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QUASI-MILLIMETER WAVE/MILLIMETER WAVE BAND ELECTRIC WAVE ABSORPTION SHEET AND QUASI-MILLIMETER WAVE/MILLIMETER WAVE BAND ELECTRIC WAVE ABSORPTION METHOD
QUASI-MILLIMETER WAVE/MILLIMETER WAVE BAND ELECTRIC WAVE ABSORPTION SHEET AND QUASI-MILLIMETER WAVE/MILLIMETER WAVE BAND ELECTRIC WAVE ABSORPTION METHOD
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机译：准毫米波/毫米波带电波吸收片和准毫米波/毫米波带电波吸收方法
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摘要
The present invention provides a light-weight and flexible sheet-like electric wave absorber particularly having an excellent electric wave absorption performance in the frequency of a quasi-millimeter wave band. This quasi-millimeter wave/millimeter wave band electric wave absorption sheet is provided with: an electric wave reflection layer (A); and an electric wave absorption layer (B) that is disposed in parallel on top of the electric wave reflection layer (A), wherein the film thickness of the electric wave absorption layer (B) is within the range of 400-1000 µm, regarding the relative permeability (µr=µ'+µ"i) of the electric wave absorption layer (B) in a frequency of 24 GHz, a real part µ' is 1.0-1.50, and the absolute value of an imaginary part µ" is 0 or more but less than 1.0, and regarding the relative dielectric constant (ɛr=ɛ'+ɛ"i) of the electric wave absorption layer (B) in the frequency of 24 GHz, a real part ɛ' is 14-25, and the absolute value of an imaginary part ɛ" is in the range of 4-10.
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