Radar sensor with frontal and lateral emission
First Claim
1. 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, andtilting 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/orc) 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A radar sensor includes a housing of radar-transmissive material, a circuit board in the housing, first and second antennas of several patch elements on the same or opposite surfaces of the circuit board, and a metal or metallized support supporting a rear surface of the circuit board. The first antenna has a beam axis that extends out through a front of the housing at an angle in a range from 45° to 90° relative to the circuit board plane. The sensor further includes a beam deflection structure arranged within the housing to deflect a beam axis of the second antenna out through the housing at an angle in a range from 0° to 45° relative to the circuit board plane.
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Citations
18 Claims
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1. A radar sensor for recording the environment of a motor vehicle, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A radar sensor comprising:
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a housing of a radar-transmissive material; a circuit board arranged within said housing; a first antenna comprising plural patch elements on a front surface of said circuit board, and having a first beam axis that extends out through a front of said housing at an angle in a range from 45°
to 90°
relative to a plane of said circuit board;a second antenna comprising plural patch elements on said front surface or on a rear surface of said circuit board; a metal or metallized support that is arranged within said housing and that supports said rear surface of said circuit board; and a beam deflection structure that is arranged within said housing and that is configured and positioned to deflect a second beam axis of said second antenna out through a side of said housing at an angle in a range from 0°
to 45°
relative to said plane of said circuit board,wherein said beam deflection structure comprises a metal or metallized radar reflective surface, a radar waveguide structure or a dielectric radar deflection structure, and wherein said beam deflection structure is formed in or on said support or said radar-transmissive material of said housing at a location perpendicularly adjacent to said second antenna relative to said plane of said circuit board.
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Specification