Anti-collision vehicle radar system

Abstract

The anti-collision vehicle radar system overcomes interference problems due to radar beams from similar radar systems on other vehicles by providing a radar transmitter having a transmitting antenna which transmits a radar beam having circular polarization with a particular direction of rotation of the polarization, a radar receiver for receiving the radar beam after reflection thereof and including a receiving antenna having means for discriminating in favor of received signals having circular polarization with said particular direction of rotation while discriminating against received signals having circular polarization with the opposite direction of rotation of the polarization, the receiving antenna thereby being effective to discriminate in favor of a reflected radar beam from the associated transmitting antenna while discriminating against any interfering radar beam from another vehicle radar system, and utilization means connected to the receiver for utilizing received radar signals to control the operation of the vehicle. For example, the brakes of the vehicle may be applied if the received radar signals indicate that the vehicle must be stopped to avoid a collision. The transmitting and receiving antennas may include helical antenna elements which are coiled in opposite directions to achieve such discrimination.

Dependencies are inferred from the claim text.