Patent ID: 8593333

Claim:
A radar sensor for recording the environment of a motor vehicle, comprising: transmission means for emitting transmission signals using several transmitter antennas; receiving means for receiving transmission signals reflected by objects using several receiver antennas; and signal processing means for processing the received signals, wherein: each one of the several transmitter antennas and several receiver antennas respectively includes at least one transmitting or receiving individual antenna element, referred to henceforth as an elemental emitter, which is located on a front or rear face of a planar circuit board, said transmitter and receiver antennas include at least one first transmitter antenna and at least one first receiver antenna, which each respectively include at least one said elemental emitter located on the planar circuit board, wherein a beam axis of said first transmitter antenna and of said first receiver antenna outside the radar sensor is tilted at most 45° relative to a perpendicular on the circuit board, said transmitter and receiver antennas include at least one second transmitter antenna and at least one second receiver antenna, which each respectively include at least one said elemental emitter on the planar circuit board, wherein a beam axis of said second transmitter antenna and of said second receiver antenna outside the radar sensor is tilted at least 45° relative to the perpendicular on the circuit board, the elemental emitters have a printed structure, and a native beam axis of the elemental emitters without deflection is oriented at least approximately perpendicular to the circuit board whereby said elemental emitters are therefore henceforth referred to as frontal elemental emitters, and tilting the beam axis of these frontal elemental emitters and thereby realizing deflected laterally emitting elemental emitters is achieved by at least one of the following features: a) deflection of a beam path of the elemental emitters with metallic or metallized planar or curved reflective surfaces arranged over the elemental emitters, wherein the reflective surfaces are surfaces of an internal support or of a housing of the radar sensor, b) deflection of the beam path of the elemental emitters with waveguide structures, and/or c) deflection of the beam path of the elemental emitters with suitably formed structures of dielectric material arranged over the elemental emitters, wherein the dielectric material is a material of at least a part of a plastic housing of the radar sensor.