Doppler radar mounting structure for motor vehicles

摘要

A mounting structure of a Doppler radar vehicle speed sensor for an automobile, especially adapted for damage-free mounting of the radar to a bottom of the automobile which may detrimentally hit on the road surface while the automobile is in motion. In order to protect the radar casing from the attacks by possible flying pebbles and muddy splashes caused by the rotation of the front wheels, the radar casing containing a horn antenna or a slot array antenna is accommodated in a recess or a stepped space formed near the rear wheels in the bottom surface of the floor of the automobile in such a manner that the casing is within the partial space in the recess lying on the side opposite to the road surface with respect to a plane containing the front edge of the recess and the tangent line drawn from the front edge to the outer diameter of the front wheel. The mouth of the antenna is directed toward the rear end of the automobile.