| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the design of a vehicle and to reduce the number of part items without impairing radar function by disposing a radar body on the back face side of a bumper of a vehicle, and forming a radome part of a part of the bumper of the vehicle. SOLUTION: A radar body 1 is disposed on the back face side of a bumper 30, and a part of the bumper 30 is used as a radome part of the radar body 1. The radar body 1 has a transmitting antenna 11 and a receiving antenna 12, and at least the radome part of the bumper 30 is formed of dielectric material excellent in radio wave penetrability. The thickness (tc) of the radome part of the bumper 30 is set to the value satisfying an expression, whereεc is the dielectric constant of the bumper 30,θi is the incident angle of radio wave to the bumper 30, (n) is a natural number, andλo is the free space wavelength of radio wave. With this structure, the external design of a vehicle is improved, and the number of part items can be reduced without impairing radar function.</p> |
