband is approximately 40 dB.

作者: V.Furtula M.Stejner P.K.Michelsen F.Leipold M.Salewski T.Johansen S.B.Korsholm F.Meo D.Moseev S.K.Nielsen

作者单位: Association Euratom - RisΦ National Laboratory for Sustainable Energy,Technical University of Denmar DTU Elektro, Technical University of Denmark, DK-2800 Lyngby, Denmark

会议类型: 国际会议

会议名称: The 16th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating(第十六届电子回旋放射和电子回旋共振加热会议(EC-16)

会议地点: 三亚

会议语种:英文

页码: 228-233

在线出版日期: 2010-04-12（万方平台首次上网日期，不代表论文的发表时间）