Radar-absorbing surface element for a body component having a radar sensor and body component of a vehicle with a radar sensor

Abstract

Radar-absorbing surface element (1) for a vehicle body component (10) having a radar sensor, comprising a carrier plate 1.1 which is formed with a front side (1.10) structured in the direction of an incident radar radiation (S) to be absorbed, consisting of conical, pyramidal, cylindrical or cuboid-shaped knobs (1.2) and a structured rear side (1.11) consisting of conical, pyramidal, cylindrical or cuboid-shaped depressions (1.3).

Description

The invention relates to a radar-absorbing surface element for a body component having a radar sensor, and to a body component of a vehicle having a radar sensor and a radar-absorbing surface element. The invention further relates to a vehicle having a body component according to the invention.Radar sensors are increasingly being used in vehicles, which are generally mounted behind a grille or a bumper of the vehicle. With such radar sensors, many comfort and safety applications can be implemented, such as blind spot monitoring, distance regulation, collision detection, collision avoidance, lane change assist with blind spot detection and parking assist.A radar-absorbing surface element for a body component having a radar sensor and a body component of a vehicle having a radar sensor and a radar-absorbing surface element are known from US 2016 / 0268693 A1. This known surface element has on the surface a multiplicity of projections which are designed in the form of strips, pyramids, gratings, slits, cones, triangles, rectangles, circles or spheres. Instead of such surface elements with projections, surface elements with depressions are also described which are of strip-shaped, pyramidal, grid-shaped, slot-shaped, conical, triangular, rectangular, circular or spherical design. Such known surface elements are shown in FIGS. 1 and 2.From DE 11 2012 001 758 T5 a vehicle obstacle detection device for a radar system is known, which is arranged between a rear surface of a bumper and a wheel in order to detect an obstacle by transmitting a radio wave through the bumper. By a misdetection preventing member, misdetection in the radar apparatus is prevented by suppressing occurrence of a wave reaching the wheel of the own vehicle, which is part of a transmission wave and which passes between a transmitter portion of the radar apparatus and the rear surface of the bumper and reaches the wheel of the own vehicle. This misdetection preventing member is disposed on a rear surface of a rear bumper of the vehicle and has a surface having triangular or semicircular projections in cross section to achieve diffuse reflection of a transmission wave of the radar apparatus.Furthermore, according to this DE 11 2012 001 758 T5, a misdetection prevention element is described with a shielding element, the surface of which has elevations with a circular or convex lens-shaped cross section in order to achieve diffuse reflection of a transmission wave of the radar system.An arrangement for a motor vehicle having a bumper and having a radar sensor is known from DE 10 2012 017 669 A1, in which the radar sensor is designed in such a way that electromagnetic waves are emitted through the trim part and radiation echoes are received from the target objects in order to detect target objects. The radar sensor has an azimuthal detection angle, by which a field of view of the radar sensor in the azimuth direction is defined. Furthermore, the radar sensor is arranged at a distance from a rear side of the trim part, so that the azimuthal field of view of the radar sensor intersects the trim part in a section region. For absorbing interference waves outside the azimuthal detection angle, an absorption material is applied to the rear side of the cladding part in the azimuthal direction outside the cut region, wherein the cut region is free of the absorption material.DE 20 2009 012 591 U1 discloses a bumper arrangement with a bumper and with a radar transmitter and receiver. In such a bumper arrangement, unwanted path propagations occur as a result of reflections at parts of the bumper arrangement, at rotating parts of the motor or of the drive train, which can lead to interference with the useful signal. Such disturbances can also be caused by other sensors. To solve this problem, DE 20 2009 012 591 U1 proposes to equip the bumper arrangement with a shield which at least partially covers the region in which the radar transmitter and receiver is arranged. This shielding is intended to prevent the propagation of radio waves in the direction of the motor and in the direction of rotating parts of the drive train. Such a shield consists of metal sheet, for example a steel sheet or of a plastic which is bonded with a metal foil. It is also proposed to line the inside of the bumper or of the cladding or of the cover of the bumper arrangement partly with a metal foil or a metallized foil.Furthermore, WO 2016 / 037597 A1 discloses a sensor element of an inductive proximity or distance sensor, which has a coil arrangement with an excitation coil and a receiver coil. A shielding cup with a flange completely encloses the coil arrangement as an electrically conductive shielding. This shielding by means of the shielding cup shields in particular the higher-frequency electromagnetic signal components present on the rear side of the sensor element, so that the higher-frequency signal components of the electromagnetic fields radiated by the excitation coils only reach metallic surfaces, for example mounting components, which are positioned on the rear side of the sensor element, in a weakened manner or not at all.It is also known to use plastics with electromagnetic shielding action made of polyamide with a glass fibre content mixed therewith and electrically conductive particles, such as, for example, polyamide. The production of conductive carbon black can be carried out. The electrical conductivity of such a plastic material results in a high reflective and damping effect with respect to electromagnetic radiation, in particular radar radiation. The production of screens from such plastics by injection molding is expensive, and the high reflectivity of such plastics is also disadvantageous.It is an object of the invention to specify a radar-absorbing surface element for a vehicle body component having a radar sensor, with which the radar sensor is shielded with high radar-absorbing damping at low reflectivity and as a result multipath propagation is suppressed to the greatest possible extent. It is a further object of the invention to specify a body component of a vehicle having such a radar-absorbing surface element.The first-mentioned object is achieved by a radar-absorbing surface element having the features of patent claim 1.According to this solution, such a radar-absorbing surface element for a vehicle body component having a radar sensor comprises a carrier plate which is formed with a front side structured in the direction of incident radar radiation to be absorbed from conical, pyramidal, cylindrical or cuboidal knobs and a structured rear side from conical, pyramidal, cylindrical or cuboidal depressions.As a result, an electromagnetic wave initially incident on the knobs is optimally refracted into a "trap", from which the scattered radiation can no longer emerge or can emerge only to a small extent. Since this so-called "wave trap" is effective for many frequencies, this leads to broad-band attenuation.An advantageous embodiment of the invention provides that the conical nub has a conical shape with a base diameter of 1.2 times and a height of 1 times the smallest occurring wavelength of the radiation to be absorbed. With such a dimensioning of the structured front side of the carrier plate made of knobs, a particularly good radar-damping effect is achieved in the frequency range between 76 and 81 GHz.In order to improve broadband damping, it is provided according to a further embodiment of the invention that the radar-absorbing surface element is formed with a structured front side from conical knobs, wherein each knob has a lateral surface with conical depressions in a fractal and decreasing structure. This improves the attenuation over a larger frequency range. Preferably, the conical depressions are introduced into 120° sectors of the conical nub, wherein the reduction factor of the fractal structure is 0.67. It has been found here that the largest nub or depression is designed to the dimension of the lowest frequency of the frequency band, while the smallest nub or depression is designed to the highest frequency of the frequency band for which the damping effect is to be produced.The second object mentioned is achieved by a body component having the features of claim 5.According to this, such a body component of a vehicle comprises a radar sensor which is designed with a detection range of the surroundings of the vehicle, wherein at least one radar-absorbing surface element according to the invention is arranged outside the detection range of the radar sensor.In such a body component, the radar-absorbing surface element is realized in regions that are outside the detection range of the radar sensor, i.e., the space of the radar sensor to be detected is not impaired by this radar-absorbing surface. The detection range of the radar sensor is defined by an opening angle in which, on the one hand, the radar signals are transmitted into the space to be detected and, on the other hand, the radar signals reflected by an object are received.The radar-absorbing surface element is arranged directly on the body component and / or on the radar sensor.According to a preferred development of the invention, the radar sensor is arranged on the body component by means of a holder. Preferably, such a holder is formed with the radar-absorbing surface element.A further advantageous embodiment of the invention provides that the body component has a mounting opening in which the radar sensor is arranged with a radar housing, wherein the radar housing is formed with the radar-absorbing surface element.Furthermore, an absorber collar is arranged on the radar sensor, the absorber collar being formed with the radar-absorbing surface element outside the detection range of the radar sensor.The body member may be used as a bumper for the front side or rear side of a vehicle. Such a body component is suitable for use in all types of vehicles.The invention is described in detail below on the basis of exemplary embodiments with reference to the appended figures. The following are shown: FIG. 1 shows a schematic illustration of a radar-absorbing surface element having a structured front side with conical knobs according to the prior art, FIG. 2 shows a schematic illustration of a structured front side or rear side of a radar-absorbing planar element with truncated pyramid-shaped depressions according to the prior art, FIG. 3 shows a schematic illustration of a radar-absorbing surface element having a front side structured according to the invention with conical knobs and conical depressions, FIG. 4 is a perspective view of a conical nub with conical depressions arranged on the conical jacket, FIG. 5 shows a schematic illustration of a body component with a radar sensor installed on a bumper of a vehicle by means of a holder and with an absorber collar having a radar-absorbing surface element, FIG. 6 shows a perspective illustration of the absorber collar installed on the radar sensor according to FIG. 5 with a radar-absorbing surface element, and FIG. 7 shows a schematic illustration of a holder installed on a front corner of a vehicle, having a radar sensor and radar-absorbing surface elements.FIG. 1 shows a radar-absorbing surface element 1 for a body part 10 of a vehicle having a radar sensor 2 according to the prior art.This radar-absorbing surface element 1 consists of a carrier plate 1.1 with a structured front side 1.10 made of conical knobs 1.2. In this case, this radar-absorbing surface element 1 is directed in the direction of incident radar radiation S, which is intended to be attenuated by the structured front side 1.10.Instead of the conical knobs 1.2 according to FIG. 1, the structured front side 1.10 of the carrier plate 1.1 can be formed with pyramid-shaped, cylinder-shaped or cuboid-shaped knobs. Elliptical shapes of these geometries listed can also be used.The structured front side of the carrier plate 1.1 can also be realized with depressions 1.3 instead of the conical knobs 1.2, as can be seen from FIG. 2. The depressions 1.3 shown there have the geometric shape of a truncated pyramid. Instead of a truncated pyramid shape, other geometric shapes can also be used for these depressions 1.3, such as cones, pyramids, cylinders or cuboids, which also comprise elliptical shapes.The carrier plate 1.1 of the radar-absorbing surface element 1 is a plastic part and can be produced together with the structured front side 1.10 cost-effectively from polyamide (PA) by injection molding or by thermoplastic deformation. This material (for example. PA6) has an anisotropic damping effect with respect to radar radiation, i.e. has a natural damping effect.An electromagnetic wave S incident on the structured front side 1.10 of the carrier plate 1.1 is multiply reflected at the knobs 1.2 or in a respective depression 1.3. In this case, the knobs 1.2 or depressions 1.3 are configured geometrically (such as height, diameter etc.) in such a way that refraction components of the incident wave cancel out from adjacent knobs 1.2 or in a respective depression 1.3 and, in the course of a further refraction at a knob 1.2 or in a depression 1.3, penetrate into the plastic material of the carrier plate 1.1 and are converted into heat in the process by its natural damping property.The phase-wise extinction reduces the reflected power of an incident electromagnetic wave. All refraction components of such a wave that do not cancel each other out or do not cancel each other out completely are attenuated by the natural attenuation property of the material of the radar-absorbing surface element 1 and the scattered radiation is thereby reduced. Any scattered radiation that may remain is reduced by renewed refraction at the knobs 1.2 or in the depressions 1.3 by phase extinction and the material-related attenuation. This process is repeated until no scattered radiation, or any scattered radiation that can hardly be measured, occurs.Due to the structural shape of a nub 1.2 or a depression 1.3, optimum scattering and attenuation for an incident electromagnetic wave from different spatial directions is achieved.It has been found that, in the case of a conical nub 1.2 or a conical depression 1.3, an optimum extinction of an electromagnetic wave incident on the radar-absorbing front side 1.10 is achieved by arranging it at a specific distance. Furthermore, the cone angle of such a nub 1.2 or such a depression 1.3 is optimized in such a way that the scattered radiation repeatedly breaks at an adjacent nub 1.2 or in a depression 1.3 and is thereby reduced further in terms of power. Furthermore, the attenuation measure of an electromagnetic wave incident on the radar-absorbing front side 1.10 can be adjusted by the material thickness of the anisotropic material used.Thus, by optimized arrangement and dimensioning of the knobs 1.2 or the depressions 1.3 for a desired frequency range, a good damping effect with respect to scattered radiation of a radar sensor 2 can be achieved, wherein only a cost-effective standard plastic material can be used as material for the radar-absorbing surface element 1. The production of the carrier plate 1.1 with knobs 1.2 or depressions 1.3 by means of an injection molding method leads to better demolding of the injection molding tool if the knobs 1.2 or the depressions 1.3 have a conical shape. A further advantage consists in the realization of the knobs 1.2 or the depressions 1.3 in a conical shape, since optimum refraction and attenuation of an incident electromagnetic wave is achieved in all spatial directions, while specific spatial directions are promoted or impaired when a pyramid shape is used for the knobs 1.2 or the depressions 1.3.For a radar attenuating effect in a frequency range of 76 to 81 GHz, for example, a cone shape having a base diameter of 1.2 times the lower wavelength and a height of 1 times the lower wavelength is used. Thus, the base diameter of such a conical nub 1.2 is about 4 mm and its height is about 3.8 mm. An upper cone tip of, for example. 0.1 mm is not critical and is determined by limiting the production technology by the injection molding method.An improved damping effect of the radar-absorbing surface element 1 can be achieved in that its structured front side 1.10 consists both of knobs 1.2 and of depressions 1.3, as is schematically shown in FIG. 3. Good damping properties with respect to all relevant spatial directions are achieved in particular when the structure of knobs 1.2 and the structure of depressions 1.3 are realized alternately on the structured structured front side 1.10 of the radar-absorbing surface element 1 in accordance with the illustration according to FIG. 3. However, periodic structuring can lead to undesired elevations and reduce the damping effect. This disadvantage can be avoided if the structure consisting of knobs 1.2 and depressions 1.3 is randomly arranged on the structured front side 1.10 of the carrier plate 1.1.An improved broadband nature of the damping effect can be achieved by varying the knob size of the knobs 1.2 or the depth of the depressions 1.3 over the structured front side 1.10; in particular, it is advantageous if this variation takes place randomly. This also counteracts periodicity if the structured front side of the radar-absorbing surface element 1 consists of both knobs 1.2 and depressions 1.3. A reflection surface of an electromagnetic wave incident on the radar-absorbing surface element 1 is thus substantially reduced in all spatial directions and at the same time the effect over the frequency range of, for example, UV radiation is reduced. 76 to 81 GHz.A further improved damping effect is achieved in that the front side 1.10 is a structured surface made of knobs 1.2 and the rear side 1.11 (cf. FIG. 2 ) is likewise structured, but with depressions 1.3. This means that, with respect to the radar-absorbing front side 1.10 directed in the direction of the incident electromagnetic radiation S and having conical knobs 1.2, and the rear side 1.11 likewise has a structured surface, but not having knobs 1.2, but rather having depressions 1.3, as shown in FIG. 2.As a result, an electromagnetic wave incident on the front side 1.10 with the knobs 1.2 is optimally refracted into a so-called "wave trap" formed by the rear depressions 1.3, from which the scattered radiation can "escape" only with an extremely small proportion. The phase-related extinction effect is lower here, but this is substantially compensated for by the "wave trap" with the advantage that a high broadband characteristic of the attenuation is achieved.A further improved damping effect with high broadbandness is achieved by introducing further wave-refracting structures into the conical knobs 1.2 according to FIG. 1 or into the conical depressions 1.3. A conical nub 1.2 of this type is shown in FIG. 4, on the lateral surface of which small conical depressions 1.20 are introduced. In this case, the lateral surface of the conical nub 1.2 is divided into 120° sectors, in each of which a conical depression 1.20 is arranged. To produce a fractal structure, conical depressions are again arranged in each case in a 120° sector in the lateral surface of these conical depressions 1.20. This is continued until an upper limit frequency for which a damping effect is to be achieved is reached or manufacturing limits of the production method of the radar-absorbing surface element 1 with regard to the structure design occur. A reduction factor of 0.67 for a formation of the broadband has proven to be ideal for such a fractal structure. In this case, the largest nub 1.2 or the largest depression 1.3 is matched to the dimension of the lowest frequency of a frequency band, and the smallest nub 1.2 or the smallest depression 1.3 is matched to the highest frequency of the frequency band.FIG. 5 shows a detail of a rear bumper 10.0 as a body component 10 of a vehicle, on which a radar sensor 2 is mounted on the bumper 10.0 by means of a holder 3. Furthermore, an absorber collar 4 shown in FIG. 6 is clipped onto the radar sensor 2, which has a radar-absorbing surface element 1 for realizing a radar-absorbing function for suppressing multipath propagation.This absorber collar 4 is constructed in the manner of a frame by means of four side parts 4.1 to 4.4, wherein the absorber collar 4 is clipped onto the radar sensor 2 by means of latching hooks 4.10 arranged on the side parts 4.1 and 4.3. In this position clipped onto radar sensor 2, a front side 2.0 of radar sensor 2 is framed, a part of this front side 2.0 being covered by a web 4.0 of absorber collar 4, which connects opposite side parts 4.1 and 4.3 on the edge side.To implement the radar-absorbing function, this absorber collar 4 has at least one radar-absorbing surface element 1, which covers at least one spatial region lying outside a detection range of the radar sensor 2, from which radiation of multipath propagation of the radar radiation emitted by the radar sensor 2 is expected. According to FIGS. 5 and 6, the web 4.0 is designed as a carrier plate 1.1 of a radar-absorbing surface element 1, wherein the structured front side 1.10 has conical knobs 1.2.This web 4.0, which is designed as a radar-absorbing surface element 1, can also be realized in the variants explained above with regard to the structuring of the front side 1.10 and the rear side 1.11.This also includes the formation of the rear side 1.11 of this web 4.0 additionally with depressions 1.3, which are formed, for example, in a conical manner.In order to cover all spatial directions of the absorber collar 4 mounted on the radar sensor 2, from which scattered radiation is expected, the side parts 4.1, 4.2, 4.3 and 4.4 can also be produced in each case as a carrier plate 1.1 of a radar-absorbing surface element 1 having an outwardly directed structured front side 1.10 with conical, pyramidal, cylindrical or cuboidal knobs 5.1 and conical, pyramidal, cylindrical or cuboidal depressions 5.2. In accordance with the above-described manner, the inner sides of these side parts 4.1 to 4.4 can also be structured with depressions 1.3 as rear side 1.11 of the radar-absorbing surface elements 1. The decisive factor for which surfaces of the absorber collar 4 are produced as a radar-absorbing surface element 1 is the expected spatial directions from which scattered radiation is expected. These surfaces are located outside the detection range of radar sensor 2.In the arrangement according to FIG. 5, alternatively or additionally the radar housing 2.1 of the radar sensor 2 can be produced in such regions with a radar-absorbing surface element 1 from which scattered radiation is expected. The decisive factor for this is also that such regions of the housing 2.1 are produced as radar-absorbing surface element 1, which could be struck by scattered radiation. These regions of the housing 2.1 are also located outside the detection range of the radar sensor 2. In accordance with the above-described manner, the inner sides of the housing 2.1 can also be additionally structured with depressions 1.3. Such a radar housing 2.1 with radar-absorbing surface elements 1 can be produced cost-effectively from a polyamide as plastic part by means of an injection molding process.In the arrangement according to FIG. 5, in an embodiment of the absorber collar 4 with radar-absorbing surface elements 1 and / or of the radar housing 2.1 with radar-absorbing surface elements 1, the holder 3 can also be made of a cost-effective plastic material, such as, for example. Polyamide can be prepared.FIG. 7 shows a detail of the front corner of a front bumper 10.0 as a body component 10 of a vehicle, on which a holder 3 is mounted, wherein a radar sensor 2 is arranged in a mounting opening 3.1 of the holder 3.The holder 3 according to FIG. 7 is made of a cost-effective plastic material, such as, for example. The surface elements are made of polyamide and have radar-absorbing surface elements 1 in those regions on which scattered radiation could strike and which lie outside the detection range of radar sensor 2. These radar-absorbing surface elements 1 are designed according to the above explanations with a structured front side 1.10 made of conical, pyramidal, cylindrical or cuboidal knobs 1.2 and conical, pyramidal, cylindrical or cuboidal depressions 1.3 and are indicated only schematically in FIG. 7. According to the above embodiments, the back sides of these absorbent sheets 1 can also be additionally formed with depressions 1.3.In the arrangement according to FIG. 7, alternatively or additionally the radar housing 2.1 of the radar sensor 2 can be produced in such regions with a radar-absorbing surface element 1 with a structured front side 1.10 from conical, pyramidal, cylindrical or cuboidal knobs 1.2 and conical, pyramidal, cylindrical or cuboidal depressions 1.3. The decisive factor for this is also that those regions of the housing 2.1 are produced with a radar-absorbing surface element 1, which could be struck by scattered radiation. These regions of the housing 2.1 are also located outside the detection range of the radar sensor 2. In accordance with the above-described manner, the rear sides 1.11 of the radar-absorbing surface elements 1 can also be additionally structured with depressions 1.3. Such a radar housing 2.1 with radar-absorbing surface elements 1 can be produced cost-effectively from a polyamide as plastic part by means of an injection molding process.In the exemplary embodiments of a body component 10 according to FIGS. 5 and 7, radar sensor 2 is mounted on body component 10 designed as a bumper 10.0 by means of a holder 3. It is also possible to form the body component 10, for example the bumper 10.0, with a mounting opening for the radar sensor 2, so that the radar sensor 2 can be mounted directly, i.e. without a holder 3, on the body component 10.Such a bumper 10.0 is made of a cost-effective plastic material, such as, for example. The surface elements of the polyamide are made of polyamide and have radar-absorbing surface elements in those regions on which scattered radiation could strike and which lie outside the detection range of the radar sensor. These radar-absorbing surface elements are formed according to the above explanations with a structured front side of conical, pyramidal, cylindrical or cuboidal knobs and conical, pyramidal, cylindrical or cuboidal depressions. According to the above explanations, the rear sides of these radar-absorbing surface elements can also be additionally formed with depressions.In such an arrangement, alternatively or additionally, the radar housing of the radar sensor can be produced with radar-absorbing surface elements having a structured front side from conical, pyramidal, cylindrical or cuboidal knobs and conical, pyramidal, cylindrical or cuboidal depressions in such regions on which scattered radiation could impinge and which lie outside the detection region of the radar sensor. According to the above-described manner, the back surfaces of the radar absorbing surface elements corresponding to the inner sides of the radar housing can also be patterned with depressions.Reference numerals denote reference numerals1 Radar-absorbing surface element 1.1 Support plate of the radar-absorbing surface element 1 1.10 Front side of the support plate 1.1 1.11 Rear side of the support plate 1.1 1.2 Nub of the front side 1.10 1.20 Depression on the lateral surface of the nub 1.2 1.3 Depression 2 Radar sensor 2.0 Front side of the radar sensor 2 2.1 Housing of the radar sensor 2 3 Holder of the radar sensor 2 3.1 Mounting opening of the holder 3 4 Absorber collar of the radar sensor 2 4.0 Web of the absorber collar 4 4.1 Side part of the absorber collar 4 4.10 Latching hooks of the absorber collar 4 4.2 Side part of the absorber collar 4 4.3 Side part of the absorber collar 4 4.4 Side part of the absorber collar 4 10 Body component 10.0 Bumper

Claims

Radar-absorbing surface element (1) for a body component (10) of a vehicle having a radar sensor, having a carrier plate 1.1, which is formed with a front side (1.10), structured in the direction of incident radar radiation (S) to be absorbed, made of conical, pyramidal, cylindrical or cuboidal knobs (1.2) and a structured rear side (1.11) made of conical, pyramidal, cylindrical or cuboidal depressions (1.3).Radar-absorbing surface element (1) according to one of the preceding claims, in which the conical nub (1.2) has a conical shape with a base diameter of 1.2 times and a height of 1 times the smallest occurring wavelength of the radar radiation (S) to be absorbed.Radar-absorbing surface element (1) according to one of the preceding claims, in which each nub (1.2) has a lateral surface with conical depressions (1.20) in a fractal and decreasing structure.Radar-absorbing surface element (1) according to Claim 3, in which the conical depressions (1.20) are introduced into 120° sectors of the conical nub (1.2), the reduction factor of the fractal structure being 0.67.Body component (10) of a vehicle having - a radar sensor (2) which is formed with a detection region of the surroundings of the vehicle, and - at least one radar-absorbing surface element (1) according to one of the preceding claims, which surface element is arranged outside the detection region.Vehicle body component (10) according to Claim 5, in which the radar sensor (2) is arranged on the vehicle body component (10) by means of a holder (3).Body component (10) according to Claim 6, in which the holder (3) is formed with the at least one radar-absorbing surface element (1).Body component (10) according to Claim 5, having a mounting opening in which the radar sensor having a radar housing (2.1) is arranged, the radar housing (2.1) being formed with the at least one radar-absorbing surface element (1).Vehicle body component (10) according to Claim 6, in which - a frame-like absorber collar (4) is arranged on the radar sensor (2), and - the absorber collar (4) is formed outside the detection region with the at least one radar-absorbing surface element (1).Body component (1) according to one of Claims 5 to 9, in which the body component (1) is designed as a bumper (1.0) having the at least one radar-absorbing surface element (1).Vehicle having a body component (1) according to one of Claims 5 to 10.

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