Radar antenna and method for manufacturing a radar antenna

Abstract

The invention relates to a radar antenna and a method for manufacturing a radar antenna, and a vehicle (200).

Description

Technical Field

[0001] This invention relates to radar antennas, methods, radar modules, and vehicles. Background Technology

[0002] Radar antennas for transmitting and / or receiving radar waves are known. Such radar antennas can be used, for example, in vehicles to determine, for example, the distance to a vehicle traveling ahead.

[0003] Existing technologies have drawbacks in this regard. As a result, the structure and / or manufacture of radar antennas can be highly complex, costly, slow (manufacturing) speed, large structural space size, and / or limited flexibility or matching capabilities. Summary of the Invention

[0004] Therefore, the object of the present invention is to overcome at least one of the aforementioned disadvantages. In particular, the object of the present invention is to improve complexity, cost, (manufacturing) speed, structural space size, flexibility, and / or compatibility.

[0005] The aforementioned objective is achieved by a radar antenna according to the first aspect of the invention, a method according to the second aspect of the invention, and a vehicle or preferably a radar module used in a vehicle according to the third aspect of the invention.

[0006] Further features and details of the invention arise from the dependent claims, the description, and the drawings. Herein, the features and details described in connection with the radar antenna according to the invention naturally also apply to the method according to the invention and / or the vehicle according to the invention, and vice versa, so that disclosures regarding various aspects of the invention are always cited in or may be cited in connection with each other. In particular, the advantages described within the scope of the first, second, and / or third aspects also apply to the first, second, and / or third aspects respectively.

[0007] According to a first aspect, the present invention relates to a radar antenna, particularly for vehicles, comprising: - A first layer, a second layer, and a third layer, which extend at least partially along a first direction and a second direction. -The second layer is disposed at (uniform and / or equidistant) intervals from the first layer along a third direction. -The third layer is disposed at (uniform and / or equidistant) intervals from the second layer along a third direction. -The first layer has at least one first gap, which is particularly permeable to radar waves (in, along and / or opposite to a third direction). -The second layer has at least one second gap, which is particularly permeable to radar waves, wherein the second gap is configured such that radar waves are (substantially) propagable within (and / or along) the second gap, particularly along the first and / or second directions, and -The third layer has at least one third gap (particularly an outlet) that is particularly permeable to radar waves (in, along and / or opposite to the third direction).

[0008] The radar antenna can be manufactured using a method according to the second aspect of the invention. The radar antenna is preferably configured to transmit and / or receive radar waves, for example in the GHz range, particularly preferably in the (operating frequency) range of the radar chip. Preferably, the radar antenna can have at least a partially layered structure. Thus, in particular, the radar antenna can be constructed layered along (or opposite to) a third direction, for example, during manufacturing. This can optimize cost and / or flexibility. Preferably, the radar antenna, particularly the first, second, and / or third layers, can (each) have a circuit board, such as FR4.

[0009] Within the scope of this invention, a right-hand system may be provided (particularly for clarification). This may include a third direction, a transmitting and / or receiving direction, a z-direction, and / or a forward-pointing direction (along the vehicle's direction of travel), or be designed in such a direction. Here, the first direction and / or the x-direction may be designed to be perpendicular to the third direction (along the direction of travel) from left to right (or vice versa) and / or perpendicular to the second direction. Here, the second direction and / or the y-direction and / or a downward-upward (or vice versa) direction and / or a direction perpendicular to the first direction and / or perpendicular to the second direction may be designed. The first, second, and third directions may form a right-hand system.

[0010] The first, second, and / or third layers may (at least partially) have a circuit board and / or be configured (mutually) in parallel. The first, second, and / or third layers may be at least partially designed to be conductive, wherein, in particular, one or two surfaces (pointing along and / or opposite to a third direction) may be at least partially conductive. The first, second, and / or third layers may be (at least partially) non-unilateral and / or double-sided coatings, for example, through conductive surfaces, particularly metallic surfaces, such as copper cladding. The first, second, and / or third layers may extend at least partially (or completely) along a first and / or second direction. The first, second, and / or third layers may have first, second, and / or third thicknesses along a third direction. The first, second, and / or third layers may have a thickness (along a third direction) between 0 and 50 mm, particularly between 0.5 and 10 mm, preferably 1 mm. The first, second, and / or third layers may be machined and / or manufactured, for example, by means of a milling drill plotter or similar tools.

[0011] The first, second and / or third layers (and / or their outer edges and / or shapes) can preferably be (at least partially) designed in a planar, plate-like and / or square manner, wherein, preferably, the corresponding extensions can be (substantially) perpendicular to the third direction or formed along the first and / or second direction.

[0012] The first, second, and / or third layers—which extend at least partially along the first and second directions—may be spaced apart from each other (along the third direction) and / or not in contact (uniformly and / or equidistantly, especially except for gaps).

[0013] Here, the second layer can be configured to be spaced apart from the first layer (by the thickness of the first connecting layer) along a third direction, for example, by a spacing of 1 mm. Here, the third layer can be configured to be spaced apart from the second layer (by the thickness of the second connecting layer) along a third direction, for example, by a spacing of 1 mm. In manufacturing, this can be achieved, for example, by a (corresponding) spacer, which in particular can be positioned between the first and second layers and / or between the second and third layers.

[0014] The first layer can be configured to have at least one first gap, which is particularly permeable to radar waves, wherein radar waves preferably reach the radar antenna (in the case of transmission) and / or exit the radar antenna (in the case of reception) through the first gap. The first layer can also be configured to be impermeable to radar waves, except for the first gap, particularly along and / or opposite to a third direction. This can thus produce a corresponding directional effect and / or shielding. The first gap (or multiple first gaps) can preferably be at least partially (preferably completely) conductive perpendicular to a third direction and / or along the wall, for example, through a copper cladding layer.

[0015] The second layer can be configured to have at least one second gap, which is permeable, particularly to radar waves. This second gap is thus and / or configured such that radar waves can propagate within (and / or along) the second gap, particularly along a first direction and / or a second direction and / or preferably at least partially perpendicular to a third direction. Here, the second gap can be at least partially configured as a resonator, waveguide, and / or cavity, and / or provided with such a structure (particularly in conjunction with multiple through-contacts).

[0016] It can be configured that the third layer has at least one third gap (in particular an outlet), which is particularly permeable to radar waves, especially (only) along and / or opposite to the third direction.

[0017] Penetrability, or the term "penetrability," can be used within the scope of this invention to refer to radar waves by providing a non-conductive region, and / or a surface or space surrounded (at least partially) by a conductive structure, thereby advantageously guiding and / or allowing radar waves to propagate through / through it. Thus, for example, first, second, and / or third vacancy portions (at least partially) can be surrounded by a conductive material, so that radar waves can propagate through the first, second, and / or third vacancy portions.

[0018] At least one first, second, and / or third (material) void may be formed continuously (along a third direction), particularly through the first, second, and / or third layers, and / or particularly manufactured in the first, second, and / or third layers by drilling and / or milling. Thus, at least one first, second, and / or third void may be formed (each) as a hole, a material void, a square (or having a rectangular basic face perpendicular to the third direction), and / or a cylinder (or having a circular basic face perpendicular to the third direction). The walls of the first, second, and / or third void may be formed (at least partially) along the third direction.

[0019] Within the scope of this invention (see below), it is permissible to provide and / or provide a plurality of first, second, and / or third gaps, through contacts, (first and / or second) (electrically) conductive face segments, and / or radar chips (etc.) (see also below). It is obvious that the embodiments described for one embodiment or for a singular number (e.g., “a first gap”) are equally applicable to corresponding plurality or multiple (e.g., “a plurality of first gaps”) and vice versa.

[0020] Within the scope of the invention, it may be advantageous for the at least one first gap, the at least one second gap, and the at least one third gap to be provided for this purpose (and / or thus, for example, by a corresponding copper cladding layer). - (In the case of transmission) radar waves enter through at least one first gap, particularly along a third direction, at least partially (preferably substantially completely) through and / or propagate along at least one second gap and then exit through at least one third gap, particularly along a third direction (or conversely, particularly in the case of reception), and / or - (In the case of reception) radar waves enter through at least one third gap, particularly along a third direction, pass through and / or propagate along at least one second gap, particularly perpendicular to the third direction, particularly along the first and / or second directions, and then exit through at least one first gap, particularly along the third direction.

[0021] Within the scope of the invention, it is conceivable that the radar chip is disposed on the first layer, particularly (opposite to a third direction) below the first layer, wherein (and / or thus and / or thereby) radar waves can be propagated by the radar chip through at least one first gap, particularly along a third direction, particularly in the case where radar waves are transmitted by the radar chip, and / or conversely, particularly in the case where radar waves are received by the radar chip and / or opposite to a third direction.

[0022] One (or more) radar chips can be configured to transmit and / or receive radar waves. Here, the radar chip may have a (operating frequency) range and / or (including) a resonant frequency. Here, the radar chip may be connected to (or have) a transmit / receive adapter and / or an amplifier. Additional (electrical) components, such as transmit / receive adapters, (high-frequency) amplifiers, and / or the like, may be provided along a third direction and / or downwards and / or opposite to the third direction. A plurality of first gaps and / or particularly (correspondingly) a plurality of radar chips may be provided in the first layer. Here, each of the plurality of first gaps may be provided in a conductive facet segment of the first layer (or through that facet segment along a third direction), particularly at the first, inner, and / or (with respect to the extension of the first layer and / or the second gap) middle end. At least one third gap (or a plurality of third gaps) may be provided, particularly aligned along a third direction, at the second end opposite the first end.

[0023] Within the scope of this invention, the second layer may be configured to have at least one second gap, which extends (at least partially) in a channel-like manner along a first direction and / or a second direction and / or perpendicular to a third direction. Preferably, a plurality of second gaps are provided, wherein each second gap is configured to extend (at least partially) in a channel-like manner along a first direction and / or a second direction and / or perpendicular to a third direction.

[0024] Here, the at least one second void may have an elongated shape and / or be formed along the entire thickness of the second layer (or over the entire thickness of the second layer). The at least one or more second voids may have a thickness along a third direction, particularly...

[0025] - Less than the width along the first and / or second direction and / or

[0026] - Less than the length along the second and / or first direction.

[0027] At least one or more second gaps may have a width along a first and / or second direction, the width being particularly

[0028] - Thickness greater than that along the third direction and / or

[0029] - Less than the length along the second and / or first direction.

[0030] The at least one or more second gaps may have a length along a second and / or first direction, the length being particularly...

[0031] - Thickness greater than that along the third direction and / or

[0032] - Width greater than the width along the first and / or second direction.

[0033] This and / or thereby can provide a long, channel-like and / or longitudinally extended shape for a second gap.

[0034] This and / or thereby can generate, in particular, a longitudinally extending (three-dimensional) space, which is at least partially (electrically and / or spatially) confined by the edges of the at least one second gap (or its edges and / or multiple through contacts), the second surface of the first layer, the first surface of the third layer, and / or the first and / or second connecting layers (in this region). Advantageously, radar waves can propagate within this space. This can create and / or provide cavities, resonators, waveguides, and / or antenna channels. It can be configured to fill all (first, second, and / or third) gaps and / or (channel-like) spaces with air.

[0035] Multiple first / second / third gaps can be configured to be non-intersecting, electrically insulated from each other, and / or spaced apart from each other (perpendicular to the third direction). Thus, the radar antenna can have multiple separate and / or independent waveguides and / or channel-type cavities, resonators, waveguides, and / or antenna channels.

[0036] Furthermore, it is conceivable that the second layer has a plurality of conductive, particularly metallic and / or (hollow) cylindrical through contacts (e.g., in the form of vias) oriented (substantially and / or at least partially) along a third direction and particularly along a first and / or second direction, particularly surrounding the at least one second gap, wherein preferably each of the plurality of second gaps is surrounded, particularly by, a plurality of (identical design) through contacts.

[0037] Here, the through-contact portions can each be configured as cylindrical, particularly as hollow cylinders. The through-contact portions can each surround and / or limit the second gap, cavity, and / or channel-type waveguide, and particularly form impenetrable walls and / or layers (perpendicular to a third direction) for radar waves.

[0038] The through contact portion can preferably be introduced into the second layer during manufacturing, preferably before or after manufacturing the second gap (e.g., by drilling and / or milling). Subsequently, the second layer can be provided and / or fastened, in particular, at intervals, to the first layer (e.g., via the first connecting layer) and / or the third layer (e.g., via the second connecting layer).

[0039] Alternatively, multiple through contacts, particularly along the (closed) edge of at least one second gap, preferably along the corresponding edges of the multiple second gaps, are spaced apart from each other, particularly equidistantly (with respect to directly adjacent through contacts), and / or each has the same (Euclidean and / or perpendicular) spacing with the (corresponding) edge of the (second) gap and / or particularly has a spacing between each other designed to be smaller than the wavelength of the radar wave.

[0040] This simplifies manufacturing and / or prevents radar waves from passing through the through-contact portion perpendicular to a third direction. It can be configured such that radar waves, particularly except for the second gap, cannot propagate and / or diffuse perpendicular to a third direction (in the radar antenna) within the through-contact portion and / or the waveguide (formed therefrom). This provides directional force and / or beamforming for radar waves and / or the radar antenna.

[0041] Multiple through-contact portions may be formed in one or two rows along and / or parallel to the corresponding edge of at least one second gap.

[0042] Within the scope of this invention, it is alternatively possible that each of the plurality of through contacts has and / or forms an (electrical) oscillating circuit, which in particular has a resonant frequency, which is in particular equal to the resonant frequency of the radar chip, and / or

[0043] Each of the multiple through contacts is electrically connected to the following portion: -In the second layer, in particular, the first conductive face segment on the first surface pointing in the opposite direction to the third party and / or -The second conductive face segment on the second surface of the second layer, particularly along the third direction. Each through-contact portion, together with (corresponding) first conductive face segment and / or (corresponding) second conductive face segment, forms a series resonant circuit, which in particular has a resonant frequency, which is specifically equal to the resonant frequency of the radar chip. It can be configured such that each of the plurality of through-contact portions is connected to (exactly) one first conductive face segment and one second conductive face segment. Therefore, a plurality of first and / or second conductive face segments can be provided. This can be configured, for example (perpendicular to a third direction), as a circle or rectangle, particularly a square.

[0044] Preferably, each of the plurality of through-contact portions can be electrically connected to the following portion: -In the second layer, in particular, the first conductive face segment on the first surface pointing in the opposite direction to the third party and / or -The second conductive face segment on the second surface of the second layer, particularly along the third direction. Each of the plurality of through contacts, particularly the length along a third direction and / or the diameter of the hole (through contact), is designed such that leakage and / or emission of radar waves from the at least one second gap (perpendicular to the third direction) is minimized, especially in the range of operating frequencies of the radar chip, in conjunction with the capacitance between the first conductive face segment and the second conductive face segment, and particularly between the first layer and / or the third layer.

[0045] The one (or more) first conductive face segments can be planar, plate-like, and / or conductively formed and preferably disposed and / or manufactured in / on the (first) surface (or metal cladding) of the second layer, for example, by means of drilling and / or milling. This can produce individual first conductive face segments, which can, for example, be designed in a checkerboard pattern and / or designed as gaskets.

[0046] One or more second conductive face segments may be formed, preferably disposed and / or manufactured in / on the second (second) surface (or metal cladding) of the second layer (perpendicular to the third direction) in a planar, rectangular, square, plate-like and / or conductive manner, for example by means of drilling and / or milling. This can produce individual second conductive face segments, which may, for example, be designed in a checkerboard pattern and / or designed as gaskets.

[0047] In particular, by combining the through-contact portion, the first and / or second conductive face segments can (each) form conductive structures and / or resonators and / or oscillation circuits, which in particular (through their plurality) form and / or surround (channel-like) spaces and / or second gaps. This allows for the adjustment and / or optimization of the geometry and / or antenna profile in a simple manner (e.g., within the scope of previously implemented simulations).

[0048] Furthermore, within the scope of the invention, the third layer may be configured to have at least one third gap, preferably multiple third gaps, each of which has at least (each) a first wall and / or particularly a second wall opposite to the first wall, having at least partially (continuously) an angle with the third direction between 0° and 180°, preferably between 0° and 90°, and / or particularly an acute angle, preferably between 5° and 85°, for example between 10° and 45°, preferably between 15° and 30°, thereby particularly forming a horn antenna-like shape.

[0049] In the case of a multi-layered design, it is preferable that each layer can be processed and / or removed individually, which simplifies manufacturing, for example, to create the first and / or second walls and / or to produce a stepped structure. The first and / or second walls may here partially have a first segment pointing along a third direction and a second segment adjacent to the first segment (along the third direction), which forms an angle with the third direction. Here, the first and second walls, or the second segment of the first wall and the second segment of the second wall, may form an angle with the third direction in opposite directions (thus the third gap is thus configured to open further, becoming funnel-shaped and / or conical). It is also conceivable that the first and / or second walls are at least partially configured as stepped and / or stepped. The first and / or second walls may preferably be configured symmetrically with respect to the third direction. The first and / or second walls may be configured identically in each of a plurality of third gaps. In the simplest case, each third gap may be configured (perpendicular to the third direction) as circular and / or cylindrical (e.g., as a drill hole). Rectangular, especially square, shapes are also conceivable. The first and / or second walls may be at least partially (preferably completely) configured to be conductive, for example, through a copper cladding layer.

[0050] Preferably, the third layer can be configured to have a plurality of third gaps, which are preferably spaced apart from each other (equally spaced), particularly along the first and / or second directions and / or perpendicular to the third direction.

[0051] It is conceivable that a first connecting layer is provided between the first layer and the second layer, the first connecting layer (in particular) irreversibly and / or non-destructively fastening the first layer and the second layer together, preferably simultaneously achieving a predetermined interval between the first layer and the second layer, wherein, in particular, the first connecting layer (at least partially) has at least one first connecting element for fastening the first layer to the second layer, wherein the first connecting layer and / or at least one first connecting element preferably has at least one adhesive connection (e.g., epoxy resin), and / or has multiple adhesive points, and / or is configured as an adhesive layer (e.g., in the form of double-sided adhesive tape), and / or has a welded connection, particularly a welded layer, and / or has a sintered connection, particularly configured as a sintered layer, and / or

[0052] A second connecting layer is provided between the second and third layers. The second connecting layer (in particular) irreversibly and / or non-destructively fastens the second and third layers to each other and preferably simultaneously achieves a predetermined interval between the second and third layers. In particular, the second connecting layer (at least partially) has at least one second connecting element for fastening the second layer to the third layer. The second connecting layer and / or at least one second connecting element preferably have at least one adhesive connection (e.g., epoxy resin), and / or have multiple adhesive points, and / or are configured as an adhesive layer (e.g., in the form of double-sided adhesive tape), and / or have welded connections, particularly welded layers, and / or have sintered connections, particularly configured as sintered layers.

[0053] At least one first and / or second connecting element may be partially formed here along the first and / or second direction. This saves material (especially compared to continuous layers). Multiple (e.g., equidistant from each other) first and / or second connecting elements may be provided. These connecting elements are preferably provided on and / or beside the first, second, and / or third layers, particularly between them, after at least one first and / or second spacer element has been provided. The first, second, and / or third layers can then be added, for example, along and / or opposite to a third direction. This allows for mutual fastening.

[0054] Preferably, the first and / or second connecting layers (or the layers connected by the first and / or second connecting layers) are not non-destructively detachable. This can improve robustness and / or shape stability. Preferably, the first and / or second connecting layers are designed to be non-conductive and / or have a non-conductive material. Preferably, the first and / or second connecting layers (at least partially) are configured to be flush with each other and / or aligned along a third direction. The first and / or second connecting layers may each have a void, which is configured to be flush with and / or aligned with a second void or multiple second voids along a third direction. The first connecting layer may preferably have a void (or multiple voids), which is configured to be aligned with and / or flush with a conductive face segment of the first layer (pointing along a third direction) perpendicular to the third direction. The second connecting layer may preferably have a void (or multiple voids), which is configured to be aligned with and / or flush with a conductive face segment of the third layer (pointing opposite to the third direction) perpendicular to the third direction. These embodiments may also each be applicable to at least one first and / or second connecting element.

[0055] The first / second connecting layer may have a gap, specifically aligned along a third direction (with the first / third gap), in its own region within at least one first / third gap (or each of the plurality of first / third gaps), which is preferably...

[0056] - Formed and / or flush with at least one first / third gap, particularly with respect to the first and / or second direction

[0057] - (Perpendicular to a third direction) confined by a conductive layer, which in particular can facilitate the guidance and / or propagation of radar waves.

[0058] Furthermore, it is conceivable that the first connecting layer and / or the second connecting layer are configured to be flush with at least one second gap along the first direction and / or along the second direction, particularly flush with each of the plurality of second gaps, thereby producing a channel-like and / or waveguide-like shape.

[0059] The first and / or second connecting layers, particularly the at least one first and / or second connecting element, can be made of resin, particularly epoxy resin, fiberglass, varnish, and / or solder resist. This provides different possibilities for manufacturing, increasing flexibility. Advantageously, the first and / or second connecting layers, particularly the at least one first and / or second connecting element, can be applied initially in a liquid and / or viscous form (on the first, second, and / or third layers). The respective layers can then be placed on top of each other, for example, the second layer on the first layer or the third layer on the second layer. A radiation source can then be used for curing.

[0060] Advantageously, the first and / or second connecting layers, particularly the at least one first and / or second connecting element, can compensate for possible unevenness and / or manufacturing tolerances of the first, second, and / or third layers, thereby preferably (even so) these layers can be arranged and / or fastened to each other in parallel. This can reduce costs and / or improve efficiency.

[0061] It can be configured such that the first connecting layer, particularly the at least one first connecting element, is at least partially formed in the (mutually facing) recesses of the first and / or second layers. It can also be configured such that the second connecting layer, particularly the at least one second connecting element, is at least partially formed in the (mutually facing) recesses of the second and / or third layers. This can advantageously improve manufacturing accuracy, especially because the (uncured) material of the connecting layers, particularly the at least one first and / or second connecting element, can diffuse within the recesses (without altering the spacing between the layers). This can also prevent undesirable distribution and / or flow during manufacturing. Here, for example, a liquid material such as resin can fill the recesses during manufacturing. Therefore, higher robustness and / or (better) parallel orientation can be achieved.

[0062] Additional or alternative first connecting mechanisms (between the first and second layers) and / or second connecting mechanisms (between the second and third layers) may be provided—for example, having force-locking and / or form-locking connecting mechanisms—such as bolts and / or adhesives, preferably disposed in recesses in the first, second, and / or third layers. The first connecting mechanism preferably (accurately) determines the spacing between adjacent layers. The first connecting mechanism may also (simply) be configured as a pin-like portion.

[0063] Within the scope of this invention, at least one first (e.g., square) spacer element may be provided between the first layer and the second layer, particularly in the first connecting layer, to represent a predetermined interval between the first layer and the second layer, and / or

[0064] At least one (e.g., square) second spacer element is provided between the second and third layers, particularly in the second connecting layer, the spacer element realizing a predetermined interval between the second and third layers.

[0065] Multiple (e.g., equidistant from each other) first and / or second spacer elements may be provided here. These spacer elements may preferably be provided between the respective layers before they are set together and / or fastened to each other (e.g., by means of first and / or second connecting elements).

[0066] Within the scope of the invention, it may be advantageous for the first layer, the second layer and / or the third layer and / or particularly the first connecting layer and / or the second connecting layer, particularly partially parallel to each other, and particularly for their outwardly pointing edges to be aligned along the first direction and / or the second direction.

[0067] The edges can be aligned with each other along a third direction. This allows for simpler manufacturing, such as within a square and / or single-sided open housing. It also allows for a compact structural space for the radar antenna.

[0068] Within the scope of the invention, it is conceivable that the first layer has at least one conductive face segment, which (other than the first gap) is configured to be aligned along a third direction with at least one second gap (and / or its edge and / or through contact and / or the first and / or the second conductive face segment) of the second layer and / or particularly aligned with the first connecting layer (or the vacancy formed therein), wherein, preferably, the first layer has a plurality of conductive face segments, each of which is configured along a third direction to be aligned along a third direction with (exactly) one of the plurality of second gaps in the second layer with (and / or its edge and / or through contact and / or the first and / or the second conductive face segment) and / or particularly aligned with the first connecting layer (or the vacancy formed therein).

[0069] At least one conductive face segment (or multiple conductive face segments) perpendicular to a third direction may have a shape identical to that of the at least one second gap and / or the first connecting layer (or the gap formed therein) of the second layer. Here, at least one (each) first gap may be disposed in at least one conductive face segment (in the middle and / or at the center and / or along the first and / or second directions). Conductive face segments, particularly multiple conductive face segments, may be disposed on a first surface of the first layer, particularly along (or opposite to) a third direction. Alternatively or additionally, conductive face segments, particularly multiple conductive face segments, may be disposed on a second surface of the first layer, particularly along a third direction. Alternatively or additionally, conductive face segments, particularly multiple conductive face segments, may be formed over the entire thickness of the first layer. Here, the first layer may be configured, for example, entirely conductive, for example, configured as a copper plate. The first layer may (at least partially) have (first) wall segments oriented along a third direction, said wall segments preferably configured to be conductive. The wall segments may here (fully surround) the first gap. The wall segments can be (particularly circumferentially) connected to the conductive face segments of the first layer. Similarly, multiple (first) wall segments can be provided, each configured to and / or (circumferentially) surround one of a plurality of first voids. The at least one conductive face segment (or multiple conductive face segments) can be surrounded by (spaced therewith) other conductive face segments, which preferably serve as a protective plate and / or prevent further diffusion in the first layer (outward and / or perpendicular to a third direction).

[0070] Within the scope of the invention, it is conceivable that the third layer has at least one conductive face segment which (other than one or more third gaps) is configured to be aligned (in a third direction) with at least one second gap (and / or its edge and / or through contact and / or the first and / or second conductive face segment) of the second layer and / or particularly with the second connecting layer (or the gap formed therein), wherein, preferably, the third layer has a plurality of conductive face segments which are each configured to be aligned (in a third direction) with (exactly) one of the plurality of second gaps in the second layer (and / or its edge and / or through contact and / or the first and / or second conductive face segment) and / or particularly with the second connecting layer (or the gap formed therein).

[0071] At least one conductive face segment of the third layer may have a shape perpendicular to a third direction, identical to that of at least one second void and / or second connecting layer (or void formed therein) of the second layer. Here, the at least one (each) third void may be disposed in at least one conductive face segment (particularly about the longitudinal axis of the second void, in the middle and / or at the center and / or along the first and / or second directions). Conductive face segments, particularly multiple conductive face segments, may be disposed on a first surface of the third layer, particularly opposite to (or along) a third direction. Alternatively or additionally, conductive face segments, particularly multiple conductive face segments, may be disposed on a second surface of the third layer, particularly along (or opposite to) a third direction. Alternatively or additionally, conductive face segments, particularly multiple conductive face segments, may be formed over the entire thickness of the third layer. Here, the third layer may be configured to be entirely conductive, for example, configured as a copper plate. The third layer may have one or more (at least partially) (first) wall segments oriented along a third direction, which are preferably configured to be conductive. One or more wall segments may (each) (fully surround) the third void. One or more wall segments may (particularly fully surround) be connected to the (corresponding) conductive face segments of the third layer. Similarly, multiple (third) wall segments may be provided, wherein each wall segment is respectively configured to surround one of the multiple third voids.

[0072] Within the scope of this invention, at least one first gap and at least one third gap (and / or multiple third gaps) may be provided in a third direction without being aligned with each other, wherein, in particular, multiple first gaps and multiple third gaps are configured in a third direction without being aligned with each other.

[0073] In other words, the first gap and the third gap can be spaced apart from each other about a first direction and / or a second direction. Here, the gap can be (substantially) located at the opposing ends of at least one second gap (especially in a channel-like form) and / or formed opposite each other (about this).

[0074] Furthermore, it is conceivable that the first layer has at least one first positioning gap, the second layer has at least one second positioning gap and / or the third layer has at least one third positioning gap, and in particular the first connecting layer has at least one fourth positioning gap and the second connecting layer has at least one fifth positioning gap, which are preferably aligned along a third direction.

[0075] The first, second, third, fourth, and / or fifth positioning gaps can be oriented and / or designed as holes along a third direction. It can be configured such that at least two first, second, third, fourth, and / or fifth positioning gaps are provided, preferably spaced apart from each other, for example, at opposite corners (diagonally and / or perpendicular to the third direction) in the first, second, and / or third layers. In manufacturing, the corresponding first, second, third, fourth, and / or fifth positioning gaps can be aligned (along the third direction) to particularly ensure and / or improve orientation and / or positioning and / or manufacturing speed. This can be achieved, for example, by (each) a (complementarily designed) positioning aid, such as a (metal) pin, which is introduced particularly along the third direction.

[0076] It is also conceivable that the first layer has at least one first structure, the second layer has at least one second structure and / or the third layer has at least one third structure, and in particular the first connecting layer has at least one fourth structure and the second connecting layer has at least one fifth structure, which is preferably configured such that, particularly after the first connecting layer and / or the second connecting layer are applied and / or hardened and / or preferably the first, second and / or third layers are fastened to each other, the (relative) positioning of the first layer, (with) the second layer and / or (with) the third layer with respect to the first direction and / or the second direction and / or the third direction is checked.

[0077] The first, second, third, fourth, and / or fifth structures can be aligned along a third direction, for example, within the manufacturing range. This can advantageously improve accuracy and / or manufacturing speed. The first, second, third, fourth, and / or fifth structures can be configured as gaps, particularly in the edge regions, along the first and / or second directions. Thus, alignment and / or correct orientation can be controlled, for example, by a straight measuring device (e.g., a ruler). Alternatively, multiple first, second, and / or third gaps can be configured to form corresponding (geometric) structures or be surrounded by corresponding geometric structures. Thus, correct orientation and / or positioning can be identified and / or verified, for example, optically (e.g., by personnel and / or optical detection units, such as cameras).

[0078] According to a second aspect, the present invention also relates to a method for manufacturing a radar antenna according to the first aspect, the method comprising: -supply The first layer having at least one first void, A second layer having at least one second void, and A third layer having at least one third void - A second layer is disposed at a distance from the first layer (e.g., via a housing and / or support and / or a track system for manufacturing) along a third direction, wherein, in particular, the at least one second gap is disposed aligned with at least one conductive face segment of the first layer along a third direction, and - A third layer is provided at a distance from the second layer (e.g., by means of a housing and / or a support and / or a track system for manufacturing) along a third direction, wherein, in particular, the at least one second gap is aligned with at least one conductive face segment of the third layer along a third direction, and wherein, in particular, the at least one first gap is not aligned with the at least one third gap along a third direction.

[0079] Preferably, a second layer is provided at a distance from the first layer along a third direction and / or a third layer is provided at a distance from the second layer along a third direction, such that each edge is formed flush with the first and / or second directions.

[0080] The arrangement can be achieved here by approaching each layer along and / or opposite to a third direction. Thus, the first layer can be moved along a third direction to place it on the second layer. Alternatively or additionally, the second layer can be moved opposite to a third direction to place it on the first layer. Thus, the second layer can be moved along a third direction to place it on the third layer. Alternatively or additionally, the third layer can be moved opposite to a third direction to place it on the second layer.

[0081] A first connecting layer may be applied before and / or during the placement of a second layer spaced apart from the first layer along a third direction, for example on a surface of the first layer pointing in the third direction and / or on a surface of the second layer pointing in the opposite direction. The application of the first connecting layer (at least partially) (planar) may be performed on the first layer (particularly on the second surface pointing in the third direction), particularly in recesses created there (e.g., by drilling and / or milling). Alternatively or additionally, the application of the first connecting layer (at least partially) (planar) may be performed on the second layer (particularly on the first surface pointing in the opposite direction), particularly in recesses created there (e.g., by drilling and / or milling).

[0082] A second connecting layer may be applied before and / or during the placement of a third layer at a distance from the second layer along a third direction, for example on a surface of the second layer pointing in the third direction and / or on a surface of the third layer pointing in the opposite direction. The application of the second connecting layer (at least partially) (planar) may be performed on the second layer (particularly on the second surface pointing in the third direction), particularly in recesses created there (e.g., by drilling and / or milling). Alternatively or additionally, the application of the second connecting layer (at least partially) (planar) may be performed on the third layer (particularly on the first surface pointing in the opposite direction), particularly in recesses created there (e.g., by drilling and / or milling).

[0083] After application, the first and / or second bonding layers can be hardened, for example, by irradiation with a radiation source, such as an ultraviolet light source.

[0084] Therefore, the method according to the second aspect of the invention produces the same advantages as those already described regarding the radar antenna according to the first aspect of the invention.

[0085] According to a third aspect, the present invention also relates to a vehicle that includes a radar antenna according to the first aspect.

[0086] Therefore, the vehicle according to the invention according to the third aspect produces the same advantages as those already described with respect to the radar antenna according to the invention according to the first aspect and / or the method according to the invention according to the second aspect.

[0087] According to the fourth aspect, the invention may further include the application of the radar antenna according to the first aspect in vehicles, particularly according to the third aspect.

[0088] Therefore, the application according to the fourth aspect produces the same advantages as those already described with respect to the radar antenna according to the first aspect and / or the method according to the second aspect and / or the vehicle according to the third aspect. Attached Figure Description

[0089] Further advantages, features, and details of the present invention arise from the following description, in which several embodiments of the invention are described in detail with reference to the accompanying drawings. Here, the features mentioned in the claims and specification may be individually or in any combination essential to the invention.

[0090] Each is illustrated here by illustration and example: Figure 1 The first, second, and third layers are shown. Figure 2a Showing the radar antenna, Figure 2b Showing the radar antenna, Figure 3 Showing the radar antenna, Figure 4 The first layer is shown. Figure 5 The second layer is shown. Figure 6 The third layer is shown. Figure 7 The radar antenna is shown in a top view or as a projection. Figure 8 Show the vehicle, and Figure 9 The method is shown.

[0091] In the accompanying drawings, the same reference numerals are used for the same technical features in different embodiments. Detailed Implementation

[0092] Figure 1 , 2a Figures 2b and / or 3 show a radar antenna 100, specifically for vehicle 200, which has the following features: - A first layer 1, a second layer 2, and a third layer 3, which extend at least partially along a first direction x and a second direction y. -In this context, the second layer 2 is spaced apart from the first layer 1 along the third direction z. -In this context, the third layer 3 is spaced apart from the second layer 2 along the third direction z. - wherein the first layer 1 has at least one first gap 10, the first gap being particularly permeable to radar waves (along and / or opposite to the third direction z). - wherein the second layer 2 has at least one second gap 20, the second gap being particularly permeable to radar waves, wherein the second gap 20 is configured such that radar waves can propagate within the second gap 20, particularly along the first direction x and / or the second direction y, and -The third layer 3 has at least one third gap 30, which is particularly permeable to radar waves (along and / or opposite to the third direction z).

[0093] Within the scope of the invention, it may be advantageous to say that at least one first gap 10 (see Figure 4 The at least one second gap 20 (see) Figure 5 ) and the at least one third gap 30 (see Figure 6 ) is set as, -Radar waves, particularly along a third direction z, enter through at least one first gap 10, propagate at least partially through and / or along at least one second gap 20, and then exit through at least one third gap 30, particularly along a third direction z, and / or - Radar waves enter through at least one third gap 30, particularly along the third direction z, propagate at least partially through and / or along the at least one second gap 20, particularly perpendicular to the third direction z, particularly along the first direction x and / or the second direction y, and then exit through at least one first gap 10, particularly along the third direction z.

[0094] like Figure 2a , 2bAs shown in Figure 3, within the scope of the invention, it is conceivable that the radar chip 5 is disposed on the first layer 1, particularly below the first layer 1 opposite to the third direction z, wherein radar waves can be propagated by the radar chip 5 through the at least one first gap 10, particularly along the third direction z, especially in the case where radar waves are emitted by the radar chip 5, and / or conversely, especially in the case where radar waves are received by the radar chip 5 and / or opposite to the third direction z.

[0095] like Figure 2a As shown, within the scope of the invention, the second layer 2 may be configured to have at least one second gap 20, the second gap extending at least partially in a channel-like manner along the first direction x and / or the second direction y, wherein, preferably, a plurality of second gaps 20, 20.1, 20.2 are provided, wherein each second gap is at least partially in a channel-like manner along the first direction x and / or the second direction y.

[0096] Furthermore, it is also conceivable that the second layer 2 has a plurality of conductive, particularly metallic, through contacts 22 oriented along a third direction z and particularly along a first direction x and a second direction y, particularly surrounding the at least one second gap 20 around its entire circumference, wherein preferably each of the plurality of second gaps 20, 20.1, 20.2 is surrounded by a plurality of through contacts 22, particularly around its entire circumference.

[0097] Alternatively, multiple through contacts 22 may be provided spaced apart from each other, particularly at equal intervals, along the edges of the at least one second gap 20, preferably along the corresponding edges of the multiple second gaps 20, 20.1, 20.2, and / or each have the same spacing with the edges of the second gaps 20, 20.1, 20.2 and / or have a spacing between each other that is designed to be smaller than the wavelength of the radar wave.

[0098] Optionally, within the scope of this invention, each of the plurality of through contacts 22 may form an oscillating circuit having a resonant frequency equal to the resonant frequency of the radar chip 5, or

[0099] Each of the plurality of through contacts 22 is electrically connected to the following portion: -The first conductive face segment 21.1 and / or on the first surface 2.1 of the second layer 2, specifically opposite to the third direction z. -The second conductive face segment 21.2 on the second surface 2.2 of the second layer 2, specifically pointing along the third direction z. Each through contact portion, together with the first conductive face segment and / or the second conductive face segment, forms a series oscillating circuit, the series oscillating circuit having a resonant frequency, the resonant frequency being equal to the resonant frequency of the radar chip 5.

[0100] Preferably, each of the plurality of through contacts 22, 22.1, 22.2 is designed in such a way that the length along the third direction z, the diameter of the hole, and / or the area are determined such that leakage of radar waves from at least one second gap 20 is minimized, particularly in the operating frequency range of the radar chip 5, wherein, in particular, each of the plurality of through contacts 22 is electrically connected to the following portion: -The first conductive face segment 21.1 and / or on the first surface 2.1 of the second layer 2, specifically opposite to the third direction z. -The second conductive face segment 21.2 on the second surface 2.2 of the second layer 2, specifically pointing along the third direction z. Each of the plurality of through contacts 22 is designed, in particular, to be sized with respect to the length along the third direction z, the diameter of the hole and / or the area, such that, in conjunction with the capacitance between the first conductive face section 21.1 and the second conductive face section 21.2, and in particular the conductive sections of the first layer 1 and / or the third layer 3, the leakage of radar waves from at least one second gap 20 is minimized, especially in the operating frequency range of the radar chip 5.

[0101] Furthermore, within the scope of the invention, the third layer 3—which can preferably be configured in multiple layers—may have at least one third gap 30, preferably multiple third gaps 30, 30.1, 30.2, which has at least one first wall and / or particularly a second wall opposite to it, having at least a partial angle between 0° and 90° with the third direction z, particularly an acute angle, preferably an acute angle between 5° and 85°, thereby particularly forming a horn antenna-like shape.

[0102] like Figure 2a , 2b As shown in Figure 3, it is conceivable that a first connecting layer 40 is provided between the first layer 1 and the second layer 2, the first connecting layer irreversibly fastening the first layer 1 and the second layer 2 together, wherein the first connecting layer 40 preferably has at least one adhesive connection portion, and / or

[0103] A second connecting layer 50 is provided between the second layer 2 and the third layer 3. The second connecting layer irreversibly fastens the second layer 2 and the third layer 3 to each other. Preferably, the second connecting layer 50 has at least one adhesive connection portion.

[0104] like Figure 2a As shown, it is conceivable that the first connecting layer 40 and / or the second connecting layer 50 are configured to be flush with at least one second gap 20 along the first direction x and / or along the second direction y, particularly with each of the plurality of second gaps 20, 20.1, 20.2, thereby generating a channel-like and / or waveguide-like shape.

[0105] like Figure 2b As shown, a first connecting layer 40 can be provided between the first layer 1 and the second layer 2. This first connecting layer irreversibly fastens the first layer 1 and the second layer 2 together, and preferably simultaneously achieves a predetermined interval between the first layer 1 and the second layer 2. Specifically, the first connecting layer 40 has at least one first connecting element 41 for fastening the first layer 1 onto the second layer 2, and / or

[0106] A second connecting layer 50 is provided between the second layer 2 and the third layer 3. The second connecting layer irreversibly (fastens) the second layer 2 and the third layer 3 together and preferably simultaneously achieves a predetermined interval between the second layer 2 and the third layer 3. In particular, the second connecting layer 50 has at least one second connecting element 51 for fastening the second layer 2 onto the third layer 3.

[0107] Figure 2b Exemplarily shown, at least one first spacer element 42 is provided between the first layer 1 and the second layer 2, particularly in the first connecting layer 40, the first spacer element realizing a predetermined interval between the first layer 1 and the second layer 2, and / or

[0108] At least one second spacer element 52 is provided between the second layer 2 and the third layer 3, particularly in the second connecting layer 50, the second spacer element realizing a predetermined interval between the second layer 2 and the third layer 3.

[0109] like Figure 3 As shown, it is conceivable that the first connecting layer 40 and the second connecting layer 50 are configured to be flush with each other along the first direction x and / or along the second direction y, and particularly not flush with the at least one second gap 20, particularly not flush with each of the plurality of second gaps 20, 20.1, 20.2. Figure 3 The diagram shows a conductive face segment 11 of the first layer 1 (on a surface pointing in a third direction), which is adjacent to (and connected to) the conductive wall segment of the first gap 10. Figure 3 The third layer 3 (on a surface pointing in the opposite direction to the third layer) is shown here as having a conductive face segment 31 that is adjacent to (and connected to) the conductive wall segment of the third gap 30 or the first and / or second wall.

[0110] like Figure 2a , 2b As shown in Figures 1 and 3, it is advantageous within the scope of the invention that the first layer 1, the second layer 2, and the third layer 3, and particularly the first connecting layer 40 and / or the second connecting layer 50, are arranged in particular partially parallel to each other, and particularly their outwardly pointing edges are aligned along the first direction x and / or the second direction y.

[0111] like Figure 4 As shown, within the scope of the invention, the first layer 1 may be configured to have at least one conductive face segment 11, which is aligned along a third direction z with the at least one second gap 20 of the second layer 2 and / or particularly aligned with the first connecting layer 40. Preferably, the first layer 1 has a plurality of conductive face segments 11, 11.1, 11.2, each of which is aligned along a third direction z with one of the plurality of second gaps 20, 20.1, 20.2 in the second layer 2 and / or particularly aligned with the first connecting layer 40.

[0112] like Figure 6 As exemplarily shown, the third layer 3 may have at least one conductive face segment 31 and / or multiple conductive face segments 31, 31.1, 31.2. This or these face segments may preferably be aligned (each) with at least one of the multiple conductive face segments 11, 11.1, 11.2 in the third direction z.

[0113] like Figure 7 By way of example, within the scope of the present invention, the at least one first gap 10 and at least one third gap 30 may be configured to be non-aligned with each other along a third direction z, wherein, in particular, a plurality of first gaps 10 and a plurality of third gaps 30, 30.1, 30.2 are configured to be non-aligned with each other along a third direction. Figure 7 The projection along the z-direction is shown here (purely illustrative) in particular to illustrate the location of the different features.

[0114] Alternatively, it may be considered that the first layer 1 has at least one first positioning gap, the second layer 2 has at least one second positioning gap, and the third layer 3 has at least one third positioning gap, and in particular the first connecting layer 40 has at least one fourth positioning gap and the second connecting layer 50 has at least one fifth positioning gap, which are preferably arranged aligned along the third direction z.

[0115] Alternatively, the first layer 1 may have at least one first structure, the second layer 2 may have at least one second structure, and the third layer 3 may have at least one third structure, and in particular the first connecting layer 40 may have at least one fourth structure and the second connecting layer 50 may have at least one fifth structure, preferably configured such that the positioning of the first layer 1, the second layer 2, and / or the third layer 3 with respect to the first direction x and / or the second direction y and / or the third direction z may be checked, particularly after the first connecting layer 40 and / or the second connecting layer 50 have been applied and / or hardened.

[0116] Figure 8 Vehicle 200 is shown, including according to the first aspect and / or according to Figure 1 Radar antenna 100, one of 2 or 3.

[0117] Figure 9 It is shown that it is used to manufacture in accordance with the first aspect and / or in accordance with Figure 1 A method for using one of 1, 2, or 3 radar antennas 100, the method having: - Provide 110 The first layer 1 having at least one first gap 10 The second layer 2 having at least one second void 20, and The third layer 3 has at least one third void 30. A second layer 2 is provided 120 spaced apart from the first layer 1 along a third direction z, wherein, in particular, the at least one second gap 20 is aligned along the third direction z with at least one conductive face segment 11 of the first layer 1, and - A third layer 3 is provided at a distance of 130 from the second layer 2 along the third direction z, wherein, in particular, the at least one second gap 20 is aligned with at least one conductive face segment 31 of the third layer 3 along the third direction z, and wherein, in particular, the at least one first gap 10 and the at least one third gap 30 are not aligned along the third direction z.

[0118] List of reference numerals

[0119] 1. First layer

[0120] 2. Second layer

[0121] 2.1 First surface of the second layer

[0122] 2.2 Second surface of the second layer

[0123] 3. Third layer

[0124] 5 radar antennas

[0125] 10 (at least one) first gap

[0126] 11 Facial segments that can conduct electricity

[0127] 11.1, 11.2 (first layer) Multiple conductive face segments

[0128] 20 (at least one) second gap

[0129] 20.1, 20.2 Multiple second gaps

[0130] 21.1 The first conductive face segment on the first surface of the second layer

[0131] 21.2 The second conductive face segment on the second surface of the second layer

[0132] More than 22 through contact parts

[0133] 30 (at least one) third gap

[0134] 30.1, 30.2 Multiple third gaps

[0135] 31, 31.1, 31.2 (the third layer) multiple conductive face segments

[0136] 40 First Connector Layer

[0137] 41 At least one first connecting element

[0138] 42 At least one first spacer element

[0139] 50 Second Connection Layer

[0140] 51 At least one second connecting element

[0141] 52 At least one second spacer element

[0142] 100 radar antenna

[0143] 110 provides the first, second, and third tiers.

[0144] A second layer is set up at an interval between the first and second layers.

[0145] A third layer is set at an interval between the second and third layers.

[0146] 200 vehicles

[0147] x First direction

[0148] y second direction

[0149] z Third-party

Claims

1. A radar antenna (100), particularly a radar antenna for vehicles (200), has the following characteristics: - A first layer (1), a second layer (2), and a third layer (3), wherein the first layer, the second layer, and the third layer extend at least partially along a first direction (x) and a second direction (y). -in, The second layer (2) is disposed at a distance from the first layer (1) along a third direction (z). -The third layer (3) is disposed at an interval from the second layer (2) along a third direction (z). - wherein the first layer (1) has at least one first gap (10), the first gap being particularly permeable to radar waves along a third direction (z). - wherein the second layer (2) has at least one second gap (20), wherein the second gap (20) is configured such that radar waves can propagate within the second gap (20), particularly along the first direction (x) and / or the second direction (y), and -The third layer (3) has at least one third gap (30), which is particularly permeable to radar waves along the third direction (z).

2. The radar antenna (100) according to claim 1, characterized in that, The at least one first gap (10), the at least one second gap (20), and the at least one third gap (30) are configured as follows: - This allows radar waves to enter through the at least one first gap (10), particularly along the third direction (z), to propagate at least partially through and / or along the at least one second gap (20), particularly perpendicular to the third direction (z), and then exit through the at least one third gap (30), particularly along the third direction (z), and / or - This causes radar waves to enter through the at least one third gap (30), particularly along the third direction (z), to propagate at least partially through and / or along the at least one second gap (20), particularly perpendicular to the third direction (z), particularly along the first direction (x) and / or the second direction (y), and then exit through the at least one first gap (10), particularly along the third direction (z).

3. The radar antenna (100) according to claim 1 or 2, characterized in that, The radar chip (5) is disposed on the first layer (1), particularly below the first layer (1) opposite to the third direction (z), wherein radar waves can be propagated by the radar chip (5) through the at least one first gap (10), particularly along the third direction (z), especially in the case where radar waves are transmitted by the radar chip (5), and / or conversely, especially in the case where radar waves are received by the radar chip (5) and / or opposite to the third direction (z).

4. The radar antenna (100) according to any one of the preceding claims, characterized in that, The second layer (2) has at least one second gap (20), the second gap extending at least partially in a channel-like manner along the first direction (x) and / or the second direction (y), wherein, preferably, a plurality of second gaps (20, 20.1, 20.2) are provided, each of the plurality of second gaps being at least partially in a channel-like manner along the first direction (x) and / or the second direction (y).

5. The radar antenna (100) according to any one of the preceding claims, characterized in that, The second layer (2) has a plurality of conductive, particularly metallic, through contacts (22) oriented along the third direction (z) and particularly along the first direction (x) and the second direction (y), particularly surrounding the at least one second gap (20) around the circumference. Preferably, each of the plurality of second gaps (20, 20.1, 20.2) is surrounded by a plurality of through contacts (22), particularly around the circumference.

6. The radar antenna (100) according to claim 5, characterized in that, The plurality of through contacts (22), particularly along the edges of the at least one second gap (20), preferably along the corresponding edges of the plurality of second gaps (20, 20.1, 20.2), and / or with intervals between each other, are designed to be smaller than the wavelength of the radar wave.

7. The radar antenna (100) according to any one of claims 5 or 6, characterized in that, Each of the plurality of through contacts (22) is electrically connected to the following structure: -A first conductive face segment (21.1) on the first surface (2.1) of the second layer (2), particularly opposite to the third direction (z), and / or - A second conductive face segment (21.2) on the second surface (2.2) of the second layer (2), particularly along the third direction (z). Each of the plurality of through contacts (22) is designed, particularly with respect to the length along a third direction (z) and / or the diameter of the hole, such that, in conjunction with the capacitance between the first conductive face segment (21.1) and the second conductive face segment (21.2), and particularly between the first layer (1) and / or the third layer (3), leakage of radar waves from the at least one second gap (20) is minimized, particularly in the operating frequency range of the radar chip (5).

8. The radar antenna (100) according to any one of the preceding claims, characterized in that, The third layer (3) has at least one third gap (30), preferably multiple third gaps (30, 30.1, 30.2), the third gap having at least one first wall and / or particularly a second wall opposite to the first wall, which has at least a partial angle between 0° and 180°, preferably between 0° and 90°, with the third direction (z), particularly having an acute angle, preferably between 5° and 85°, thereby forming a horn antenna-like shape.

9. The radar antenna (100) according to any one of the preceding claims, characterized in that, A first connecting layer (40) is provided between the first layer (1) and the second layer (2), the first connecting layer irreversibly fastening the first layer (1) and the second layer (2) together and preferably simultaneously achieving a predetermined interval between the first layer (1) and the second layer (2), wherein, in particular, the first connecting layer (40) has at least one first connecting element (41) for fastening the first layer (1) onto the second layer (2), and / or A second connecting layer (50) is provided between the second layer (2) and the third layer (3), the second connecting layer irreversibly fastening the second layer (2) and the third layer (3) together and preferably simultaneously achieving a predetermined interval between the second layer (2) and the third layer (3), wherein, in particular, the second connecting layer (50) has at least one second connecting element (51) for fastening the second layer (2) onto the third layer (3).

10. The radar antenna (100) according to any one of the preceding claims, characterized in that, At least one first spacer element (42) is provided between the first layer (1) and the second layer (2), particularly in the first connecting layer (40), the first spacer element realizing a predetermined interval between the first layer (1) and the second layer (2), and / or At least one second spacer element (52) is provided between the second layer (2) and the third layer (3), particularly in the second connecting layer (50), the second spacer element realizing a predetermined interval between the second layer (2) and the third layer (3).

11. The radar antenna (100) according to any one of the preceding claims, characterized in that, The first layer (1) has at least one conductive face segment (11) which is aligned along the third direction (z) with at least one second gap (20) and / or particularly with a plurality of through contacts (22) of the second layer (2). Preferably, the first layer (1) has a plurality of conductive face segments (11, 11.1, 11.2), each of which is aligned along the third direction (z) with one of the plurality of second gaps (20, 20.1, 20.2) in the second layer (2) and / or particularly with the plurality of through contacts (22).

12. The radar antenna (100) according to any one of the preceding claims, characterized in that, The third layer (3) has at least one conductive face segment (31), which is aligned along the third direction (z) with at least one second gap (20) of the second layer (2) and / or particularly with the plurality of through contacts (22), wherein, preferably, the third layer (3) has a plurality of conductive face segments (31, 31.1, 31.2), each of which is aligned along the third direction (z) with one of the second gaps (20, 20.1, 20.2) in the second layer (2) and / or particularly with the plurality of through contacts (22).

13. The radar antenna (100) according to any one of the preceding claims, characterized in that, The at least one first gap (10) and the at least one third gap (30) are arranged non-aligned with each other along the third direction (z), in particular the plurality of first gaps (10) and the plurality of third gaps (30, 30.1, 30.2) are arranged non-aligned with each other along the third direction.

14. The radar antenna (100) according to any one of the preceding claims, characterized in that, The first layer (1) has at least one first positioning gap, the second layer (2) has at least one second positioning gap and the third layer (3) has at least one third positioning gap, and in particular the first connecting layer (40) has at least one fourth positioning gap and in particular the second connecting layer (50) has at least one fifth positioning gap, and these positioning gaps are preferably aligned along the third direction (z).

15. The radar antenna (100) according to any one of the preceding claims, characterized in that, The first layer (1) has at least one first structure, the second layer (2) has at least one second structure and the third layer (3) has at least one third structure, and in particular the first connecting layer (40) has at least one fourth structure and in particular the second connecting layer (50) has at least one fifth structure, these structures are preferably configured to check the positioning of the first layer (1), the second layer (2) and / or the third layer (3) with respect to the first direction (x) and / or the second direction (y) and / or the third direction (z), particularly after the application and / or hardening of the first connecting layer (40) and / or the second connecting layer (50).

16. A method for manufacturing a radar antenna (100) according to any one of the preceding claims, the method comprising: - Provide (110) A first layer (1) having at least one first void (10). A second layer (2) having at least one second void (20), and A third layer (3) having at least one third void (30). - The second layer (2) is disposed (120) at a distance from the first layer (1) along the third direction (z), and in particular, the at least one second gap (20) is disposed aligned with at least one conductive face segment (11) of the first layer (1) along the third direction (z), and - The third layer (3) is provided (130) at intervals from the second layer (2) along the third direction (z), in particular the at least one second gap (20) is provided aligned with at least one conductive face segment (31) of the third layer (3) along the third direction (z), and in particular the at least one first gap (10) and the at least one third gap (30) are not aligned along the third direction (z).

17. A radar module or vehicle (200) comprising a radar antenna (100) according to any one of claims 1 to 15.

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