Wave absorber
AssigneeSekisui Chemical Co., Ltd.
InventorsKatsunori MUTOU, Sachiko NAKAO, Hideki HAYASHI
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Abstract
An object of the present invention is to provide a radio wave absorber having excellent radio wave absorption against oblique incidence, particularly against oblique incidence of radio waves at around 79 GHz. The object can be achieved by a radio wave absorber having characteristic A: an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TM polarization measurement at 45° incidence and/or characteristic B: an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TB polarization measurement at 45° incidence.
Claims14
A radio wave absorber having
- characteristic A:
- an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TM polarization measurement at 45° incidence and/or
- characteristic B:
- an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TE polarization measurement at 45° incidence.
A λ/4 radio wave absorber member comprising a resistive film and a dielectric layer,
- the λ/4 radio wave absorber member having
- characteristic A:
- an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TM polarization measurement at 45° incidence when an aluminum plate with a thickness of 10 μm is stacked on the other side of the dielectric layer, and/or
- characteristic B:
- an absorption range with absorption performance of 15 dB or more within the frequency band of 75 to 85 GHz of 4 GHz or more in a TE polarization measurement at 45° incidence when an aluminum plate with a thickness of 10 μm is stacked on the other side of the dielectric layer.
Dependencies are inferred from the claim text.