CN117712674A - Antenna device, radio frequency transceiver device, vehicle and assembly method - Google Patents

Abstract

The application relates to an antenna device, a radio frequency transceiver device, a vehicle and an assembly method. Wherein the antenna device comprises a first layer comprising a first face providing a surface and a second face located on a back side of the first face; the first surface is provided with a gap; the second face is provided with a plurality of protruding elements surrounding a defined slot region at the second face, constituting an electromagnetic bandgap, the back face of the protruding elements being capable of constituting a magnetic conductor for cooperation with a third face constituting an electrical conductor, forming a slot gap waveguide propagating along the slot region; wherein the gap is located within the confines of the slot region.

Description

Antenna device, radio frequency transceiver device, vehicle and assembly method

Technical Field

The application relates to an antenna device, a radio frequency transceiver device, a vehicle and an assembly method.

Background

Common waveguide modes, such as microstrip line waveguide (microstrip line) and coplanar waveguide (Coplanar waveguide, CPW), can be realized on a Printed Circuit Board (PCB), so that the antenna structure is compact, but the structure is difficult to apply to millimeter wave and sub-terahertz frequency bands due to high loss. Therefore, in the existing scheme, the hollow waveguide is adopted for millimeter wave and sub-terahertz communication transmission, but the hollow waveguide is difficult to integrate.

To overcome the above problems, an improved idea is to use a substrate integrated waveguide (or called substrate integrated waveguide, substrate Integrated Waveguide, SIW), but this solution still requires a dielectric substrate, so that a large dielectric loss still exists.

For the above problems, one solution in the art is to use a Gap Waveguide (GW) solution, and a novel electromagnetic transmission and shielding technology based on a non-contact electromagnetic bandgap principle forms an electromagnetic bandgap (Electromagnetic Band Gap, EBG) without physical contact under certain conditions through a periodic electromagnetic structure, and constructs a guided wave or shielding structure by using the electromagnetic bandgap characteristics of the EBG.

The basic principle model of the gap is a parallel plate ideal electric conductor-ideal magnetic conductor (Perfect Electric Conductor-Perfect Magnetic Conductor, PEC-PMC) model, an infinite PEC is placed in parallel with a PMC plane and is not contacted, and according to a Maxwell equation set and boundary conditions, when the distance d between the PEC plane and the PMC plane and the working wavelength lambda meet lambda >4d, a propagation mode does not exist in a solution of a wave equation between the two planes, so that a frequency forbidden band is formed, and an EBG structure is formed. In nature, no PMC structure exists, and a specific periodic structure is generally adopted to form an equivalent artificial magnetic conductor (Artificial Magnetic Conductor, AMC) surface to replace PMC, and the most typical structure is a metal nail bed formed by a periodic metal convex array and a substrate type gap waveguide structure formed by a mushroom patch array.

Typical gap waveguide structures include slot gap waveguides (Groove Gap Waveguide, GGW), ridge gap waveguides (Ridge Gap Waveguide, RGW), microstrip ridge gap waveguides (Micro-strip Ridge Gap Waveguide, MRGW), inverted microstrip gap waveguides (embedded Micro-strip Gap Waveguide, IMGW).

In these four typical structures, the slot gap waveguide is different from the remaining three modes of operation. In the slot gap waveguide, the function of the slot gap is equivalent to that of a rectangular waveguide, namely the internal field distribution of the slot gap waveguide is similar to that of the rectangular waveguide, and the transmission main mode is quasi TE10 mode. The RGW forms a double-conductor transmission structure by a metal ridge and a PEC plane which is not contacted above, the PEC-AMC is used as an electromagnetic shielding structure, the transmission characteristic is similar to a microstrip line, and the transmission main mode is a quasi-TEM mode. Whereas the modes of MRGW, IMGW and RGW are essentially similar, RGW may evolve into MRGW, also referred to as substrate RGW, when substrate-type AMC is employed in conjunction with microstrip ridge structures. The IMGW structure is similar to RGW, and is formed by placing a microstrip line without a metal coating on the back surface on the AMC plane, and the PEC surface above the IMGW structure is not contacted with the microstrip line, so that the IMGW structure can be regarded as an inverted microstrip or a suspended microstrip line in the AMC packaging form.

For a slot gap waveguide structure, a conventional solution is shown in fig. 5, for example, the slot gap waveguide antenna includes a radiation layer 1000, a back cavity layer 2000, and a feed layer 3000; the radiation layer 1000 comprises a metal flat plate 1001, and a plurality of radiation gaps 1002 are formed on the metal flat plate 1001; the back cavity layer 2000 comprises a metal flat plate 2001 and a plurality of conductive pins 2002, the conductive pins 2002 on the back cavity layer are enclosed to form a waveguide cavity, and a back cavity gap is formed on the metal flat plate 2001 on the back cavity layer; the feed layer 3000 includes a metal plate 3001 and conductive pins 3002, and the conductive pins 3002 on the feed layer 3000 enclose a waveguide cavity.

However, the three-layer structure has a heavy volume and weight, is difficult to be used in occasions with limited space, such as millimeter wave radar of an automobile, and the three-layer structure design also increases the manufacturing cost of the radar.

Therefore, there is a need in the art for an antenna device, a radio frequency transceiver device, a vehicle, and an assembly method that improve the integration level of a slot gap waveguide antenna device on the basis of meeting the millimeter wave transmission requirement, and that is compact in structure and easy to assemble, thereby reducing the manufacturing cost.

Disclosure of Invention

The technical problem to be solved by the application is to improve the integration level of the slot gap waveguide antenna device on the basis of meeting the transmission requirement of millimeter waves, and the slot gap waveguide antenna device has compact structure, is easy to assemble and reduces the manufacturing cost.

An antenna device according to a first aspect of the present application, comprising: a first layer including a first face providing a surface and a second face located on a back side of the first face; the first surface is provided with a gap; the second face is provided with a plurality of protruding elements surrounding a defined slot region at the second face, constituting an electromagnetic bandgap, the back face of the protruding elements being capable of constituting a magnetic conductor for cooperation with a third face constituting an electrical conductor, forming a slot gap waveguide propagating along the slot region; wherein the gap is located within the confines of the slot region.

The antenna device has the beneficial effects that the structure of the slot gap waveguide is realized in a single-layer structure, namely, the functions of the radiation layer and the back cavity layer introduced in the background art are formed through the single-layer structure, so that the device does not need to adopt a stacked structure, the antenna device is compact in structure and easy to integrate on the basis of meeting the transmission requirement of millimeter waves, the structure of a radio frequency transceiver device where the antenna device is located can be compact, for example, the structure of an automobile millimeter wave radar is compact, the antenna device and the radio frequency transceiver device are easy to arrange in a narrow space, for example, the arrangement in a vehicle is easy, the assembly process is simpler, the yield is improved, and the assembly manufacturing cost is reduced.

In one or more embodiments of the antenna device, the slot comprises at least one pair of slots disposed on a first face, the pair of slots comprising at least a first slot extending along a first axis, a second slot extending along a second axis, the slot region extending along a third axis, the first slot disposed on one side of the third axis, the second slot disposed on the other side of the third axis, the first slot and the second slot disposed adjacently and at intervals in a direction in which the third axis extends; the back surface of the protruding element is arranged at a distance of 0.040mm-0.075mm from the third face.

In one or more embodiments of the antenna device, a plurality of pairs of slots are provided in the first face, the pairs of slots being adjacently spaced along the third axis.

In one or more embodiments of the antenna arrangement, the first pair of slits closest to the protruding element in the direction of extension of the third axis is spaced from the protruding element by a quarter wavelength.

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

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

A radio frequency transceiver device according to a second aspect of the present application comprises an antenna device as described in the first aspect.

In one or more embodiments of the radio frequency transceiver, the radio frequency transceiver comprises a radar, the radio frequency transceiver comprises a printed circuit board, the printed circuit board providing the third face.

A vehicle according to a third aspect of the present application, comprising an antenna arrangement as described in the first aspect.

A method of assembling a radio frequency transceiver device according to a fourth aspect of the present application, comprising:

adopting the antenna device according to the first aspect as a first mounting unit;

adopting a component with a printed circuit board as a second assembly unit;

the first mounting unit is packaged to the second mounting unit such that the printed circuit board provides the third face, and the second face and the protruding element form a slot gap waveguide that propagates along the slot region.

Drawings

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below, wherein:

fig. 1A to 1C are schematic structural views of an antenna device according to a first embodiment of the present application;

fig. 2 is an antenna azimuth plane pattern @76.5GHz of an antenna device of an embodiment of the present application;

FIG. 3 is an antenna elevation pattern @76.5GHz of an antenna assembly according to an embodiment of the present application;

fig. 4 is an antenna S11 standing wave curve of an antenna device according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a prior art slot gap waveguide antenna.

Reference numerals:

10-antenna device

1-first layer

11-first side

110-gap

1101-first pair of slits

1102-second pair of slits

1103-third pair of slits

111-first gap

1110-first axis

112-second gap

1120-second axis

12-second side

121-groove region

1210-third axis

13-projecting element

131-back of protruding element

100-radio frequency transceiver

101-printed circuit board.

Detailed Description

The invention is described in detail below with reference to the drawings and the specific embodiments. It is noted that the aspects described below in connection with the drawings and the specific embodiments are merely exemplary and should not be construed as limiting the scope of the invention in any way.

The following description is presented to enable one skilled in the art to make and use the invention and to incorporate it into the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to persons skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without limitation to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The antenna device described below is applied to a Radio Frequency transceiver device, such as a millimeter wave radar for a radar, particularly for a vehicle, but not limited to, the Radio Frequency transceiver device may also be a Radio base station for a cellular access network, a microwave Radio link transceiver for transmitting back to a core network, and a satellite transceiver for communicating with a satellite on an orbit, so long as the antenna device described below can transmit and receive Radio Frequency (RF) signals, so that the Radio Frequency transceiver device is compact and easy to assemble.

Referring to fig. 1A to 1C, the antenna device 10 includes a first layer 1, and the first layer 1 includes a first face 11 providing a surface and a second face 12 located on a back side of the first face 11. The first face 11 is provided with a slot 110 and the second face 12 is provided with a plurality of protruding elements 13, the plurality of protruding elements 13 surrounding a defined slot region 121 at the second face 12, constituting an electromagnetic bandgap, the back faces 131 of the protruding elements being able to constitute magnetic conductors for cooperation with the constituting electrical conductor third face 21 forming a slot gap waveguide propagating along the slot region 121, while the slot 110 is located within the confines of the slot region 121.

The term "slit" is used herein to mean that the depth of the radiation slit shown in fig. 5, which is described between the action of the slit and the depth of the slit, may be a cut through the thickness of the first layer 1, i.e. the slit 110 is visible when the slit 110 is viewed on the first side 11 and the second side 12, respectively. The slit is generally rectangular or oval, has an extension of about one-half wavelength, and has a width generally less than the extension. Control Radio Frequency (RF) signals can enter the electromagnetic coupling of each slot along the waveguide. Excitation of each slot (i.e., coupling to each slot) affects the side lobe level (SSL) in the radiation pattern from the slot array in the waveguide.

The meaning of the protruding elements 13, i.e. the above description of the structure constituting the gap waveguide, is that a specific periodic structure is used to form an equivalent artificial magnetic conductor (Artificial Magnetic Conductor, AMC) plane instead of PMC, most typically a metal nail bed consisting of a periodic array of metal protrusions and a mushroom patch array, here exemplified by a nail bed structure. The nail bed can be square or cylindrical, and the cylindrical nail bed structure is easy to process, and the nail bed structure encloses a waveguide cavity structure, namely the surrounding and limiting groove area 121.

The third surface 21 may be a metal surface of the rf transceiver, such as a metal layer (e.g. copper-clad) on a PCB of a millimeter wave radar, so as to provide PEC as a gap waveguide structure without additional processing of the third surface.

It will be appreciated that the distance of the back surface 131 of the protruding element from the third surface 21 needs to be less than a quarter wavelength, depending on the principle of constructing a gap waveguide structure.

In addition, the first layer may be a pure metal layer, so that the first surface and the second surface are metal surfaces, or a non-metal substrate may be provided with a metal coating on the surface. The first surface 11, the second surface 12, and the third surface 21 may have a planar structure, but are not limited thereto, and may have a structure at least partially curved, for example.

The meaning of the "slot gap waveguide" as defined herein is similar to that described above, namely, the above-mentioned slot gap waveguide (Groove Gap Waveguide, GGW) structure has an operation mode that is in the slot gap waveguide, and the slot gap function is equivalent to that of a rectangular waveguide, namely, the internal field distribution of the slot gap waveguide is similar to that of the rectangular waveguide, and the transmission main mode is quasi-TE 10 mode. It will be appreciated that, as described above, the slot gap waveguide differs from the ridge gap waveguide (Ridge Gap Waveguide, RGW), microstrip ridge gap waveguide (Micro-strip Ridge Gap Waveguide, MRGW), inverted microstrip gap waveguide (Inverted Micro-strip Gap Waveguide, IMGW) in terms of structure, mode of operation, and the meaning of slot gap waveguide herein should not be construed as encompassing ridge gap waveguide, microstrip ridge gap waveguide, inverted microstrip gap waveguide.

The beneficial effects of the scheme of the antenna device include, but are not limited to, realizing the structure of the slot gap waveguide in the single-layer structure, namely forming the functions of the radiation layer and the back cavity layer introduced in the background art through the single-layer structure, so that the device does not need to adopt a stacked structure, the antenna device is compact in structure and easy to integrate on the basis of meeting the transmission requirement of millimeter waves, and the radio frequency transceiver device where the antenna device is located can be compact in structure, such as an automobile millimeter wave radar, so that the antenna device and the radio frequency transceiver device are easy to be arranged in a narrow space, such as a vehicle, the assembly process is simpler, the yield is improved, and the assembly manufacturing cost is reduced. In addition, the waveguide cavity enclosed by the antenna structure and the nail bed structure is arranged on the same structural member, so that dimensional errors caused by installation and performance loss caused by the errors are avoided, the installation requirement is reduced, and the installation process is further simplified.

With continued reference to fig. 1A-1C, the slit includes at least one pair of slits disposed on the first face 11, the pair of slits including at least a first slit 111 extending along the first axis 1110, a second slit 112 extending along the second axis 1120, the slot region 121 extending along the third axis 1210, the first slit 111 disposed on one side of the third axis 1210, such as the right side as shown in fig. 1A, and the second slit 112 disposed on the other side of the third axis 1210, such as the left side as shown in fig. 1A, the first slit 111, the second slit 112 being disposed adjacently spaced in a direction in which the third axis 1210 extends. The beneficial effects are that, the left side and the right side are alternately arranged, and can keep higher antenna efficiency. In addition, the inventors found that, although it is theoretically necessary for the distance between the back surface 131 of the protruding element and the third surface 21 to be less than one quarter wavelength (for millimeter waves, less than 1/4mm, i.e., 0.25mm is required), it is preferable that the detection angle, the radio frequency operation bandwidth, and the like be satisfied well when the back surface 131 of the protruding element 13 is set to be 0.040mm to 0.075mm from the third surface 21 due to the structure of the integrated slot gap waveguide employed in the embodiment. In a comparative example, the inventors tried to set the back surface 131 of the protruding element 13 to a distance of 0.010mm to 0.030mm from the third surface 21, and the effect was poor at this time, failing to meet the requirement.

With continued reference to fig. 1A-1C, in some embodiments, the number of slits may be a plurality of pairs of slits disposed in the first face 11, the pairs of slits being adjacently spaced along the third axis 1210. For example, the three-pair (six) slot structure shown in the figure, it can be understood that the number of slots depends on the requirements of a specific scene, such as the gain and the pitch beam width of the radar antenna, and if the antenna gain needs to be higher than that of the six-slot structure, the pitch beam width is narrower, and the number of slots can be correspondingly increased. Preferably, as shown in fig. 1A, for the multi-pair slot structure, the first slot 111 of the first pair of slots 1101 closest to the protruding element 13 in the third axis extending direction is a quarter wavelength away from the protruding element 13, so that the slot-slot gap is better matched, and the efficiency of the antenna is further improved. In addition, the first axes 1110 of the first slits 111 of the different pairs of slits may be non-collinear, as may the second axes 1210 of the second slits 112 of the different pairs of slits.

Preferably, in some embodiments, the first axis 1110, the second axis 1120, and the third axis 1210 are parallel; the first gap 111 is disposed on one side of the third axis 1210, the distance between the first gap 111 and the third axis 1210 is a first distance, the second gap 112 is disposed on the other side of the third axis 1210, 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, and by adopting an asymmetric structure, the waveguide transmission effect can be further optimized in the slot gap waveguide structure described in the above embodiment.

Preferably, for the structure of at least three pairs of slits, the first pair of slits 1101, the second pair of slits 1102 and the third pair of slits 1103 are respectively arranged adjacently 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 slit 1101 and the second slit 1103 and the third axis 1210, namely the distance between the first slit 111 and the third axis 1210 of the first slit 1101 and the second slit 1102 is larger than the distance between the first slit 111 and the third axis 1210 of the third pair of slits 1103; the distance between the second slits 112 of the first pair of slits 1101 and the second pair of slits 1102 and the third axis 1210 is greater than the distance between the second slits 112 of the third pair of slits 1103 and the third axis 1210. The last pair of structures with a shorter gap distance from the third axis may further optimize the waveguide transfer effect in the slot gap waveguide structure described in the above embodiments.

In order to more clearly describe the content of the present application, the following describes the technical solution of one or more embodiments of the present application in a specific example.

For the antenna device 10 shown in fig. 1A to 1C, there are three pairs (six) of slots 110.

In the extending direction of the third axis 1210, i.e., in the X direction, a distance between the first slit 111 of the first pair of slits 1101 and the second slit 112 of the first pair of slits 1101 is 2.679mm, a distance between the second slit 112 of the first pair of slits 1101 and the first slit 111 of the second pair of slits 1102 is 2.67mm, a distance between the first slit 111 of the second pair of slits 1102 and the second slit 112 of the second pair of slits 1102 is 2.6446mm, a distance between the second slit 112 of the second pair of slits 1102 and the first slit 111 of the third pair of slits 1103 is 2.519mm, and a distance between the first slit 111 of the third pair of slits 1103 and the second slit 112 of the third pair of slits 1103 is 2.243mm.

In the direction perpendicular to the third axis 1210 on the second face, i.e., in the Y direction, the distances between the respective slits and the third axis 1210 are respectively 0.234mm in the first slit 111 and the center distance of the first pair of slits 1101, 0.416mm in the second slit 112 and the center distance of the first pair of slits 1101, 0.235mm in the first slit 111 and the center distance of the second pair of slits 1102, 0.51mm in the second slit 112 and the center distance of the second pair of slits 1102, 0.166mm in the first slit 111 and the center distance of the third pair of slits 1103, and 0.355mm in the second slit 112 and the center distance of the third pair of slits 1103.

The distances in the Y direction between the respective slits and the protruding element 13 are respectively: the first slit 111 of the first pair of slits 1101 and the protruding member 13 (hereinafter referred to as a clinical staple) closest to each other in the Y direction are spaced apart by 1.3717mm, the second slit 112 of the first pair of slits 1101 and the clinical staple are spaced apart by 1.189mm, the first slit 111 of the second pair of slits 1102 and the clinical staple are spaced apart by 1.37mm, the second slit 112 of the second pair of slits 1102 and the clinical staple are spaced apart by 1.0953mm, the first slit 111 of the third pair of slits 1103 and the clinical staple are spaced apart by 1.439mm, and the second slit 112 of the third pair of slits 1103 and the clinical staple are spaced apart by 1.25mm.

The rear face 131 of the protruding element 13 is arranged at a distance of 0.060mm from the third face 21.

The antenna azimuth plane pattern, the antenna elevation plane pattern, and the S11 standing wave curve of the obtained antenna device are shown in fig. 2, 3, and 4, respectively. As shown in fig. 2, the azimuth plane direction diagram of the antenna at the 76GHz frequency point shows that the gain of the antenna at + -45 degrees is larger than 12dB, and the gain at + -75 degrees is larger than 8.5dB (8.7 dB), so that the requirement of the angle radar on large-angle detection is met. Specifically, taking radar of a vehicle as an example, the operating bandwidth thereof is 76GHz to 81GHz. According to the radar equation:

wherein Pt is a radar transmitting power signal, antenna transmitting and receiving gains are Gt and Gr, σ is RCS (scattering cross section area) of a target, λ is wavelength, nr is distance dimension sampling point number, nd is speed dimension sampling point number, K is boltzmann constant, B is receiver bandwidth (i.e. sampling bandwidth of ADC), T0 is standard room temperature (generally 290K is taken), fn is noise coefficient, SNRomin is signal-to-noise ratio threshold, and L is loss of the system. Therefore, the gain at + -75 degrees is 8.7dB, and the corresponding radar antenna detection distance can reach 75m, which is far greater than that of a conventional angle radar antenna by 75 degrees.

Referring to FIG. 3, the antenna depression side lobe level is lower than-19 dB, and the requirement that the radar antenna side lobe level design is lower than-15 dB is also met.

Referring to the antenna S11 standing wave curve shown in FIG. 4, it can be seen from this curve that the antenna-10 dB operating bandwidth is 75-80.8GHz, covering the operating bandwidth of the vehicle' S radar (76 GHz to 81 GHz).

It can be seen that the antenna device described above can satisfactorily meet the requirements of a transceiver device as a radar device for a vehicle. It is understood that the above values are merely specific examples, and do not limit the dimensional parameters to the above values, and the inventors have found that the above values can substantially achieve satisfactory results within a range of about ±30%. If this range is exceeded, it is likely that the requirement cannot be satisfied, for example, in a comparative example, the back surface 131 of the protruding element 13 is set to a distance of 0.010mm to 0.030mm from the third surface 21, and the requirement of the gain and/or the operating bandwidth described above cannot be satisfied although the basic requirement that the distance of the back surface 131 of the protruding element from the third surface 21 is required to be less than a quarter wavelength (based on the basic principle of gap waveguide) is also satisfied.

As described above, the present application further provides a method for assembling a radio frequency transceiver device 100, including:

the antenna device 10 described in the above embodiment is employed as the first mounting unit;

adopting a component having the printed circuit board 101 as a second mounting unit;

the first assembly unit is packaged to the second assembly unit, so that the third surface 21 is provided by the printed circuit board 101, and forms a slot gap waveguide propagating along the slot region 121 together with the second surface 12 and the protruding element 13.

In summary, the beneficial effects of adopting the antenna device, the radio frequency transceiver device, the vehicle and the assembly method include, but are not limited to, realizing the structure of the slot gap waveguide in the single-layer structure, namely forming the functions of the radiation layer and the back cavity layer introduced in the background art through the single-layer structure, so that the device does not need to adopt a stacked structure, the antenna device is compact in structure and easy to integrate on the basis of meeting the transmission requirement of millimeter waves, and the radio frequency transceiver device where the antenna device is located can be realized, for example, the structure of an automobile millimeter wave radar is compact, so that the antenna device and the radio frequency transceiver device are easy to be arranged in a narrow space, for example, the arrangement in the vehicle is easy, the assembly process is simpler, the yield is improved, and the assembly manufacturing cost is reduced. In addition, the waveguide cavity enclosed by the antenna structure and the nail bed structure is arranged on the same structural member, so that dimensional errors caused by installation and performance loss caused by the errors are avoided, the installation requirement is reduced, and the installation process is further simplified.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the application is to be controlled by the appended claims and is not to be limited to the specific constructions and components of the above-described embodiments. Various changes and modifications to the embodiments may be made by those skilled in the art within the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the present application.

Claims (10)

1. An antenna device (10), characterized by comprising:

a first layer (1), the first layer (1) comprising a first face (11) providing a surface, a second face (12) located on the back side of the first face (11);

the first face (11) is provided with a slit (110);

-said second face (12) is provided with a plurality of protruding elements (13), which protruding elements (13) enclose a defined slot region (121) at said second face (12), constituting an electromagnetic bandgap, the back faces (131) of which protruding elements being able to constitute magnetic conductors for cooperation with a third face (21) constituting an electrical conductor, forming a slot gap waveguide propagating along said slot region (121);

wherein the gap (110) is located within the groove region (121).

2. The antenna device (10) according to claim 1, wherein the slots comprise at least a pair of slots arranged at the first face (11), the pair of slots comprising at least a first slot (111) extending along a first axis (1110), a second slot (112) extending along a second axis (1120), the slot region (121) extending along a third axis (1210), the first slot (111) being arranged at one side of the third axis (1210), the second slot (112) being arranged at the other side of the third axis (1210), the first slot (111), the second slot (112) being arranged adjacently at intervals in the direction in which the third axis (1210) extends; the rear face (131) of the protruding element (13) is arranged at a distance of 0.040mm-0.075mm from the third face (21).

3. The antenna device (10) according to claim 2, characterized in that a plurality of pairs of slots are provided in said first face (11), said pairs of slots being adjacently spaced along said third axis (1210).

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

5. The antenna device (10) according to claim 2, wherein the slot extends for a half wavelength; -the first axis (1110), the second axis (1120), the third axis (1210) are parallel; the first gap (111) is arranged on one side of the third axis (1210), 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), 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.

6. The antenna device (10) according to any of claims 1-5, wherein at least three pairs of slits are provided in the first face (11), including a first pair of slits (1101), a second pair of slits (1102), a third pair of slits (1103) being provided adjacent to each other in the direction of the third axis (1210), wherein the distance between the first slit, the second slit of 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 device (100) comprising an antenna device (10) according to any one of claims 1-6.

8. The radio frequency transceiver device (100) of claim 7, wherein the radio frequency transceiver device (100) comprises a radar, the radio frequency transceiver device (10) comprising a printed circuit board (101), the printed circuit board (101) providing the third face (21).

9. A vehicle, characterized by comprising an antenna arrangement (10) as claimed in any one of claims 1-6.

10. A method of assembling a radio frequency transceiver device (100), comprising:

-using the antenna device (10) according to any of claims 1-6 as a first assembly unit;

-using a component with a printed circuit board (101) as a second assembly unit;

-packaging the first assembly unit to the second assembly unit such that the printed circuit board (101) provides the third face (21), forming with the second face (12) and the protruding element (13) a slot gap waveguide propagating along the slot region (121).