Antenna device, radio frequency transceiver, vehicle

Abstract

The present application relates to an antenna device, a radio frequency transceiver device, and a vehicle. The antenna device includes a first layer, the first layer includes a first surface providing a surface and a second surface located on the back side of the first surface; the first surface is provided with a gap; the second surface is provided with a plurality of protruding elements, the plurality of protruding elements surround a limited slot area on the second surface to form an electromagnetic band gap, the back side of the protruding element can form a magnetic conductor, which is used to cooperate with the third surface constituting an electric conductor to form a slot gap waveguide propagating along the slot area; wherein the gap is located within the range of the slot area.

Description

Technical Field

[0001] The present application relates to an antenna device, a radio frequency transceiver, and a vehicle. Background Art

[0002] Common waveguide methods, such as microstrip line waveguide and coplanar waveguide (CPW), can be implemented on a printed circuit board (PCB). The antenna structure formed in this way is compact, but such a structure is difficult to apply to the millimeter wave and sub-terahertz frequency bands due to high loss. Therefore, in the existing solutions, hollow waveguides are used for millimeter wave and sub-terahertz communication transmission, but hollow waveguides are difficult to integrate.

[0003] In order to overcome the above problems, an existing improved idea is to use substrate integrated waveguide (or called substrate integrated waveguide, SIW), but this solution still requires a dielectric substrate, so there will still be large dielectric loss.

[0004] For the above problems, one solution in this field is to adopt the Gap Waveguide (GW) solution, a new electromagnetic transmission and shielding technology based on the principle of non-contact electromagnetic band gap, which forms an electromagnetic band gap (EBG) without physical contact under certain conditions through a periodic electromagnetic structure, and uses the electromagnetic bandgap characteristics of EBG to construct a waveguide or shielding structure.

[0005] The basic principle model of the gap is the parallel plate perfect electric conductor-perfect magnetic conductor (PEC-PMC) model. The infinite PEC and PMC planes are placed parallel and non-contacting. According to the Maxwell equations and boundary conditions, when the plane spacing d between the PEC and PMC and the operating wavelength λ satisfy λ>4d, there is no propagation mode in the solution of the wave equation between the two planes, thus forming a frequency bandgap, forming an EBG structure. PMC structures do not exist in nature. Usually, a specific periodic structure is used to form an equivalent artificial magnetic conductor (AMC) surface to replace PMC. The most typical ones are the metal nail bed composed of a periodic metal convex array and the substrate-type gap waveguide structure constructed using a mushroom patch array.

[0006] Typical gap waveguide structures include groove gap waveguide (GGW), ridge gap waveguide (RGW), micro-strip ridge gap waveguide (MRGW), and inverted micro-strip gap waveguide (IMGW).

[0007] Among these four typical structures, the slot gap waveguide has a different working mode from the other three. In the slot gap waveguide, the role of the slot gap is equivalent to that of the rectangular waveguide, that is, the internal field distribution of the slot gap waveguide is similar to that of the rectangular waveguide, and the main transmission mode is the quasi-TE10 mode. The RGW consists of a dual-conductor transmission structure with a metal ridge and a non-contact PEC plane above, and uses PEC-AMC as an electromagnetic shielding structure. The transmission characteristics are similar to those of the microstrip line, and the main transmission mode is the quasi-TEM mode. The modes of MRGW, IMGW and RGW are essentially similar. When a substrate-type AMC is used in combination with a microstrip ridge structure, RGW can evolve into MRGW, also called substrate RGW. The IMGW structure is similar to the RGW. It is composed of a microstrip line without a metal coating on the back side placed on the AMC plane. The PEC surface above does not contact the microstrip line, and can be regarded as an inverted microstrip or suspended microstrip line in an AMC package.

[0008] For slot-gap waveguide structures, existing solutions such as Figure 5 As shown, the slot gap waveguide antenna includes a radiation layer 1000, a back cavity layer 2000 and a feeding layer 3000; the radiation layer 1000 includes a metal plate 1001, and a plurality of radiation slots 1002 are provided on the metal plate 1001; the back cavity layer 2000 includes a metal plate 2001 and a plurality of conductive needles 2002, and the conductive needles 2002 on the back cavity layer enclose a waveguide cavity, and the metal plate 2001 on the back cavity layer has back cavity slots; the feeding layer 3000 includes a metal plate 3001 and conductive needles 3002, and the conductive needles 3002 on the feeding layer 3000 enclose a waveguide cavity.

[0009] However, this three-layer structure is bulky and heavy, making it difficult to use in situations where space is restricted, such as automotive millimeter-wave radars. The three-layer structure also increases the cost of radar manufacturing. The above technology uses many conductive needles and gaps. The alignment of the conductive needles and gaps between each layer makes it very difficult to assemble the radar. Misalignment may cause the antenna to malfunction, which will seriously affect the detection performance of the radar.

[0010] Therefore, the art needs an antenna device, a radio frequency transceiver device, a vehicle and an assembly method, which can improve the integration of the slot gap waveguide antenna device on the basis of meeting the transmission requirements of millimeter waves, have a compact structure and be easy to assemble, thereby reducing the manufacturing cost. Utility Model Content

[0011] The technical problem to be solved by the present application is to improve the integration of the slot gap waveguide antenna device on the basis of meeting the transmission requirements of millimeter waves, so that the structure is compact and easy to assemble, thereby reducing the manufacturing cost.

[0012] The antenna device according to the first aspect of the present application includes: a first layer, the first layer includes a first surface providing a surface and a second surface located on the back side of the first surface; the first surface is provided with a gap; the second surface is provided with a plurality of protruding elements, and the plurality of protruding elements surround a limited slot area on the second surface to form an electromagnetic band gap, and the back side of the protruding elements can form a magnetic conductor for cooperating with the third surface constituting an electric conductor to form a slot gap waveguide propagating along the slot area; wherein the gap is located within the range of the slot area.

[0013] The beneficial effects of using the antenna device introduced above include but are not limited to realizing a slot gap waveguide structure in a single-layer structure, that is, the single-layer structure constitutes the functions of the radiation layer and the back cavity layer introduced in the background technology, so that the device does not need to adopt a stacked structure, so that the antenna device has a compact structure and is easy to integrate on the basis of meeting the transmission requirements of millimeter waves, and can realize the compact structure of the RF transceiver device where the antenna device is located, such as the compact structure of an automotive millimeter wave radar, so that the antenna device and the RF transceiver device are easy to arrange in a relatively small space, such as easy to arrange in a vehicle, and the assembly process is simpler, thereby improving the yield rate and reducing the assembly manufacturing cost.

[0014] In one or more embodiments of the antenna device, the slot includes at least one pair of slots arranged on the first surface, the pair of slots includes at least a first slot extending along the first axis and a second slot extending along the second axis, the slot area extends along a third axis, the first slot is arranged on one side of the third axis, the second slot is arranged on the other side of the third axis, the first slot and the second slot are adjacently spaced in the direction of extension of the third axis; the back side of the protruding element is set to be at a distance of 0.040mm-0.075mm from the third surface.

[0015] In one or more embodiments of the antenna device, a plurality of pairs of slots are provided on the first surface, and the plurality of pairs of slots are arranged adjacently and spaced apart along the third axis.

[0016] In one or more embodiments of the antenna device, the first pair of slots closest to the protruding element in the extension direction of the third axis is at a distance of one quarter of a wavelength from the protruding element.

[0017] In one or more embodiments of the antenna device, the extension length of the slot is half a wavelength; the first axis, the second axis, and the third axis are parallel; the first slot is arranged on one side of the third axis, and the distance between the first slot and the third axis is a first distance; the second slot is arranged on the other side of the third axis, and the distance between the second slot and the third axis is a second distance; and the first distance is 1.5 to 2.5 times the second distance.

[0018] In one or more embodiments of the antenna device, at least three pairs of slots are arranged on the first surface, including a first pair of slots, a second pair of slots, and a third pair of slots that are adjacent to each other and spaced apart along the direction of the third axis, wherein the distance between the first slot and the second slot in the third pair of slots and the third axis is smaller than the distance between the first pair of slots, the second pair of slots and the third axis.

[0019] A radio frequency transceiver according to a second aspect of the present application includes the antenna device as described in the first aspect.

[0020] In one or more embodiments of the radio frequency transceiver device, the radio frequency transceiver device includes a radar, and the radio frequency transceiver device includes a printed circuit board, and the printed circuit board provides the third surface.

[0021] A vehicle according to a third aspect of the present application comprises the antenna device as described in the first aspect.

[0022] According to a fourth aspect of the present application, a method for assembling a radio frequency transceiver device includes:

[0023] Using the antenna device as described in the first aspect as a first assembly unit;

[0024] Using a component having a printed circuit board as a second assembly unit;

[0025] The first assembly unit is packaged to the second assembly unit so that the printed circuit board provides the third surface, which, together with the second surface and the protruding element, forms a slot gap waveguide that propagates along the slot region. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings, wherein:

[0027] Figures 1A to 1Cis a schematic structural diagram of an antenna device according to a first embodiment of the present application;

[0028] Figure 2 is an antenna azimuth plane pattern @76.5 GHz of an antenna device according to an embodiment of the present application;

[0029] Figure 3 is an antenna elevation plane pattern @76.5GHz of an antenna device according to an embodiment of the present application;

[0030] Figure 4 : is a standing wave curve of the antenna S11 of the antenna device according to an embodiment of the present application.

[0031] Figure 5 It is a structural schematic diagram of a slot gap waveguide antenna in the prior art.

[0032] Reference numerals:

[0033] 10- Antenna device

[0034] 1- First layer

[0035] 11-Side 1

[0036] 110-Gap

[0037] 1101-The first pair of gaps

[0038] 1102-Second pair of gaps

[0039] 1103-The third pair of gaps

[0040] 111-First Gap

[0041] 1110-First Axis

[0042] 112-Second Gap

[0043] 1120-Second Axis

[0044] 12-Side 2

[0045] 121-slot area

[0046] 1210-The Third Axis

[0047] 13-Protruding elements

[0048] 131-Back side of protruding element

[0049] 100-RF transceiver

[0050] 101-Printed circuit board. DETAILED DESCRIPTION

[0051] The present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present application in any way.

[0052] The following description is given to enable those skilled in the art to implement and use the application and to incorporate it into a specific application context. Various modifications and various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the application is not limited to the embodiments provided herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein. In the following detailed description, many specific details are set forth to provide a more thorough understanding of the application. However, it will be apparent to those skilled in the art that the practice of the application may not be limited to these specific details. In other words, known structures and devices are shown in block diagram form without detailed display to avoid blurring the application.

[0053] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] The antenna device introduced below is applied to a radio frequency transceiver device, such as a radar, especially a millimeter wave radar for a vehicle, but is not limited to this. The radio frequency transceiver device can also be a radio base station for a cellular access network, a microwave radio link transceiver for backhauling to a core network, and a satellite transceiver for communicating with a satellite in orbit. As long as it can transmit and receive radio frequency (RF) signals, the antenna device introduced below can be applied to make the structure of the radio frequency transceiver compact and easy to assemble.

[0055] refer to Figures 1A to 1C As shown, the antenna device 10 includes a first layer 1, and the first layer 1 includes a first surface 11 providing a surface and a second surface 12 located on the back side of the first surface 11. The first surface 11 is provided with a slot 110, and the second surface 12 is provided with a plurality of protruding elements 13, and the plurality of protruding elements 13 surround and define a slot area 121 on the second surface 12 to form an electromagnetic band gap, and the back side 131 of the protruding element can form a magnetic conductor, which is used to cooperate with the third surface 21 constituting an electric conductor to form a slot gap waveguide propagating along the slot area 121, and the slot 110 is located within the range of the slot area 121.

[0056] The meaning of "gap" here is that its function is similar to that introduced in the previous section. Figure 5 The depth of the radiation slot shown can be a cut through the thickness of the first layer 1, that is, the slot 110 is visible when observed from the first surface 11 and the second surface 12 respectively. The slot is usually rectangular or elliptical, its extension length is about half a wavelength, and its width is generally less than the extension length. Controlling the electromagnetic coupling of the radio frequency (RF) signal can enter each slot along the waveguide. The excitation of each slot (i.e., the coupling to each slot) affects the side lobe level (SSL) in the radiation pattern from the slot array in the waveguide.

[0057] The meaning of the protruding element 13 is that in the structure of the gap waveguide described above, a specific periodic structure is used to form an equivalent artificial magnetic conductor (AMC) surface instead of PMC. The most typical ones are a metal nail bed composed of a periodic metal convex array and a mushroom patch array. Here, the nail bed structure is taken as an example. The nail bed can be a cube or a cylinder. The cylindrical nail bed structure is easy to process. The nail bed structure encloses a waveguide cavity structure, that is, the above-mentioned surrounding limited slot area 121.

[0058] The third surface 21 may be a metal surface of the RF transceiver itself, such as a metal layer (such as a copper-plated area) on a PCB of a millimeter-wave radar, that is, a PEC as a gap waveguide structure may be provided without the need for additional processing of the third surface.

[0059] It can be understood that, according to the principle of forming a gap waveguide structure, the distance between the back surface 131 of the protruding element and the third surface 21 needs to be less than a quarter of a wavelength.

[0060] In addition, the first layer here can be a pure metal layer, so that the first surface and the second surface are metal surfaces, or a non-metallic substrate with a metal coating provided on the surface. In addition, the first surface 11, the second surface 12 and the third surface 21 can be a planar structure, but are not limited thereto, for example, they can also be a structure that is at least partially curved.

[0061] The "groove gap waveguide" defined here has a meaning similar to that described above, i.e., the above-mentioned groove gap waveguide (GGW) structure, whose working mode is that in the groove gap waveguide, the role of the groove gap is equivalent to that of the rectangular waveguide, i.e., the internal field distribution of the groove gap waveguide is similar to that of the rectangular waveguide, and the main transmission mode is the quasi-TE10 mode. It can be understood that, as described above, the groove gap waveguide is different from the ridge gap waveguide (RGW), micro-strip ridge gap waveguide (MRGW), and inverted micro-strip gap waveguide (IMGW) in structure and working mode, and the meaning of the groove gap waveguide here should not be interpreted as including ridge gap waveguide, micro-strip ridge gap waveguide, and inverted micro-strip gap waveguide.

[0062] The beneficial effects of the antenna device scheme introduced above include, but are not limited to, realizing the structure of the slot gap waveguide in a single-layer structure, that is, the single-layer structure constitutes the functions of the radiation layer and the back cavity layer introduced in the background technology, so that the device does not need to adopt a stacked structure, so that the antenna device is compact and easy to integrate on the basis of meeting the transmission requirements of millimeter waves, and can realize the compact structure of the radio frequency transceiver device where the antenna device is located, such as the compact structure of the automotive millimeter wave radar, so that the antenna device and the radio frequency transceiver device are easy to arrange in a relatively small space, such as easy to arrange in a vehicle, and the assembly process is simpler, the yield rate is improved, and the assembly manufacturing cost is reduced. In addition, because the waveguide cavity surrounded by the antenna structure and the nail bed structure is on the same structural part, there is no dimensional error caused by installation and performance loss caused by the error, which reduces the installation requirements and further simplifies the installation process.

[0063] Continue to refer Figures 1A to 1C As shown, the gap includes at least one pair of gaps arranged on the first surface 11, the pair of gaps at least includes a first gap 111 extending along the first axis 1110, a second gap 112 extending along the second axis 1120, the groove area 121 extends along the third axis 1210, and the first gap 111 is arranged on one side of the third axis 1210, for example Figure 1A On the right side shown, the second gap 112 is provided on the other side of the third axis 1210, for example Figure 1AAs shown on the left side, the first slot 111 and the second slot 112 are arranged adjacently and spaced apart in the direction in which the third axis 1210 extends. The beneficial effect of this is that the left and right sides are arranged alternately, and a high antenna efficiency can be maintained. In addition, the inventors found that although in theory the distance between the back surface 131 of the protruding element and the third surface 21 needs to be less than a quarter wavelength (for millimeter waves, it needs to be less than 1 / 4 mm, i.e. 0.25 mm), preferably, since the embodiment adopts an integrated slot gap waveguide structure, when the back surface 131 of the protruding element 13 is set to be 0.040 mm-0.075 mm away from the third surface 21, the requirements of the detection angle, the RF working bandwidth, etc. can be better met. In a pair of proportions, the inventors tried to set the back surface 131 of the protruding element 13 to be 0.010 mm-0.030 mm away from the third surface 21. At this time, the effect was poor and could not meet the requirements.

[0064] Continue to refer Figures 1A to 1C As shown, in some embodiments, the number of slots can be that a plurality of pairs of slots are provided on the first surface 11, and the plurality of pairs of slots are arranged adjacently and spaced apart along the third axis 1210. For example, the structure of three pairs (six) of slots shown in the figure can be understood that the number of slots here depends on the requirements of the specific scene, such as the gain and elevation beam width requirements of the radar antenna. If the antenna gain needs to be higher than that of the structure with six slots and the elevation beam width is narrower, the number of slots can be increased accordingly. Preferably, as Figure 1A As shown, for the structure of multiple pairs of slots, the first slot 111 of the first pair of slots 1101 closest to the protruding element 13 in the extending direction of the third axis is at a distance of one quarter wavelength from the protruding element 13, so that the slot-slot gap is better matched, further improving the efficiency of the antenna. In addition, the first axes 1110 of the first slots 111 of different pairs of slots may be non-collinear, and similarly, the second axes 1210 of the second slots 112 of different pairs of slots may also be non-collinear.

[0065] Preferably, in some embodiments, the first axis 1110, the second axis 1120, and the third axis 1210 are parallel; the first gap 111 is arranged on one side of the third axis 1210, and the distance between the first gap 111 and the third axis 1210 is a first distance; the second gap 112 is arranged on the other side of the third axis 1210, and the distance between the second gap 112 and the third axis 1210 is a second distance, and the first distance is 1.5 to 2.5 times the second distance. By adopting an asymmetric structure, the effect of waveguide transmission can be further optimized in the slot gap waveguide structure introduced in the above embodiments.

[0066] Preferably, for a structure with at least three pairs of gaps, a first pair of gaps 1101, a second pair of gaps 1102, and a third pair of gaps 1103 are respectively spaced apart and adjacent to each other along the direction of the third axis 1210, wherein the distance between the first gap and the second gap in the third pair of gaps 1103 and the third axis 1210 is smaller than the distance between the first pair of gaps 1101, the second pair of gaps 1103 and the third axis 1210, that is, the distance between the first gap 111 of the first pair of gaps 1101, the second pair of gaps 1102 and the third axis 1210 is greater than the distance between the first gap 111 of the third pair of gaps 1103 and the third axis 1210; the distance between the second gap 112 of the first pair of gaps 1101, the second pair of gaps 1102 and the third axis 1210 is greater than the distance between the second gap 112 of the third pair of gaps 1103 and the third axis 1210. The structure in which the last pair of slots is at a shorter distance from the third axis can further optimize the effect of waveguide transmission in the slot gap waveguide structure introduced in the above embodiment.

[0067] In order to more clearly describe the content of the present application, a specific example is used below to illustrate the technical solution of one or more embodiments of the present application.

[0068] for Figures 1A to 1C The antenna device 10 shown has three pairs (six) of slots 110 .

[0069] Among them, in the extension direction of the third axis 1210, that is, the X direction, the spacing between the first gap 111 of the first pair of gaps 1101 and the second gap 112 of the first pair of gaps 1101 is 2.679mm, the spacing between the second gap 112 of the first pair of gaps 1101 and the first gap 111 of the second pair of gaps 1102 is 2.67mm, the spacing between the first gap 111 of the second pair of gaps 1102 and the second gap 112 of the second pair of gaps 1102 is 2.6446mm, the spacing between the second gap 112 of the second pair of gaps 1102 and the first gap 111 of the third pair of gaps 1103 is 2.519mm, and the spacing between the first gap 111 of the third pair of gaps 1103 and the second gap 112 of the third pair of gaps 1103 is 2.243mm.

[0070] In the direction of the second surface perpendicular to the third axis 1210, i.e., the Y direction, the distances between each gap and the third axis 1210 are respectively: the first gap 111 of the first pair of gaps 1101 is 0.234 mm from the center, the second gap 112 of the first pair of gaps 1101 is 0.416 mm from the center, the first gap 111 of the second pair of gaps 1102 is 0.235 mm from the center, the second gap 112 of the second pair of gaps 1102 is 0.51 mm from the center, the first gap 111 of the third pair of gaps 1103 is 0.166 mm from the center, and the second gap 112 of the third pair of gaps 1103 is 0.355 mm from the center.

[0071] The distances between each gap and the protruding element 13 in the Y direction are as follows: the distance between the first gap 111 of the first pair of gaps 1101 and the protruding element 13 closest to the Y direction (hereinafter referred to as the adjacent nail bed) is 1.3717 mm, the distance between the second gap 112 of the first pair of gaps 1101 and the adjacent nail bed is 1.189 mm, the distance between the first gap 111 of the second pair of gaps 1102 and the adjacent nail bed is 1.37 mm, the distance between the second gap 112 of the second pair of gaps 1102 and the adjacent nail bed is 1.0953 mm, the distance between the first gap 111 of the third pair of gaps 1103 and the adjacent nail bed is 1.439 mm, and the distance between the second gap 112 of the third pair of gaps 1103 and the adjacent nail bed is 1.25 mm.

[0072] The rear surface 131 of the protruding element 13 is arranged at a distance of 0.060 mm from the third surface 21 .

[0073] The antenna azimuth plane radiation pattern, antenna elevation plane radiation pattern and S11 standing wave curve of the antenna device are obtained as follows: Figure 2 , Figure 3 , Figure 4 As shown. Figure 2 As shown in the figure, the azimuth plane radiation pattern of the antenna at the 76GHz frequency point. From the azimuth plane curve, it can be seen that the gain of the antenna at ±45° is greater than 12dB, and the gain at ±75° is greater than 8.5dB (8.7dB), which meets the needs of corner radar for large-angle detection. Specifically, taking the vehicle radar as an example, its operating bandwidth is 76GHz to 81GHz. According to the radar equation:

[0074]

[0075] Among them, Pt is the radar transmission power signal, the antenna transmission and receiving gains are Gt and Gr respectively, σ is the RCS (scattering cross-sectional area) of the target, λ is the wavelength, Nr is the number of sampling points in the distance dimension, Nd is the number of sampling points in the speed dimension, k is the Boltzmann constant, B is the receiver bandwidth (that is, the sampling bandwidth of the ADC), T0 is the standard room temperature (generally 290K), Fn is the noise coefficient, SNRomin is the signal-to-noise ratio threshold, and L is the system loss. Therefore, the gain at ±75° is 8.7dB, and the corresponding radar antenna detection distance can reach 75m, which is much larger than the conventional angle radar antenna 75°.

[0076] refer to Figure 3 As shown, the sidelobe level of the antenna elevation plane is lower than -19dB, which also meets the requirement that the sidelobe level of the radar antenna is designed to be less than -15dB.

[0077] refer to Figure 4 The standing wave curve of antenna S11 is shown. From the curve, it can be seen that the -10dB operating bandwidth of the antenna is 75-80.8GHz, covering the operating bandwidth of the vehicle's radar (76GHz to 81GHz).

[0078] It can be seen that the above antenna device can better meet the requirements of the transceiver device as a vehicle radar device. It can be understood that the above values ​​are only used as specific examples, and the size parameters must not be limited to the above values. The inventors have found that the above values ​​can basically achieve the required results within the range of about ±30%. If it exceeds this range, it is likely that the requirements cannot be met. For example, in a pair of proportions, the back surface 131 of the protruding element 13 is set to be 0.010mm-0.030mm away from the third surface 21. Although it also meets the basic requirement that the distance between the back surface 131 of the protruding element and the third surface 21 needs to be less than a quarter of a wavelength (based on the basic principle of the gap waveguide), it cannot meet the gain and / or working bandwidth requirements introduced above.

[0079] As described above, the present application further provides an assembly method of a radio frequency transceiver device 100, comprising:

[0080] The antenna device 10 described in the above embodiment is used as the first assembly unit;

[0081] Using a component having a printed circuit board 101 as a second assembly unit;

[0082] The first assembly unit is packaged into the second assembly unit so that the printed circuit board 101 provides the third surface 21, which, together with the second surface 12 and the protruding element 13, forms a slot gap waveguide that propagates along the slot area 121. The beneficial effect of this is that since the number of layers of the slot gap waveguide design is reduced, the bottom metal layer is shared with the metal layer on the PCB board of the RF transceiver device, thereby reducing the manufacturing cost of the RF transceiver device (such as a car radar). In addition, since the waveguide cavity surrounded by the antenna structure and the bed of nails structure is on the same structural component, there is no dimensional error caused by installation and no performance loss caused by the error, thereby reducing the installation requirements and further simplifying the installation process.

[0083] In summary, the beneficial effects of using the above antenna device, RF transceiver device, vehicle and assembly method include but are not limited to realizing the structure of the slot gap waveguide in a single-layer structure, that is, the single-layer structure constitutes the functions of the radiation layer and the back cavity layer introduced in the background technology, so that the device does not need to adopt a stacked structure, so that the antenna device is compact and easy to integrate on the basis of meeting the transmission requirements of millimeter waves, and the structure of the RF transceiver device where the antenna device is located can be compact, such as the structure of a car millimeter wave radar, so that the antenna device and the RF transceiver device are easy to arrange in a relatively small space, such as easy to arrange in a vehicle, and the assembly process is simpler, the yield rate is improved, and the assembly manufacturing cost is reduced. In addition, because the waveguide cavity surrounded by the antenna structure and the nail bed structure is on the same structural part, there is no dimensional error caused by installation and performance loss caused by the error, which reduces the installation requirements and further simplifies the installation process.

[0084] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. However, it should be understood that the scope of protection of the present application shall be subject to the appended claims and shall not be limited to the specific structures and components of the above-described embodiments. Those skilled in the art may make various changes and modifications to the embodiments within the spirit and scope of the present application, and these changes and modifications also fall within the scope of protection of the present application.

Claims

1. An antenna device (10), characterized in that: include: A first layer (1), the first layer (1) comprising a first surface (11) providing a surface and a second surface (12) located on the back side of the first surface (11); The first surface (11) is provided with a gap (110); The second surface (12) is provided with a plurality of protruding elements (13), the plurality of protruding elements (13) surround and define a slot region (121) on the second surface (12) to form an electromagnetic band gap, and the back surface (131) of the protruding elements can form a magnetic conductor, which is used to cooperate with the third surface (21) forming an electric conductor to form a slot gap waveguide propagating along the slot region (121); Wherein, the gap (110) is located within the range of the groove area (121).

2. The antenna device (10) according to claim 1, characterized in that The slits include at least one pair of slits arranged on the first surface (11), the pair of slits at least including a first slit (111) extending along the first axis (1110) and a second slit (112) extending along the second axis (1120); the groove area (121) extends along a third axis (1210); the first slit (111) is arranged on one side of the third axis (1210); the second slit (112) is arranged on the other side of the third axis (1210); the first slit (111) and the second slit (112) are arranged adjacent to each other in the direction in which the third axis (1210) extends; the back side (131) of the protruding element (13) is arranged to be at a distance of 0.040 mm to 0.075 mm from the third surface (21).

3. The antenna device (10) according to claim 2, characterized in that A plurality of pairs of slits are provided on the first surface (11), and the plurality of pairs of slits are arranged adjacently and spaced apart along the third axis (1210).

4. The antenna device (10) according to claim 2, characterized in that The first pair of slits closest to the protruding element (13) in the extension direction of the third axis are at a distance of a quarter of a wavelength from the protruding element (13).

5. The antenna device (10) according to claim 2, characterized in that The extension length of the slit is half a wavelength; the first axis (1110), the second axis (1120), and the third axis (1210) are parallel; the first slit (111) is arranged on one side of the third axis (1210), and the distance between the first slit (111) and the third axis (1210) is a first distance; the second slit (112) is arranged on the other side of the third axis (1210), and the distance between the second slit (112) and the third axis (1210) is a second distance, and the first distance is 1.5 to 2.5 times the second distance.

6. The antenna device (10) according to any one of claims 1 to 5, characterized in that: At least three pairs of slits are arranged on the first surface (11), including a first pair of slits (1101), a second pair of slits (1102), and a third pair of slits (1103) which are arranged adjacent to each other along the direction of the third axis (1210), wherein the distance between the first slit and the second slit in the third pair of slits (1103) and the third axis (1210) is smaller than the distance between the first pair of slits (1101), the second pair of slits (1103) and the third axis (1210).

7. A radio frequency transceiver (100), characterized in that: The invention comprises the antenna device (10) as claimed in any one of claims 1 to 6.

8. The radio frequency transceiver (100) according to claim 7, characterized in that: The radio frequency transceiver (100) comprises a radar, and the radio frequency transceiver (100) comprises a printed circuit board (101), wherein the printed circuit board (101) provides the third surface (21).

9. A vehicle, characterized in that: The invention comprises the antenna device (10) as claimed in any one of claims 1 to 6.

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