Patent ID: 8487820

Claim:
An emblem configured to be arranged on a traveling path of a radar wave that is transmitted from an in-vehicle radar apparatus, the emblem comprising: a first thickness portion having a first thickness measured from a point of incidence of the radar wave on the emblem to a point of exit of the radar wave from the emblem; and a second thickness portion having a second thickness thinner than the first thickness, the second thickness measured from a point of incidence of the radar wave on the emblem to a point of exit of the radar wave from the emblem, wherein the first thickness is equal to an integral multiple of a half of an in-medium wavelength of the radar wave which is a wavelength of the radar wave when propagating inside the first thickness portion, the second thickness is a thickness equal to an integral multiple of a half of the in-medium wavelength of the radar wave which is a wavelength of the radar wave when propagating inside the second thickness portion, a difference between the first thickness and the second thickness is set to an integral multiple of a free-space wavelength of the radar wave which is a wavelength of the radar wave when propagating through a free space, and relative dielectric constants of the first thickness portion and the second thickness portion are within a range of a square number plus or minus a tolerance, where the square number is larger than one.