抄録
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.
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.
