A cover for a radar device

Abstract

A cover 200 for a RADAR device 300 for a vehicle comprising an external surface 204, an internal surface 206 and a heating device 230 coupled to the internal surface 206. The heating device 230 is arr

Description

TECHNICAL FIELD The present disclosure relates to a cover for a radar device. Aspects of the invention relate to a cover, to a panel for a vehicle, and to a radar assembly. BACKGROUND It is known to provide a radar device on a vehicle for the detection of objects. In order to protect the radar device, a cover may be arranged over the radar device. However, snow and ice may build up on the cover in cold conditions and may cause incorrect readings from the radar. A heater may be included within the cover in order to melt snow and ice, to improve the reliability of the radar device in cold conditions. In order to avoid the heater or cover interfering with the detection capability of the radar, the heater and cover must fulfil particular criteria such as having a particular thickness and smoothness. Fulfilling such criteria may result in a significant manufacturing cost. It is an aim of the present invention to address one or more of the disadvantages associated with the prior art. SUMMARY OF THE INVENTION Aspects and embodiments of the invention provide a cover for a radar device, a panel for a vehicle, a radar assembly, and a vehicle as claimed in the appended claims. According to an aspect of the present invention there is provided a cover for a radar device for a vehicle, the cover comprising: a cover member comprising: an external surface arranged to face outwardly from the radar device, the external surface being substantially flat and extending a first distance in a first direction, and an internal surface arranged to face the radar device such that the internal surface overlaps the entire external surface in a direction normal to the external surface, and a heating device coupled to the internal surface of the cover member and arranged to heat the external surface, the heating device overlapping the entire external surface in a direction normal to the external surface, wherein the internal surface extends at least a second distance in the first direction, the second distance being greater than the first distance. The internal surface and the heating device may each extend at least the second distance in the first direction, the second distance being greater than the first distance. In order for the radar device to function accurately, the cover should have a substantially constant thickness throughout the area of the cover where a detection volume of the radar passes through the cover. In order to maintain a uniform thickness, the heating device should extend over the entire area of the cover that the detection volume of the radar passes through. However, edge conditions of the heating device, such as turns of heating wire and edges of adhesive film used to affix the heating device may alter the effective thickness of the cover. By providing a larger internal surface of the cover member for supporting the heating device, the edges of the heating device may be arranged outside the detection volume of the radar. Further, the external surface of the cover must be flat to within a small tolerance, which may be achieved by machining of the external surface. Since it is labour intensive and expensive to provide a flat surface over a large area, the external surface may be made smaller than the internal surface in order to save costs. In this respect, it is noted that the term “flat” is intended to relate to a low surface roughness of the external surface, as opposed to a macroscale planar property. The external surface and / or the internal surface may be planar or may be curved. In particular, the external surface and / or the internal surface may be curved such that the surface(s) have a constant distance to the radar device. The internal surface may be considered to comprise a first portion that corresponds to the external surface and a border portion adjacent to the first portion, the first portion and the border portion being substantially continuous. The heating device may extend over the first portion and the border portion. The heating device may comprise an electrically conductive wire arranged to provide ohmic heating, and the electrically conductive wire may optionally comprise linear portions extending in the first direction. An electrically conductive wire may provide a low-profile heating device that may provide heat to be transferred directly to the cover by conduction, allowing efficient heating of the cover to melt snow or ice that may be on the external surface of the cover. The linear portions may be generally straight or may have a slight curve or zig-zag shape. The linear portions may provide the heating device with a substantially uniform thickness in the area where the linear portions extend. The linear portions may be arranged over a portion of the internal surface that corresponds to the external surface. The linear portions may therefore extend at least the first distance in the first direction. The external surface may represent an area of the cover where a detection volume of a radar device intersects the cover. By providing the linear portions extending over the area that intersects the detection volume, the cover may have a substantially constant thickness throughout the detection volume. In this way, the cover may not interfere with the radar. The electrically conductive wire may comprise turns, the turns being arranged to couple adjacent linear sections of the electrically conductive wire, the turns being arranged outside a portion of the internal surface that overlaps the external surface. Since the turns may represent an edge of the heating device and may therefore cause an adjacent portion of the coverto have a non-uniform thickness, by arranging the turns of the heating device outside the portion of the internal surface that overlaps the external surface, the turns should be arranged outside the radar detection volume such that the turns do not interfere with the radar. The cover may further comprise an adhesive film arranged to couple the electrically conductive wire to the internal surface. An adhesive film may provide a simple and straightforward means to couple the electrically conductive wire to the internal surface. The adhesive film and the electrically conductive heating wire may be coupled together at a location away from the cover member and subsequently attached thereto. This may allow greater flexibility in the assembly process. The adhesive film may extend at least the second distance in the first direction. In this way, the edge of the adhesive film may be arranged outside the radar detection volume. This may allow the cover to have a substantially constant thickness throughout the radar detection volume. The cover member may extend a shorter distance in the first direction than in a second direction perpendicular to the first direction. The radar detection volume and / or the external surface may have a shorter extent in the vertical direction than in the horizontal direction. It may be advantageous to orientate the electrically conductive heating wire in the direction where the radar has a shorter extent for ease of manufacture. This may result in turns or other edge details of the heating device being arranged outside the radar detection volume. The cover member may further comprise a stepped surface, the stepped surface being arranged adjacent to the external surface, and the cover member may be thinner in the region corresponding to the stepped surface than in a region corresponding to the external surface. The stepped surface may overlap a border portion of the internal surface, i.e. a portion of the internal surface of the cover member that does not overlap the external surface in a direction normal to the external surface. The stepped surface may be arranged to engage an adjacent component such as a dust cover. In this way, the portion of the cover member outside the radar detection volume may have a dual purpose of engaging with an adjacent component on an external side and supporting edge details of a heating device on an internal side. According to a further aspect of the present invention, there is provided a vehicle panel, the vehicle panel comprising: a cover according to the first-mentioned aspect; and a dust cover surrounding the cover. The dust cover may reduce the ingress of dust and road dirt into the inside of the vehicle. In some cases, the cover may be arranged within the front fender, and the front fender may be considered as a dust cover. The dust cover may be a front grille of a vehicle, which may have portions that are openable selectively in order to allow airflow into the vehicle when desired and to restrict airflow when desired. The cover may comprise a stepped surface and the dust cover may overlap and engage the stepped surface. The stepped surface may engage with the dust cover to provide a substantially flat and therefore more aerodynamic front of a vehicle. Further, the engagement between the dust cover and the stepped surface may provide improved sealing at the edge of the dust cover, reducing the ingress of dust and dirt into the vehicle. An external surface of the dust cover may have a greater surface roughness than the external surface of the cover. In this way, the dust cover may be machined with a less strict tolerance than the external surface of the cover member, thereby reducing the cost of the assembly. According to another aspect of the invention, there is provided a radar assembly for a vehicle, the radar assembly comprising: a cover according to the first-mentioned aspect or a panel according to the further aspect; and a radar device having a radar detection volume that intersects the cover at a radar detection area, wherein the internal surface and the external surface encompass the radar detection area. The radar device may be arranged to emit an electromagnetic wave having a frequency of 70GHzto 90GHz. The electromagnetic wave emitted may have a wavelength between 0.3mm and 0.4mm. Within this range, the radar may reliably detect nearby vehicles and other obstacles but may avoid an accidental detection of the cover. According to a still further aspect of the invention, there is provided a vehicle comprising the radar assembly of the another aspect. The radar assembly may be arranged at a front of the vehicle. Within the scope of this application it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and / or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and / or features of any embodiment can be combined in anyway and / or combination, unless such features are incompatible. The applicant reserves the right to change any originally filed claim or file any new claim accordingly, including the right to amend any originally filed claim to depend from and / or incorporate any feature of any other claim although not originally claimed in that manner. BRIEF DESCRIPTION OF THE DRAWINGS One or more embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 shows a vehicle according to an embodiment of the invention; Figure 2 shows a schematic cross-sectional drawing of a radar assembly according to an embodiment of the invention; Figure 3 shows a schematic cross-sectional drawing of a further radar assembly according to an embodiment of the invention; Figure 4 shows a cover for a radar device according to an embodiment of the invention; and Figure 5 shows a further cover for a radar device according to an embodiment of the invention. DETAILED DESCRIPTION A vehicle in accordance with an embodiment of the present invention is described herein with reference to the accompanying Figure 1. The vehicle 100 includes a radar device 350, which is arranged to detect obstacles in front of the vehicle, such as other vehicles and walls or trees. While only a single radar device 350 is shown in Figure 1, it will be understood that the vehicle 100 may comprise a plurality of radar devices 350 and that the radar devices may be arranged to detect objects in any direction relative to the vehicle 100, such as the sides and rear of the vehicle. The radar device 350 may be arranged to emit radio or microwave frequency electromagnetic waves and to receive the reflections of such waves from external objects. Based on the received reflected waves, the radar device 350 may determine the location and / or velocity of external objects. The emitted waves may have a frequency of between 70 and 90GHz, meaning that the waves may have a wavelength of between 3mm and 5mm. The wavelength of the waves emitted by the radar device 350 may determine the level of smoothness required by the cover 200. The radar device 350 is arranged behind a cover 200, with the radar device 350 and cover 200 in combination forming a radar assembly 300. The cover 200 is arranged between the radar device 350 and the surrounding environment, such that the cover 200 is arranged to protect the radar device 350 from the surrounding environment, such as dust and dirt. The cover 200 should be invisible to the radar device 350, such that the cover 200 does not affect the detection of objects by the radar device 350. As explained in greater detail below, the cover 200 may include a heating device in order to reduce or prevent the buildup of snow and ice on an outer surface of the cover 200. A buildup of snow and ice may interfere with detection of external objects by the radar device 350, and this phenomenon may be reduced by the incorporation of a heating device within the cover 200. The cover 200 is arranged within a vehicle panel 400. The vehicle panel 400 may also be referred to as a front grille 400 and the vehicle panel 400 may generally have a greater area than the cover 200, but since the area of the vehicle panel 400 surrounding the cover 200 may not be within a radar detection volume of the radar device 350, the vehicle panel 400 may not have the same design requirements as the cover 200. Figure 2 shows a schematic cross-section of a radar assembly 300. The radar assembly 300 comprises a cover 200 and a radar device 350. The radar device 350 is arranged to detect objects within a radar detection volume V which extends outwardly from the radar device 350. The radar detection volume V extends through the cover 200 and the intersection between the radar detection volume A and the cover 200 may be described by the radar detection area A. While it will be understood that the radar detection volume V may diverge as is passes through the cover 200, meaning that the area at which the radar detection volume V intersects the cover 200 is not the same on an internal surface and an external surface of the cover 200, it will be understood that the divergence of the radar detection volume V as the radar detection volume V passes through the cover 200 is relatively small and that the radar detection area A may therefore be approximated as being constant at the cover 200, such that it is the same on the internal and external surfaces of the cover 200. In the alternative, where there is a high degree of between the intersection of the radar detection volume V and the internal surface and the external surface of the cover 200, the larger of the two areas of intersection may be taken as the radar detection area A. This approximation may ensure that areas of non-uniform thickness that may interfere with the operation of the radar device 350 may be situated outside the radar detection volume V. The cover 200 comprises a cover member 202, which may be a substantially solid piece of material, a heating device 230 arranged to generate heat and a film 220 for coupling the heating device to the cover member. The cover member 202 may be a substantially solid piece of material, such as a plastic material. The heating device 230 may be an electrically conductive wire or may be a different heating device. The film 220 may be an adhesive film arranged to couple the heating device to the cover member 202. The film 220 is optional and the heating device 230 may be coupled to the cover member by fixing means or by an adhesive that does not include a film. In order for the cover 200 not to interfere with the detection capability of the radar device 350, the cover 200 should not have any change in thickness over the radar detection area A that is greater than half of the wavelength of the radar. The wavelength of the radar may be between 3 and 5 mm, meaning that no change in thickness greater than between 1.5 and 2.5 mm should be found on the cover 200 within the radar detection area A. It will be understood that machining a material to such a fine tolerance may require a high degree of manufacturing intensity and that such a smoothness is also a significant design constraint. Consequently, it may be desirable to reduce the area over which such a manufacturing restriction is placed. To this end, the cover 200 may have an external surface 204 that is machined to a low tolerance, such that the external surface substantially smooth. The cover member 202 may also have an internal surface 206. The internal surface 206 may be arranged to support a heating device, which may be coupled to the internal surface 206, such as via adhesive, adhesive film or conventional fixing means, such as screws or bolts. The internal surface 206 may have a greater area than the external surface 204, such that the edges of the heating device may extend beyond the radar detection area A while lying on the internal surface 206. The external surface 204 may have an area that is substantially similar in shape, size and position to the radar detection area A. The external surface 204 may therefore extend a first distance L1 in a first direction D1, the first direction may be a vertical direction and may generally be perpendicular to a direction the radar device 350 faces. The first distance L1 that the external surface 204 may extend in the first direction D1 may be the same distance as the radar detection area A extends in the first direction D1, or may be a greater distance than the radar detection area A extends in the first direction D1. The external surface 204 may extend in a second direction D2 (perpendicular to D1, shown in Figures 4 and 5) the same distance ora greater distance than the radar detection area A. In this way, the external surface 204 of the cover 200 may entirely encompass the radar detection area A such that edges of the external surface 204 have no effect on the detection of external objects by the radar device 350. It is also desirable that the external surface 204 does not have an area significantly greater than the radar detection area A in order to avoid excessive design constraints associated with the low surface roughness requirements described above. The internal surface 206 may extend beyond the detection area A in at least one of the first direction D1 and the second direction D2. In particular, the internal surface 206 may extend in the first direction D1 beyond the radar detection area A and may extend the same distance as the radar detection area A in the second direction D2. As shown in Figure 2, the internal surface 206 may extend at least a second distance L2 in the first direction D1. By extending beyond the detection area A in at least one direction, the internal surface 206 may allow edge details of a heating device, such as turns and / or fastening means, such as screws or bolts to be coupled to the internal surface 206 outside the radar detection area A. This may allow the cover 200 to have a constant overall thickness within the radar detection area A. The second distance L2 may be greater than the first distance L1, such that all of the film 220, heater 230 and internal surface 206 extend in the first direction D1 a distance greaterthan the second distance L2. The second distance L2 may be determined by the first distance L1 plus a tolerance factor. The internal surface 206 may extend a greater distance in the first direction D1 than the film 220 extends in the first direction D1, and the film 220 may extend in the first direction D1 a greater distance than the heating wire 230 extends in the first direction D1. The difference in extension distances of the internal surface 206, film 220 and heating wire 230 may be determined by a tolerance stack up, meaning that the parts can be assembled together in a cascading fashion as shown in Figure 2. As has been explained with reference to the radar detection area A, the internal surface 206 may therefore have a substantially flat area that is greater than a substantially flat area of the external surface 204. Considered alternatively, the internal surface 206 may have a detection region that is substantially corresponding to and overlapping with the external surface 204 in a normal direction N, normal to the external surface 204, and a border region that extends beyond the area of the external surface 204, the border region being arranged to accommodate edge details of a heating device such that the cover member 202 has a nonconstant thickness at the border region. The border region of the internal surface 206 may therefore be outside the radar detection area A. The border region may be an area adjacent to the detection region, or may be two areas arranged on opposite sides of the detection region, or may surround the detection region. The cover member 202 may have a stepped region 208 on an outer side of the cover member 202, which may also be referred to as a stepped surface 208. The stepped surface 208 may be adjacent to the external surface 204 and may cover an area of the cover member 202 having a lesser thickness and the area of the cover member 202 that is covered by the external surface 204. The stepped surface 208 may be arranged to engage with an adjacent component, such as a dust cover. The stepped surface 208 may be arranged to engage with the adjacent component to provide improved sealing between the cover member 202 and the adjacent component, and / or improved stability and fixation of the coupling between the cover member 202 and the adjacent component. The stepped surface 208 may be machined with a lower smoothness requirement than the external surface 204, such that the stepped surface 208 may be produced with a lower manufacturing cost, resulting in a cheaper cover member 202 being produced. The cover 200 also comprises a heating device 230. The heating device 230 may be formed of a heating wire 230 and the heating wire 230 may be attached to the cover member 202 via a film 220. Both of the heating wire 230 and the film 220 may extend beyond the radar detection area A and beyond the area of the internal surface 206 corresponding to the external surface 204 (referred to as a detection region above). The heating wire 230 and film 220 may extend beyond the radar detection area A by a sufficient distance to accommodate tolerances during assembly, such as misplacement of the film 220 and heating wire 230, as well as edge details of the heating wire 230, such as turns in the heating wire 230. The heating wire 230 may be arranged to receive an electrical voltage across it, such that a current is induced in the heating wire 230, resulting in ohmic heating of the heating wire 230, the heating resulting in heating of the cover member 202, which may melt snow or ice on the external surface 204 such that detection of external objects by the radar device is not affected by any buildup of snow or ice. The film 220 may be a thin sheet of material coated with adhesive on both sides. The film 220 and heating wire 230 may be formed together as a single piece for subsequent attachment to the cover member 202. This may allow easier assembly of the cover 200. The film 220 is an optional part of the cover 200 and may be omitted where the heating wire is directly coupled to the cover member 202, such as via adhesive or screws. Figure 3 shows a further radar assembly 360, including the cover 200 and the radar device 350, as well as a dust cover 402 that is arranged with the cover 200 to form a vehicle panel 400, which may also be referred to as a front grille 400. The radar device 350 and cover 200 may be substantially similar to those described above with reference to Figure 2. The dust cover 402 may be formed as a vehicle panel portion having a central hole or aperture for receiving the cover 200. The dust cover 402 may be designed with a greater degree of freedom than the cover 200 as there is no requirement for a high smoothness or constant thickness for the dust cover 402, since the dust cover 402 is outside the radar detection volume V. The dust cover 402 may even comprise openable slits, which may be opened to allow air into the vehicle, such as for cooling, and may be closed when cooling is not required, to reduce the ingress of dust and dirt into the vehicle. The dust cover 402 may also include an engagement portion 404, which may be arranged to engage with the stepped surface 208 in order to provide improved sealing between the cover 200 and the dust cover 402. The engagement portion 404 may further comprise a seal arranged to engage with the stepped surface 208, and / or the stepped surface 208 may comprise a seal, in order to further improve sealing between the dust cover 402 and the cover 200. Figure 4 shows a view of an internal surface of the cover 200 looking outwardly from the vehicle. It can be seen that the radar detection area A extends over a subset of the internal surface 206, and over a subset of the external surface 204. The external surface 204 extends over a subset of the internal surface 206. It can also be seen that the internal surface 206 and external surface 204 extend substantially the same distance in the second direction D2, while the internal surface 206 extends a greater distance than the external surface 204 in the first direction D1. While the internal surface 206, external surface 204 and radar detection area A are substantially rectangular as shown in Figure 4, it will be understood that the surfaces and detection area may have any shape, such as being circular, ovoid or square. The heating wire 230 has linear portions 232, which extend along the internal surface 206 of the cover member 202. The heating wire 230 also includes turns 234, which connect adjacent linear portions 232. The turns 234 are arranged outside the radar detection area A and may be arranged outside the portion of the internal surface 206 corresponding to the external surface 204, this portion being referred to as a border region above. In this way, the turns 234, which may represent a non--uniform thickness of the cover 200, do not interfere with detection of the radar device. The film 220 may have a greater area than the heating wire 230, such that the film 220 may cover a substantial portion of the internal surface 206. In particular, the film 220 may cover a portion of the internal surface 206 including the radar detection area A and extending beyond the radar detection area A. The film 220 may therefore also cover the portion of the internal surface 206 corresponding to the external surface 204 and extend beyond the portion of the internal surface 206 corresponding to the external surface 204. The film 220 may therefore extend in the second direction D2 at least the same distance as the external surface 204 and may extend a greater distance than the external surface in the first direction D1. The film 220 may also extend a greater distance than the heating wire 230 in the first direction D1 and at least the same distance as the heating wire 230 in the second direction D2. Figure 5 shows a further cover 500, which may be used in place of the cover 200 described above with reference to Figures 1 to 4. The cover 500 is arranged to be used with a radar device having a smaller radar detection area A than the cover 200, and it can be seen that the cover member 502, and the internal and external surfaces 506, 504 thereof, may extend a second distance D2 substantially beyond the radar detection area A. The external surface 504 may extend in the first direction D1 substantially the same distance as the radar detection area A, and the internal surface 506 may extend in the first direction D1 a greater distance than the detection area A. Optionally, the external surface 504 may extend in the second direction D2 a shorter distance than the internal surface 506 extends. This may further reduce the machining requirements and design constraint on the cover. A different heating wire 530 may also be used as the heating wire 530 may have turns 534 that include substantially right-angled portions, and the heating wire 530 may have a different thickness at the turns 534 than in the linear portions 532. In particular, the thickness of the heating wire 530 may be greater at the turns 534 than in the linear portions 532. In this way, the heating of the wire may be increased in the linear portions 532 relative to at the turns 534, as the linear portions 532 may have a greater resistance per unit length than the turns 534. This may provide a more efficient heating wire 530. It will also be understood that a heating wire that does not have distinct linear portions and turns may be used and that a heating wire with that is spiral-shaped or has a substantially continuous curve may be used. Further, the heating wire 530 may include a heating wire connector 536, which may be arranged to be coupled to an electrical power source. The heating wire connector 536 may be attached to the internal surface 506 of the cover member 502 outside the radar detection area A. The heating wire connector 536 may be coupled to the internal surface 506 of the radar cover 500 directly or may be arranged on the film 520, and the film 520 may couple the heating wire connector 536 to the internal surface 506. The area of the film 520 may be selected to be slightly greater than the area covered by the linear portions 532 and the turns 534 of the heating wire 530. this way, the film 520 may reliably and evenly couple the heating wire 530 to the cover 500. The film 520 and the heating wire 530 may cover the radar detection area A and may extend beyond the radar detection area A in the first direction D1 and, optionally in the second direction D2. In some cases, the film 520 and heating wire 530 may extend substantially the same distance in the second direction D2 as the radar detection area A extends. As can be seen from figure 5, the heating wire 530, and the film 520, need not necessarily cover the entire internal surface 506 of the cover 500, but may extend a greater distance over the internal surface 506 than the external surface 504 extends, at least in the first direction D1. It will be understood that the cover 500 of Figure 5 may be employed with any of the embodiments described above, and that individual elements of the cover 500, such as the heating wire 530, and the film 520 may also be employed with respect to the cover 200 described with reference to Figures 1 to 4. It will be appreciated that various changes and modifications can be made to the present invention without departing from the scope of the present application.

Claims

1. A cover for a radar device for a vehicle, the cover comprising:a cover member comprising:an external surface arranged to face outwardly from the radar device, the external surface being substantially flat and extending a first distance in a first direction, andan internal surface arranged to face the radar device such that the internal surface overlaps the entire external surface in a direction normal to the external surface, anda heating device coupled to the internal surface of the cover member and arranged to heat the external surface, the heating device overlapping the entire external surface in a direction normal to the external surfacewherein the internal surface and the heating device each extend at least a second distance in the first direction, the second distance being greater than the first distance.

2. The cover of claim 1, wherein the heating device comprises an electrically conductive wire arranged to provide ohmic heating, and wherein the electrically conductive wire comprises linear portions extending in the first direction.

3. The cover of claim 2, wherein the linear portions are arranged over a portion of the internal surface that corresponds to the external surface.

4. The cover of claim 2 or 3, wherein the electrically conductive wire comprises turns, the turns being arranged to couple adjacent linear sections of the electrically conductive wire, the turns being arranged outside a portion of the internal surface that overlaps the external surface.

5. The cover of any one of any preceding claim, further comprising an adhesive film arranged to couple the heating device to the internal surface.

6. The cover of claim 5, wherein the adhesive film extends at least the second distance in the first direction.

7. The cover of any preceding claim, wherein the cover member extends a shorter distance in the first direction than in a second direction perpendicular to the first direction.

8. The cover of any preceding claim, wherein the cover member further comprises a stepped surface, the stepped surface being arranged adjacent to the external surface, andwherein the cover member is thinner in the region corresponding to the stepped surface than in a region corresponding to the external surface.

9. A vehicle panel, the vehicle panel comprising:a cover according to any preceding claim; anda dust cover surrounding the cover.

10. The vehicle panel of claim 9, wherein the cover comprises a stepped surface and wherein the dust cover overlaps and engages the stepped surface.

11. The vehicle panel of claim 9 or 10, wherein an external surface of the dust cover has a greater surface roughness than the external surface of the cover.

12. A radar assembly for a vehicle, the radar assembly comprising:a cover according to any one of claims 1 to 8 or a vehicle panel according to claim 9,10 or 11; anda radar device having a radar detection volume that intersects the cover at a radar detection area,wherein the internal surface and the external surface encompass the radar detection area.

13. The radar assembly of claim 12, wherein the radar device is arranged to emit an electromagnetic wave having a frequency of 70 GHz to 90 GHz.

14. A vehicle comprising the radar assembly of claim 12 or 13.

15. The vehicle of claim 14, wherein the radar assembly is arranged at a front of the vehicle.s

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