Patent ID: 9502760
Filing Date: 2016-11-22
CPC Classification: G01S,H01Q

Claim Text:
1. A radar apparatus comprising: an antenna that performs at least one of transmission and reception of radar waves composed of radio waves of a predetermined frequency; and a radome having a transmission section that is a portion transmitting the radar waves therethrough and an attenuation section that is a portion attenuating the radar waves, wherein the attenuation section at least includes a first attenuation layer formed of a material that attenuates the radar waves, a second attenuation layer stacked onto the first attenuation layer and formed of a material having a dielectric constant that is different from that of the first attenuation layer and a third attenuation layer formed to sandwich the second attenuation layer between the first attenuation layer and the third attenuation layer; the first attenuation layer has a thickness that is 2n−1 times (n is a natural number) of one-quarter of a wavelength of the radar waves in the first attenuation layer; the second attenuation layer is formed of the same material as that forming the transmission section; and the third attenuation layer is formed of the same material as the material forming the first attenuation layer.