Substrate integrated waveguide antenna and antenna device

Abstract

An embodiment of the present invention provides a substrate-integrated waveguide antenna and antenna device. The substrate-integrated waveguide antenna includes a dielectric substrate and a metal patch attached to the dielectric substrate. The metal patch is provided with a slot, with metal vias provided on one or both sides of the slot. The metal vias and the slot are spaced apart, and both the slot and the metal vias extend through the metal patch. The slot has a first dimension in a first direction and a second dimension in a second direction. The first direction is a direction in which the direction of a line connecting the metal via and the slot is aligned, and the second direction is a direction perpendicular to the first direction. The first and second dimensions represent the slot dimensions required for the substrate-integrated waveguide antenna to achieve a preset radiation gain value. This increases the reflection of the substrate-integrated waveguide antenna, thereby improving the radiation gain of the substrate-integrated waveguide antenna.

Description

Technical Field

[0001] The present invention relates to the technical field of signal equipment, and in particular to an integrated waveguide slot antenna and an antenna device. Background Art

[0002] Traditional waveguide slot array antennas have gained widespread application due to their significant advantages, including compact structure, high gain, and easy realization of ultra-low sidelobe requirements. Substrate-integrated waveguides inherit the low loss and high quality factor of metal waveguides. Furthermore, they are small, lightweight, low-cost, and easy to integrate with other planar circuits. They also overcome the electromagnetic wave leakage issues of traditional planar transmission lines such as microstrip and coplanar waveguides, making them excellent waveguide structures with great application prospects.

[0003] However, the combination of the substrate integrated waveguide antenna matching vias and slots will affect the radiation intensity. How to control the size of the substrate integrated waveguide antenna matching vias and slots has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] Embodiments of the present invention provide a substrate integrated waveguide antenna and an antenna device to solve the problem of insufficient radiation gain of substrate integrated waveguide antennas in the prior art.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a substrate-integrated waveguide antenna, wherein the substrate-integrated waveguide antenna includes a dielectric substrate and a metal patch;

[0007] The metal patch is attached to the dielectric substrate;

[0008] A slit groove is formed on the metal patch, and a metal via hole is formed on one side or both sides of the slit groove, wherein the metal via hole and the slit groove are spaced apart, and the slit groove and the metal via hole both pass through the metal patch;

[0009] The size of the slot in the first direction is a first value, and the size of the slot in the second direction is a second value, wherein the first direction is the direction in which the directions of the lines connecting the metal vias and the slot are on the same straight line, and the second direction is a direction perpendicular to the first direction, and the first value and the second value are the sizes of the slot required for the substrate integrated waveguide antenna to reach a preset radiation gain value.

[0010] Optionally, the substrate integrated waveguide antenna further includes a phase shift unit;

[0011] The phase shift unit is arranged between any two of the slots. The phase shift unit is a through-slot structure. The phase shift unit passes through the metal patch and the dielectric substrate.

[0012] Optionally, the cross-section of the phase shift unit along the first direction is square;

[0013] The four corners of the cross section have rectangular notches, and the sizes of the rectangular notches at the four corners are the same, wherein the first direction is a direction parallel to the plane where the metal patch is located.

[0014] Optionally, the side length of the square cross-section is 5.20 mm, the length of the long side of the rectangular notch is 0.4 mm, and the length of the short side of the rectangular notch is 0.35 mm, wherein the long side of the rectangular notch is consistent with the long side of the metal patch, and the short side of the rectangular notch is consistent with the short side of the metal patch.

[0015] Optionally, the phase shifting unit is arranged near an end of the substrate integrated waveguide antenna.

[0016] Optionally, the distance between the metal via and the slit groove is a third value, and the third value is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0017] Optionally, the distance between the metal via and the slot is 3.5 mm.

[0018] Optionally, the first value is 1.2 mm and the second value is 6.7 mm.

[0019] Optionally, when a plurality of metal vias are provided on one side or both sides of the slot, the spacing between every two adjacent metal vias on the same side is equal.

[0020] Optionally, an angle is formed between an extension direction of the slit groove and a straight line on which an edge of the metal patch is located.

[0021] In a second aspect, an embodiment of the present invention further provides an antenna device, comprising a plurality of substrate integrated waveguide antennas as described in any embodiment of the first aspect;

[0022] A plurality of substrate integrated waveguide antennas are arranged in parallel.

[0023] In an embodiment of the present invention, a slot is provided on the metal patch, and metal vias are provided on one or both sides of the slot, the metal vias and the slot are spaced apart, and both the slot and the metal vias pass through the metal patch. Therefore, on the one hand, by providing metal vias on one or both sides of the slot, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, thereby improving the radiation gain of the substrate integrated waveguide antenna. On the other hand, by optimizing the dimensions of the slot in the first direction and the second direction, the dimensions of the slot required when the slot reaches a preset radiation gain value can be achieved, thereby also improving the radiation gain of the substrate integrated waveguide antenna. In summary, in an embodiment of the present invention, by providing metal vias on one or both sides of the slot and optimizing the dimensions of the slot, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, thereby improving the radiation gain of the substrate integrated waveguide antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of a substrate integrated waveguide antenna provided by an embodiment of the present invention is shown;

[0026] Figure 2 A schematic structural diagram of another substrate integrated waveguide antenna provided by an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram showing the structure of a metal patch provided by an embodiment of the present invention;

[0028] Figure 4 A partial enlarged schematic diagram of a metal patch at position A provided by an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram showing the positions of the slits and metal through-holes provided on the metal patch according to an embodiment of the present invention;

[0030] Figure 6 A schematic diagram showing the size and structure of a metal patch provided in an embodiment of the present invention;

[0031] Figure 7 A schematic structural diagram showing a first type of slit groove provided on a metal patch according to an embodiment of the present invention;

[0032] Figure 8 A schematic diagram showing the structure of a second type of slit groove provided on a metal patch according to an embodiment of the present invention;

[0033] Figure 9 A schematic diagram showing the structure of a third type of slit groove provided on a metal patch according to an embodiment of the present invention;

[0034] Figure 10 A schematic diagram showing the structure of a fourth type of slit groove provided on a metal patch according to an embodiment of the present invention;

[0035] Figure 11 A schematic structural diagram of an antenna device provided by an embodiment of the present invention is shown.

[0036] Reference numerals:

[0037] 1: substrate integrated waveguide antenna; 11: dielectric substrate; 12: metal patch; 121: slot; 122: metal via; 123: phase shifter. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0040] In a first aspect, an embodiment of the present invention provides a substrate integrated waveguide antenna. Figure 1 FIG2 is a schematic structural diagram of a substrate integrated waveguide antenna provided by an embodiment of the present invention. Figure 2 A schematic structural diagram of another substrate integrated waveguide antenna provided by an embodiment of the present invention is shown. Figure 3 A schematic diagram showing the structure of the metal patch provided by an embodiment of the present invention is shown in FIG. Figure 1 、 Figure 2 and Figure 3As shown, the substrate integrated waveguide antenna includes a dielectric substrate 1 and a metal patch 2; the metal patch 2 is attached to the dielectric substrate 1; a slot groove 121 is formed on the metal patch 2, and a metal via 122 is formed on one side or both sides of the slot groove 121. The metal via 122 and the slot groove 121 are spaced apart, and both the slot groove 121 and the metal via 122 pass through the metal patch 2; the size of the slot groove 121 in a first direction is a first value, and the size of the slot groove 121 in a second direction is a second value, wherein the first direction is a direction in which the directions of the line connecting the metal via 122 and the slot groove 121 are on the same straight line, and the second direction is a direction perpendicular to the first direction. The first value and the second value are the sizes of the slot groove 121 required for the substrate integrated waveguide antenna to achieve a preset radiation gain value.

[0041] The dielectric substrate 1 is the base portion of the substrate-integrated waveguide antenna, typically a glass substrate or a microstrip substrate. The metal patch 2 is the main portion of the substrate-integrated waveguide antenna for transmitting and receiving signals. In the embodiment of the present invention, the dielectric substrate 1 is a glass substrate, and the metal patch 2 is a copper patch. Specifically, in one possible implementation, the glass substrate is a sheet-like structure, and the copper patch can be attached to the upper surface of the glass substrate, or to both the upper and lower surfaces of the glass substrate. The upper and lower surfaces of the glass substrate are two opposing surfaces of the glass substrate, and the embodiment of the present invention does not limit this. In the case where the copper patches are attached to both the upper surface of the glass substrate, since the upper and lower surfaces are two essentially opposing surfaces of the glass, if the copper patches attached to the upper surface and the copper patches attached to the lower surface are both provided with slots 121, a single substrate-integrated waveguide antenna can achieve 360° signal coverage. In another possible implementation, the glass substrate is a rectangular parallelepiped substrate with a certain thickness, and the metal patches 2 can be attached to any three surfaces of the glass substrate to ensure signal coverage in different directions.

[0042] In an embodiment of the present invention, to increase the radiation of the substrate-integrated waveguide antenna, a slot 121 is provided on the metal patch 2. Metal vias 122 are provided on one or both sides of the slot 121. The metal vias 122 and the slot 121 are spaced apart, and both the slot 121 and the metal vias 122 extend through the metal patch 2. Adding metal vias 122 on one or both sides of the slot 121 can change the port reflection parameter and radiation effect of the substrate-integrated waveguide antenna. Specifically, without changing the size of the slot 121, adding a via on one side of the slot 121 can increase the port reflection parameter of the substrate-integrated waveguide antenna to -13.42 dB, thereby increasing the reflection of the substrate-integrated waveguide antenna and achieving a radiation gain of 5.14 dB. It should be noted that in an embodiment of the present invention, a metal via 122 can be added on one side of the slot 121, or on both sides of the slot 121. The number of metal vias 122 added on one side of the slot 121 can be one or more, and the embodiment of the present invention does not limit this.

[0043] In addition, by changing the size of the slot 121, the radiation gain of the integrated waveguide antenna can be improved by optimizing the size of the slot 121. Figure 6 As shown, the dimension of the slot 121 in the first direction is the dimension of the slot 121 in the x-direction, and the dimension of the slot 121 in the second direction is the dimension of the slot 121 in the y-direction. In one possible implementation, the first value is 1.2 mm and the second value is 6.7 mm, i.e., the dimension of the slot 121 in the x-direction is 1.2 mm and the dimension in the y-direction is 6.7 mm. In this case, the port reflection parameter of the substrate-integrated waveguide antenna can reach -16.95 dB, and the radiation gain of the substrate-integrated waveguide antenna can reach 3.24 dB.

[0044] It can be seen from the above embodiments that in the embodiments of the present invention, since a slot groove 121 is provided on the metal patch 2, a metal via 122 is provided on one side or both sides of the slot groove 121, and the metal via 122 and the slot groove 121 are spaced apart, and both the slot groove 121 and the metal via 122 pass through the metal patch 2, on the one hand, by providing the metal via 122 on one side or both sides of the slot groove 121, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, and improving the radiation gain of the substrate integrated waveguide antenna. On the other hand, by optimizing the dimensions of the slot groove 121 in the first direction and the second direction, the dimensions of the slot groove 121 required to achieve a preset radiation gain value of the slot groove 121 can be achieved, thereby also improving the radiation gain of the substrate integrated waveguide antenna. In summary, in an embodiment of the present invention, by opening a metal through hole on one side or both sides of the slot groove 121 and optimizing the size of the slot groove 121, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, and improving the radiation gain of the substrate integrated waveguide antenna.

[0045] In some embodiments, the radiation gain of the substrate integrated waveguide antenna can be changed by optimizing the position and shape of the slot, or by changing the alignment between the metal via 122 and the slot 121, or by adding a phase shifter 123, as follows:

[0046] In the case of changing the radiation gain of the substrate integrated waveguide antenna by adding the phase shift unit 123, specifically, as shown in FIG. Figure 3 As shown, the substrate integrated waveguide antenna further includes a phase shift unit 123 ; the phase shift unit 123 is disposed between any two slots 121 , and the phase shift unit 123 is a through-slot structure, and the phase shift unit 123 passes through the metal patch 2 and the dielectric substrate 1 .

[0047] It should be noted that by adding phase delay to the metal substrate, such as Figure 6 As shown, the waveguide array can be manipulated within the metal substrate, as shown in the yz plane (e-plane) in the figure. Phase delay can also be varied by changing the line length. Different frequencies will produce different phase delays, allowing scanning to be performed simply by changing the frequency. Based on this, since the phase shifter 123 is a through-slot structure, it can be equivalent to a metal via 122, thereby reducing interference with the substrate-integrated waveguide radiation signal and reducing radiation signal attenuation, thereby improving the radiation gain of the substrate-integrated waveguide antenna.

[0048] Optional, such as Figure 4As shown, the cross section of the phase shift unit 123 along the first direction is square; there are rectangular notches at the four corners of the cross section, and the sizes of the rectangular notches at the four corners are the same, wherein the first direction is the direction parallel to the plane where the metal patch 2 is located.

[0049] It should be noted that since the cross-section of the phase shifting unit 123 along the first direction is square, there are rectangular notches at the four corners of the cross-section, and the sizes of the rectangular notches at the four corners are the same, a phase shift angle of a certain degree can be formed through the through-slot structure where the rectangular notches are located, thereby increasing the signal radiation area of the substrate integrated waveguide antenna.

[0050] Optional, such as Figure 4 As shown, the side length of the square cross-section is 5.20 mm, the length of the long side of the rectangular notch is 0.4 mm, and the length of the short side of the rectangular notch is 0.35 mm, wherein the long side of the rectangular notch is consistent with the long side of the metal patch 2, and the short side of the rectangular notch is consistent with the short side of the metal patch 2.

[0051] It should be noted that, since the side length of the square section is 5.20 mm, the length of the long side of the rectangular notch is 0.4 mm, and the length of the short side of the rectangular notch is 0.35 mm, it is possible to form Figure 4 The through-slot structure with a cross-section of L1 = 4.80 mm, L2 = 5.20 mm, and W1 = 0.35 mm can obtain a 360° phase shift angle, further increasing the signal radiation area of the substrate integrated waveguide antenna and improving the radiation gain of the integrated waveguide antenna.

[0052] Optionally, the phase shift unit 123 is provided at a position close to the end of the substrate integrated waveguide antenna.

[0053] It should be noted that, when the phase shift unit 123 is arranged near the end of the substrate integrated waveguide antenna, the signal of the substrate integrated waveguide antenna can be phase shifted to the greatest extent, thereby achieving the effect of changing the phase delay.

[0054] In addition, it should be noted that when the substrate integrated waveguide antenna is arrayed with the phase shift unit 123, the amplitude and phase of the substrate integrated waveguide antenna can be modulated. By using a resonant waveguide slot array antenna, the center spacing of each slot slot 121 is λ / 2, which can further improve the radiation gain of the substrate integrated waveguide antenna.

[0055] When the radiation gain of the substrate integrated waveguide antenna is changed by changing the alignment relationship between the metal via 122 and the slot 121, the distance between the metal via 122 and the slot 121 can be made to be a third value, which is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0056] It should be noted that, through the simulation of the substrate integrated waveguide antenna port parameters, such as Figure 5 As shown, when the distance between the metal via 122 and the slot 121 is greater than or equal to 0.5 mm and less than or equal to 5 mm, the reflection parameter of the substrate integrated waveguide antenna can be improved and the loss parameter of the substrate integrated waveguide antenna can be reduced. That is, when the distance between the metal via 122 and the slot 121 is a third value, the reflection amount of the substrate integrated waveguide antenna can be increased and the loss amount of the substrate integrated waveguide antenna can be reduced, thereby improving the radiation gain of the substrate integrated waveguide antenna. Figure 5 The dimensions shown in d.

[0057] Optionally, the distance between the metal via 122 and the slot 121 is 3.5 mm.

[0058] It should be noted that when the distance between the metal via 122 and the slot 121 is 3.5 mm, the reflection parameter of the substrate integrated waveguide antenna can reach -12.42 dB, and the loss parameter of the substrate integrated waveguide antenna can reach -2.4 dB, thereby maximizing the radiation gain of the substrate integrated waveguide antenna.

[0059] In addition, when multiple metal vias 122 are provided on one or both sides of the slot 121, the spacing between each two adjacent metal vias 122 on the same side is equal. This increases the radiation gain of the integrated waveguide antenna formed by each metal via 122 by multiples, thereby preventing the two metal vias 122 from interfering with each other.

[0060] When the radiation gain of the substrate integrated waveguide antenna is changed by optimizing the position and shape of the slot, an angle is formed between the extension direction of the slot groove 121 and the straight line where the edge of the metal patch 2 is located.

[0061] It should be noted that if Figure 6 As shown, the transverse slit groove 121 (as shown Figure 7 ) corresponds to a narrow beam width on the xz plane (h plane) and a wide beam width on the yz plane (e plane). Figure 4 ) corresponds to a narrow beamwidth in the xz plane (h-plane) and a wide beamwidth in the yz plane (e-plane). This is directly related to the physical size of the slot. For a transverse slot, the physical size along the e-plane is shorter than the physical size along the h-plane, so the corresponding beamwidth is wide. In this case, the z component of the current will not be disturbed because the slot is very thin and the z current does not need to propagate around the slot. Therefore, the x component of the current will cause radiation and propagate around the slot. Based on this, Figure 7 、 Figure 8 and Figure 9 As shown, an angle can be formed between the extension direction of the slot 121 and the straight line where the edge of the metal patch 2 is located, that is, the extension direction of the slot 121 is rotated by an angle around the central axis direction of the slot 121, so that the slot 121 will interfere with the Z component of the current density, so that the slot 121 also generates signal radiation, thereby improving the radiation gain of the substrate integrated waveguide antenna.

[0062] It can be seen from the above embodiments that in the embodiments of the present invention, since a slot groove 121 is provided on the metal patch 2, a metal via 122 is provided on one side or both sides of the slot groove 121, and the metal via 122 and the slot groove 121 are spaced apart, and both the slot groove 121 and the metal via 122 pass through the metal patch 2, on the one hand, by providing the metal via 122 on one side or both sides of the slot groove 121, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, and improving the radiation gain of the substrate integrated waveguide antenna. On the other hand, by optimizing the dimensions of the slot groove 121 in the first direction and the second direction, the dimensions of the slot groove 121 required to achieve a preset radiation gain value of the slot groove 121 can be achieved, thereby also improving the radiation gain of the substrate integrated waveguide antenna. In summary, in an embodiment of the present invention, by opening a metal through hole on one side or both sides of the slot groove 121 and optimizing the size of the slot groove 121, the port reflection parameter of the substrate integrated waveguide antenna can be increased, thereby increasing the reflection amount of the substrate integrated waveguide antenna, and improving the radiation gain of the substrate integrated waveguide antenna.

[0063] In addition, the radiation gain of the substrate integrated waveguide antenna can be changed by optimizing the position of the slot, optimizing the shape of the slot, changing the alignment relationship between the metal via 122 and the slot groove 121, or by adding a phase shifter 123, thereby increasing the reflection amount of the substrate integrated waveguide antenna and reducing the loss of the substrate integrated waveguide antenna, thereby achieving the effect of improving the radiation gain of the integrated waveguide antenna.

[0064] In addition, if Figure 11As shown, an embodiment of the present invention further provides an antenna device, comprising a plurality of substrate integrated waveguide antennas 1 as described in any of the above embodiments, wherein the plurality of substrate integrated waveguide antennas 1 are arranged in parallel. It should be noted that, due to the relatively long size of each substrate integrated waveguide antenna 1, the beam corresponding to each substrate integrated waveguide antenna 1 is relatively narrow. The narrow beam situation can be improved by arranging each substrate integrated waveguide antenna 1 in parallel in the form of an array. Based on this, by arranging the plurality of substrate integrated waveguide antennas 1 in parallel, the beam width in the E plane can be greatly reduced, thereby improving the radiation gain of the antenna device. In addition, the terminal of the antenna device can be short-circuited and the matching load can be increased to absorb the electromagnetic waves at the endpoint and prevent the energy from returning to form an echo reflection. This can maintain the characteristics of wide-band and high gain to a certain extent, forming a standing wave array, which is also beneficial to improving the radiation gain of the antenna device.

[0065] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0066] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0067] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity from another, and do not necessarily require or imply any actual relationship or order between these entities. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the article or terminal device comprising the element.

[0068] The technical solutions provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. At the same time, for those skilled in the art, according to the principles and implementation methods of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A substrate integrated waveguide antenna, characterized in that: The substrate integrated waveguide antenna includes a dielectric substrate and a metal patch; The metal patch is attached to the dielectric substrate; A slit groove is formed on the metal patch, and a metal via hole is formed on one side or both sides of the slit groove, wherein the metal via hole and the slit groove are spaced apart, and the slit groove and the metal via hole both pass through the metal patch; The size of the slot in the first direction is a first value, and the size of the slot in the second direction is a second value, wherein the first direction is a direction in which the direction of the line connecting the metal via and the slot is on the same straight line, and the second direction is a direction perpendicular to the first direction, and the first value and the second value are the sizes of the slot required for the substrate integrated waveguide antenna to achieve a preset radiation gain value; The substrate integrated waveguide antenna further includes a phase shift unit; The phase shift unit is arranged between any two of the slots, the phase shift unit is a through slot structure, and the phase shift unit passes through the metal patch and the dielectric substrate; The cross section of the phase shift unit along the first direction is square; The four corners of the cross section have rectangular notches, and the sizes of the rectangular notches at the four corners are the same, wherein the first direction is a direction parallel to the plane where the metal patch is located.

2. The substrate integrated waveguide antenna according to claim 1, wherein: The side length of the square cross-section is 5.20 mm, the length of the long side of the rectangular notch is 0.4 mm, and the length of the short side of the rectangular notch is 0.35 mm, wherein the long side of the rectangular notch is consistent with the long side of the metal patch, and the short side of the rectangular notch is consistent with the short side of the metal patch.

3. The substrate integrated waveguide antenna according to claim 2, wherein: The phase shift unit is arranged at a position close to the end of the substrate integrated waveguide antenna.

4. The substrate integrated waveguide antenna according to claim 1, wherein: The distance between the metal via and the slot is a third value, which is greater than or equal to 0.5 mm and less than or equal to 5 mm.

5. The substrate integrated waveguide antenna according to claim 4, characterized in that: The distance between the metal via and the slot is 3.5 mm.

6. The substrate integrated waveguide antenna according to claim 1, wherein: The first value is 1.2 mm, and the second value is 6.7 mm.

7. The substrate integrated waveguide antenna according to claim 1, wherein: In the case where a plurality of metal vias are provided on one side or both sides of the slot, the spacing between every two adjacent metal vias on the same side is equal.

8. The substrate integrated waveguide antenna according to claim 1, wherein: An angle is formed between the extending direction of the slot and the straight line where the edge of the metal patch is located.

9. An antenna device, characterized in that: The antenna device comprises a plurality of substrate integrated waveguide antennas according to any one of claims 1 to 8; A plurality of substrate integrated waveguide antennas are arranged in parallel.

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