| 摘要 |
A vehicle surroundings monitoring device capable of performing distance measurement as desired even in a short-distance range to provide unerring alarm information to a driver. The monitoring device for monitoring surroundings around a vehicle has a transmitting antenna provided in a door mirror assembly of the vehicle to radiate transmitted waves through a mirror surface of the door mirror, and a receiving antenna provided in the door mirror assembly to receive reflected waves from an object existing near the vehicle through the door mirror surface. The monitoring device also has a stray electric wave limiting member for reducing electric wave components straying from the transmitting antenna into the receiving antenna. The stray electric wave limiting member is formed as an electric wave absorbing member provided between opening surfaces of the door mirror corresponding respectively to the transmitting and receiving antennas, a metal plate provided between the transmitting and receiving antennas, an electric wave absorbing member provided between the transmitting and receiving antennas and the door mirror except in front of the opening surfaces of the door mirror corresponding to the antennas, or a matching layer provided between the antennas and the door mirror.
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