To provide a matching radio wave absorbing body which can be easily regulated in matching frequencies and whose matching frequencies can be widened in band width.
A matching-type radio wave absorbing body is equipped with a radio wave absorbing medium lined with a metallic body. The radio wave absorbing medium is a magnetic material layer, and a laminate composed of a radio wave absorbing medium layer and the metallic layer is laminated into a laminate which functions as a resonator possessed of two resonant modes of two different resonant frequencies to the radio wave absorbing medium layer of the same thickness as that of the laminate. The resonant frequency f1 of one resonant mode out of two different resonant modes that belong to the resonator is less than frequencies where the frequency dispersion of the permeability of the radio wave absorbing medium becomes a constant, the other resonant frequency f2 is more than the frequencies where the frequency dispersion of the permeability of the radio wave absorbing medium becomes a constant. By a combination of these two modes, the radio wave absorption characteristics of a radio wave absorbing body of this constitution is determined on a load Q in a state where two modes are combined, and the radio wave absorbing body is widened in the band width of radio waves to absorb. A resonator is regulated in operating frequency band by adjusting a radio wave absorbing medium layer in thickness and permittivity.
ODA KIICHI
KONISHI KOICHI
KOKUSAI KIBAN ZAIRYO KENKYUSHO
Sugano Naka
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