Patent ID: 7151482

Claim:
An antenna configuration for a radar device, comprising: a plurality of transmission antennas over which an electric wave is transmitted to a target, the plurality of transmission antennas being evenly spaced from one another by a first predetermined interval (D); a plurality of reception antennas over which the transmitted wave is received when reflected from a target, the plurality of reception antennas being evenly spaced from one another by a second predetermined interval (d); and a plurality of channels each formed by a combination of one of the plurality of transmission antennas and one of the plurality of reception antennas, the plurality of channels being arranged into channel groups comprising channels using a same one of the plurality of transmission antennas, wherein each of the channel groups includes at least one channel having a path length equal to the path length of at least another channel in another channel group using an adjacent transmission antenna, and a number of channels varied in path length by a fixed distance over all the plurality of channels is larger than a number of the plurality of reception antennas.