Design of a 75-140 GHz high-pass printed circuit board dichroic filter

Dong Hwi Kim; Wahab Mohyuddin; Dong Sik Woo; Hyun Chul Choi; Kang Wook Kim

doi:10.1063/1.4977935

Design of a 75-140 GHz high-pass printed circuit board dichroic filter

Dong Hwi Kim, Wahab Mohyuddin, Dong Sik Woo, Hyun Chul Choi, Kang Wook Kim

School of Electronics Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

A new high-performing PCB (Printed Circuit Board) dichroic filter, which can be used for the KSTAR (Korea Superconducting Tokamak Advanced Research) electron cyclotron emission imaging system, is proposed. The current dichroic filter consists of a triangular lattice array of circular holes on the 6-mm thick metal plate, while circular hole spacing limitation caused relatively narrow passband (∼20 GHz). On the other hand, the proposed PCB dichroic filter utilizes the inexpensive commercial PCB fabrication process with a flexible adjustment of circular hole spacing. Therefore, the proposed PCB dichroic filter provides significantly wider passband (∼60 GHz with 0.84 dB insertion loss) with much reduced weight and expense. Also, it is shown that a steep skirt property can be obtained with the thick PCB filter substrate. The design process, fabrication, and measurement results of the new PCB dichroic filter are described.

Original language	English
Article number	034704
Journal	Review of Scientific Instruments
Volume	88
Issue number	3
DOIs	https://doi.org/10.1063/1.4977935
State	Published - 1 Mar 2017

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abstract = "A new high-performing PCB (Printed Circuit Board) dichroic filter, which can be used for the KSTAR (Korea Superconducting Tokamak Advanced Research) electron cyclotron emission imaging system, is proposed. The current dichroic filter consists of a triangular lattice array of circular holes on the 6-mm thick metal plate, while circular hole spacing limitation caused relatively narrow passband (∼20 GHz). On the other hand, the proposed PCB dichroic filter utilizes the inexpensive commercial PCB fabrication process with a flexible adjustment of circular hole spacing. Therefore, the proposed PCB dichroic filter provides significantly wider passband (∼60 GHz with 0.84 dB insertion loss) with much reduced weight and expense. Also, it is shown that a steep skirt property can be obtained with the thick PCB filter substrate. The design process, fabrication, and measurement results of the new PCB dichroic filter are described.",

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Design of a 75-140 GHz high-pass printed circuit board dichroic filter

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