Experimental Study on Electromagnetic Shielding Characteristics of Conductive O-rings at High Frequencies

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  • 導電性Ｏリングの高周波電磁遮へい特性に関する実験的検討
  • ドウデンセイ Oリング ノ コウシュウハ デンジ シャヘイ トクセイ ニ カンスル ジッケンテキ ケントウ

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Abstract

The O-rings have been usually applied to mechanically moving parts for sealing oil and air and preventing dust so far. In order to measure the electromagnetic shielding effectiveness of the conductive O-rings, we proposed a electromagnetic shielding evaluation setup for the O-ring. There are two ways to apply O-rings in narrow gaps, cylinder-fixing and plane-fixing. By the use of this setup, the electromagnetic shielding effectiveness of conductive O-rings can be evaluated from 10kHz to 1GHz for both fixing types.<br>The reflection and transmission characteristics of this setup and measured results of electromagnetic shielding effects are described. Anisotropic conductivity of the ring material and an equivalent circuit of the O-rings are discussed.

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