| abstract |
(57) [Summary] [Problem] To provide a radio wave absorber in which Γ is 6 dB or more regardless of frequency at 18 to 100 GHz. A radio wave absorber having a conductor layer and a dielectric layer, wherein the thickness of the dielectric layer is 5 mm or less, A radio wave absorber whose return loss (Γ) at 18 GHz, 50 GHz, 75 GHz, and 100 GHz is 6 dB or more. |