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Design and Evaluation of Broad-Band High Pass Filter of Metal Perforated Sheets for Microwave Diagnostics

Akira TANI, Hayato TSUCHIYA¹⁾, Mayuko KOGA and Yoshio NAGAYAMA¹⁾

Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, Japan

1)

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

(Received 27 November 2015 / Accepted 3 February 2016 / Published 17 March 2016)

Abstract

This paper reports characteristic evaluations of perforated metal sheet type high pass filters for milli- or microwave by numerical analysis and the guiding principle of designing broad-band high pass filters. The broad-band filters will be used for the microwave plasma diagnostics such as ECE, interferometer and reflectometer. We used 3D-modeling electromagnetic field calculation code to take complex interferences into account. The validity of the numerical analysis is guaranteed by a good agreement between calculated results and measured results. It is found that the frequency characteristic over the cut-off frequency depends on the filter thickness and that a thin filter is desirable for the ideal broad-band frequency filter.

Copyright (c) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

ECE, microwave diagnostics, millimetric-wave, perforated metal sheet, broad-band high pass filter, 3D numerical analysis, Efield

DOI: 10.1585/pfr.11.2405027

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References

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• [5] http://www.iti-global.com/
• [6] https://www.esi-group.com/