Patent ID: 7408500
Filing Date: 2008-08-05
Classification: G01S,H01Q

Abstract:
1. A monopulse radar comprising: a transmitting antenna and receiving antennas arranged on the top face of a grounding conductor plate; and a radar transmitter/receiver apparatus for supplying a signal to the transmitting antenna and detecting the azimuth of an obstacle from signals of a wave reflected by the obstacle and received by the receiving antennas, wherein the azimuth of the obstacle is detected based on at least one of the parameters including amplitude and phase of received signals each received through each of said receiving antennas, and wherein a diffracted wave prevention structure extends along at least two edges of the top face of said grounding conductor plate in a direction of a boundary between said transmitting antenna and said receiving antennas, said diffracted wave prevention structure being arranged to prevent a diffracted wave being generated through radiation from the transmitting antenna, reflection by the obstacle and diffraction at the edges and then being received by the receiving antenna.