Onboard antenna and gateway device

Abstract

The utility model provides an onboard antenna and gateway equipment, and relates to the technical field of antenna equipment, the onboard antenna comprises a circuit board, the circuit board comprises a first surface and a second surface which are oppositely arranged in a first direction, and the first surface of the circuit board is provided with a metal ground layer; the antenna body is arranged on the first surface, and a coupling seam is formed between the antenna body and the metal ground layer; the coupling sheet is arranged on the second surface, and the coupling sheet and the coupling slot are oppositely arranged; the antenna body couples the current to the metal ground layer through the coupling slot and also couples the current to the coupling sheet, and the coupling sheet couples the current on the coupling sheet to the metal ground layer through the coupling slot. According to the onboard antenna provided by the invention, the current at the coupling slot is enhanced, so that when the onboard antenna needs signal radiation with relatively low resonant frequency, the length of the antenna body does not need to be increased, the volume of the gateway equipment is not increased, the miniaturization design of the gateway equipment is facilitated, and the practicability of the gateway equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of antenna equipment, and in particular to a board-mounted antenna and a gateway device. Background Art

[0002] In a board-mounted antenna, the length of the antenna is negatively correlated with the signal resonance frequency of the antenna. For example, the lower the signal resonance frequency of the antenna, the longer the required antenna length is.

[0003] Onboard antennas can be used in gateway devices, which require them to be as small as possible in actual use and the signal resonance frequency of the gateway device must meet certain requirements. When the onboard antenna needs to transmit a lower frequency signal, a longer antenna length is required, which increases the size of the onboard antenna, is not conducive to the miniaturization design of the gateway device, and affects the practicality of the gateway device. Utility Model Content

[0004] The embodiments of the present application provide an onboard antenna and a gateway device, which are used to solve the technical problem that when the onboard antenna needs to transmit a lower frequency signal, a longer antenna length is required, which leads to an increase in the volume of the onboard antenna, is not conducive to the miniaturized design of the gateway device, and affects the practicality of the gateway device.

[0005] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides an onboard antenna, comprising:

[0007] A circuit board, comprising a first surface and a second surface arranged opposite to each other in a first direction, wherein a metal ground layer is arranged on the first surface of the circuit board;

[0008] An antenna body, the antenna body being arranged on the first surface, and a coupling gap being provided between the antenna body and the metal layer;

[0009] A coupling sheet, the coupling sheet is arranged on the second surface, and the coupling sheet is arranged opposite to the coupling slit;

[0010] The antenna body couples current to the metal ground layer through a coupling slot, and the antenna body also couples current to the coupling plate, and the coupling plate is used to couple the current on the coupling plate to the metal ground layer through the coupling slot.

[0011] Based on the above technical solution, the present application can also be improved as follows.

[0012] In a possible implementation, the coupling gap includes:

[0013] a first slit, the first slit extending along a second direction, the second direction being perpendicular to the first direction;

[0014] a second slot, the second slot being away from the feeding point of the antenna body relative to the first slot, one end of the first slot away from the feeding point being connected to the second slot, the second slot being coplanar with the first slot, and the second slot extending along a third direction, the third direction intersecting with the second direction;

[0015] In the first direction, the projection of the second slit falls within the projection of the coupling plate;

[0016] And / or, the feeding point is located in the first gap, and the feeding point is spaced apart from the metal layer.

[0017] In a possible implementation manner, the antenna body further includes:

[0018] A radiation unit, one end of which is electrically connected to the feeding point; the first gap and the second gap are provided between the radiation unit and the metal layer;

[0019] A grounding point, wherein the grounding point is arranged on a side of the feeding point facing away from the radiation unit, and the grounding point is electrically connected to the metal ground layer.

[0020] In a possible implementation, the radiation unit includes:

[0021] a first radiating structure, wherein one end of the first radiating structure along the second direction is connected to the feeding point, the first radiating structure and the metal stratum are arranged at intervals along the third direction, and the interval between the first radiating structure and the metal stratum is the first gap;

[0022] a second radiation structure, wherein the second radiation structure is connected to the other end of the first radiation structure along the second direction, the second radiation structure and the metal stratum are arranged at intervals along the second direction, and the interval between the second radiation structure and the metal stratum is the second gap;

[0023] The sum of the widths of the first radiation structure, the first gap and the metal layer along the third direction is equal to the width of the second radiation structure along the third direction.

[0024] In a possible implementation manner, the coupling sheet extends along the second direction;

[0025] In the first direction, a first overlapping area exists between the projection of the coupling plate and the projection of the metal layer, and a second overlapping area exists between the projection of the coupling plate and the projection of the second radiation structure;

[0026] In the second direction, a length of the first overlapping area is smaller than a length of the second overlapping area.

[0027] In a possible implementation manner, in the second direction, the length of the first overlapping area is one quarter of the total length of the coupling plate;

[0028] In the second direction, the length of the second overlapping area is three quarters of the total length of the coupling plate.

[0029] In a possible implementation manner, the length of the metal layer along the second direction is one quarter of λ, where λ is the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit.

[0030] In a possible implementation manner, the length of the radiation unit along the second direction is one eighth of λ, where λ is the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit.

[0031] In one possible implementation, the circuit board has a metal layer, the metal layer is provided with the coupling slit, one end of the coupling slit is closed, and the other end of the coupling slit extends to the outer edge of the metal layer, and the coupling slit separates the metal layer into a first part for forming the metal ground layer and a second part for forming the radiation unit.

[0032] A second aspect of an embodiment of the present application provides a gateway device, which includes a main body, and an onboard antenna as described above, which is arranged on the main body.

[0033] The embodiment of the present application provides an on-board antenna and a gateway device. The on-board antenna arranges an antenna body on the first surface of a circuit board, couples the antenna body to a metal stratum through a coupling slot, and arranges a coupling plate at a position corresponding to the coupling slot on the second surface of the circuit board, so that the antenna body can couple to the metal stratum while also coupling current to the coupling plate. The current on the coupling plate can also be coupled to the metal stratum through the coupling slot. When the length of the antenna body remains unchanged, the current at the coupling slot is enhanced. Therefore, when the on-board antenna needs to radiate a signal with a lower resonant frequency, there is no need to increase the length of the antenna body, and the volume of the gateway device will not increase, which is conducive to the miniaturized design of the gateway device and improves the practicality of the gateway device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the structure of the onboard antenna from a first perspective provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of the onboard antenna from a second perspective provided in an embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of a third perspective of an onboard antenna provided in an embodiment of the present application;

[0038] Figure 4 A current distribution diagram when the onboard antenna provided in an embodiment of the present application is not provided with a coupling sheet;

[0039] Figure 5 A current distribution diagram when a coupling sheet is provided for the onboard antenna provided in an embodiment of the present application;

[0040] Figure 6 A resonant frequency diagram of a signal radiated when the onboard antenna provided in an embodiment of the present application is not provided with a coupling plate;

[0041] Figure 7 A resonant frequency graph of a signal radiated when a coupling sheet is provided for the onboard antenna provided in an embodiment of the present application;

[0042] Figure 8 for Figure 1 Schematic diagram of the structure when the on-board antenna is removed from the circuit board.

[0043] Description of reference numerals:

[0044] 100-circuit board;

[0045] 110-first surface; 120-second surface; 130-metal layer;

[0046] 200-antenna body;

[0047] 210-feeding point; 220-radiating unit; 230-grounding point;

[0048] 221-first radiation structure; 222-second radiation structure;

[0049] 300-Metallic formation;

[0050] 400-coupling seam;

[0051] 410-first gap; 420-second gap;

[0052] 500-coupling sheet;

[0053] 510 - first overlapping area; 520 - second overlapping area. DETAILED DESCRIPTION

[0054] As described in the background technology, when the onboard antenna needs to transmit a lower frequency signal, a longer antenna length is required, which increases the volume of the onboard antenna, is not conducive to the miniaturization design of the gateway device, and affects the practicality of the gateway device. The reason for this problem is that the length of the antenna is determined by the wavelength of the center operating frequency of the antenna. The wavelength and frequency are inversely related. The calculation formula is: wavelength (unit: meter) = 300 / frequency (unit: MHz). For example, when the center frequency is 150MHz, the wavelength is 2 meters. Therefore, when the onboard antenna needs to radiate a lower frequency signal, the length of the onboard antenna needs to be increased.

[0055] In response to the above technical problems, an embodiment of the present application provides an on-board antenna and a gateway device. The on-board antenna arranges an antenna body on the first surface of the circuit board, so that the antenna body is coupled to the metal stratum through a coupling slot, and a coupling plate is arranged on the second surface of the circuit board at a position corresponding to the coupling slot, so that the antenna body can couple the current to the coupling plate while coupling with the metal stratum. The current on the coupling plate can also be coupled to the metal stratum through the coupling slot. When the length of the antenna body remains unchanged, the current at the coupling slot is enhanced. Therefore, when the on-board antenna needs to radiate a signal with a lower resonant frequency, there is no need to increase the length of the antenna body, nor will it lead to an increase in the volume of the gateway device, which is conducive to the miniaturized design of the gateway device and improves the practicality of the gateway device.

[0056] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0057] refer to Figure 1 , Figure 2 and Figure 3 An embodiment of the present application provides a board-mounted antenna, which may include a circuit board 100, an antenna body 200 and a coupling plate 500.

[0058] refer to Figure 3The circuit board 100 may include Figure 3 The first surface 110 and the second surface 120 are arranged opposite to each other (as shown by the arrow X in the middle), and the first surface 110 of the circuit board 100 is provided with a metal layer 300.

[0059] refer to Figure 3 In some embodiments, the first direction may be the thickness direction of the circuit board 100. Figure 3 In the orientation, the first surface 110 may be the upper surface of the circuit board 100 , and the second surface 120 may be the lower surface of the circuit board 100 .

[0060] In a possible implementation, the metal layer 300 may be formed by etching the conductive metal layer 130 on the circuit board 100 .

[0061] refer to Figure 1 The antenna body 200 can be electrically connected to the control unit so that the control unit sends a signal to the antenna body 200. The antenna body 200 can also be disposed on the first surface 110 of the circuit board 100, the antenna body 200 and the metal layer 300 are on the same surface, and a coupling slot 400 is provided between the antenna body 200 and the metal layer 300, so that the antenna body 200 can couple the current on the antenna body 200 to the metal layer 300 through the coupling slot 400.

[0062] In a possible implementation, the antenna body 200 may also be formed by etching a copper layer on the circuit board 100 .

[0063] Referring to 2, the coupling plate 500 is disposed on the second surface 120 of the circuit board 100 facing away from the first surface 110, and the coupling plate 500 is disposed opposite to the coupling slot 400. The coupling plate 500 is coupled to the antenna body 200, and the current on the antenna body 200 can be coupled to the coupling plate 500. The current on the coupling plate 500 can be coupled to the metal layer 300 through the coupling slot 400, so that both the antenna body 200 and the coupling plate 500 can couple current to the metal layer 300 through the coupling slot 400.

[0064] In a specific implementation, the antenna body 200 receives a signal sent by a control unit, and the antenna body 200 couples the current to the metal layer 300 through the coupling slot 400. At the same time, the antenna body 200 also couples the signal to the coupling plate 500 in the form of current, and the coupling plate 500 is used to couple the current on the coupling plate 500 to the metal layer 300 through the coupling slot 400.

[0065] The embodiment of the present application provides an onboard antenna and a gateway device. The onboard antenna is configured by arranging an antenna body 200 on the first surface 110 of a circuit board 100, coupling the antenna body 200 with a metal layer 300 through a coupling slot 400, and arranging a coupling plate 500 at a position corresponding to the coupling slot 400 on the second surface 120 of the circuit board 100, so that the antenna body 200 is coupled with the metal layer 300 while coupling current to the coupling plate 500. The current on the coupling plate 500 can also be coupled to the metal layer 300 through the coupling slot 400. When the length of the antenna body 200 remains unchanged, the current at the coupling slot 400 is enhanced. Therefore, when the onboard antenna needs to radiate a signal with a lower resonant frequency, there is no need to increase the length of the antenna body 200, and the volume of the gateway device will not increase, which is conducive to the miniaturized design of the gateway device and improves the practicality of the gateway device.

[0066] refer to Figure 4 and Figure 5 , Figure 4 FIG. 4 schematically shows the current distribution at the coupling slot 400 when the coupling sheet 500 is not provided. Figure 5 FIG. 5 schematically shows the current distribution at the coupling slot 400 when the coupling sheet 500 is arranged at a position corresponding to the coupling slot 400 .

[0067] By comparison Figure 4 and Figure 5 The same area near the coupling gap 400 (such as Figure 4 and Figure 5 It can be seen from the current distribution at the coupling gap 400 (as shown in the area in the box in FIG), when the coupling plate 500 is set in the area corresponding to the coupling gap 400, the current distribution density at the coupling gap 400 is significantly increased, which means that when the coupling plate 500 is set at the position corresponding to the coupling gap 400 on the second side 120 of the circuit board 100, the intensity of the coupling current at the coupling gap 400 can be increased.

[0068] refer to Figure 6 and Figure 7 , Figure 6 It schematically shows that when the coupling plate 500 is not provided, the resonant frequency of the signal radiated by the onboard antenna is 0.65 Hz. Figure 7 It schematically shows that when the coupling plate 500 is provided, under the same length of the antenna body 200, the resonant frequency of the signal radiated by the onboard antenna is 0.47 Hz.

[0069] Depend on Figure 6 and Figure 7It can be seen that when the length of the antenna body 200 remains unchanged, the onboard antenna can radiate a signal with a lower resonance frequency by providing the coupling plate 500. It can be seen that when the onboard antenna radiates a signal with the same resonance frequency, the length of the antenna body 200 can be shorter.

[0070] refer to Figure 1 In some embodiments, the circuit board 100 has a conductive metal layer 130, a coupling slit 400 is provided on the metal layer 130, one end of the coupling slit 400 is closed, and the other end of the coupling slit 400 extends to the outer edge of the metal layer 130, and the coupling slit 400 separates the metal layer 130 into a first part for forming the metal ground layer 300 and a second part for forming the radiation unit 220. In some embodiments, the metal layer 130 on the circuit board 100 may be a metal copper layer.

[0071] refer to Figure 1 In some embodiments, the antenna body 200 may include a feeding point 210 , and the coupling slot 400 may include a first slot 410 and a second slot 420 .

[0072] The first slit 410 can be formed along the second direction (eg Figure 1 The second direction is perpendicular to the first direction, and the second direction may be the length extension direction of the circuit board 100. Both the antenna body 200 and the metal layer 300 may extend along the second direction. The antenna body 200 may couple current to the metal layer 300 through the first slot 410.

[0073] The second slot 420 is arranged relative to the first slot 410 and away from the feeding point 210 of the antenna body 200. One end of the first slot 410 away from the feeding point 210 is connected to the second slot 420, and the second slot 420 is coplanar with the first slot 410. The second slot 420 is arranged along the third direction (such as Figure 1 The third direction extends as shown by the arrow Z in the middle, and the third direction intersects with the second direction.

[0074] In some embodiments, the third direction and the second direction can be perpendicular to each other. If the second direction is the length direction of the circuit board 100, the third direction can be the width direction of the circuit board 100. For example, when the first slit 410 can extend along the length direction of the circuit board 100, the second slit 420 can extend along the width direction of the circuit board 100.

[0075] In the first direction, the projections of the first slot 410 and the second slot 420 both fall within the projection of the circuit board 100, and in the first direction, the projection of the second slot 420 falls within the projection of the coupling plate 500, so that the coupling plate 500 is arranged opposite to the second slot 420. By making the projection of the second slot 420 fall within the projection of the coupling plate 500 in the first direction, the current on the coupling plate 500 can be coupled to the metal ground layer 300 through the second slot 420, so that the intensity of the coupling current at the second slot 420 can be enhanced, thereby achieving the radiation of the signal with a lower resonant frequency while keeping the length of the antenna body 200 unchanged.

[0076] By making the projection of the second slot 420 away from the feeding point 210 fall within the projection of the coupling plate 500 in the first direction to enhance the coupling current at the second slot 420, the mutual influence between the feeding point 210 and the coupling plate 500 can be avoided, and the enhancement effect of the coupling plate 500 on the coupling current at the second slot 420 is improved.

[0077] refer to Figure 1 In some embodiments, the feeding point 210 is located in the first gap 410, and the feeding point 210 is spaced apart from the metal layer 300. By setting the feeding point 210 in the first gap 410 and spacing the feeding point 210 apart from the metal layer 300, the antenna body 200 can be electrically connected to the control unit through the feeding point 210, so that the control unit can send a signal to the antenna body 200 through the feeding point 210.

[0078] In some embodiments, the width of the first slit 410 along the third direction can be the same as the width of the second slit 420 along the second direction, and the length of the first slit 410 along the second direction can be greater than the length of the second slit 420 along the third direction.

[0079] refer to Figure 1 Based on the above embodiment, the antenna body 200 may further include a radiation unit 220 and a grounding point 230 .

[0080] One end of the radiation unit 220 is electrically connected to the feeding point 210 , and the radiation unit 220 is spaced apart from the metal layer 300 . There is a first gap 410 and a second gap 420 between the radiation unit 220 and the metal layer 300 , so that the radiation unit 220 can couple current to the metal layer 300 through the first gap 410 and the second gap 420 .

[0081] By setting a coupling plate 500 at a position corresponding to the second slot 420 on the second side 120 of the circuit board 100 body to enhance the coupling current at the second slot 420, compared with the board-mounted antenna in the prior art, it is possible to use a radiation unit 220 with a shorter physical length than the prior art while maintaining the antenna body 200 of the present application to radiate signals of the same resonant frequency, thereby making the length of the antenna body 200 of the present application shorter than that of the prior art.

[0082] The grounding point 230 is disposed on a side of the feeding point 210 facing away from the radiation unit 220 . The feeding point 210 is disposed close to the grounding point 230 relative to the second slot 420 . The grounding point 230 is electrically connected to the metal ground layer 300 .

[0083] By arranging the feeding point 210 close to the grounding point 230 relative to the second slot 420 , when the coupling plate 500 is arranged in a region opposite to the second slot 420 , mutual interference between the coupling plate 500 and the feeding point 210 can be reduced, thereby improving the working stability of the onboard antenna.

[0084] refer to Figure 1 In a specific implementation, the radiation unit 220 may include a first radiation structure 221 and a second radiation structure 222 .

[0085] One end of the first radiation structure 221 along the second direction is connected to the feeding point 210, and the first radiation structure 221 and a portion of the metal layer 300 are arranged at intervals along the third direction, and the interval between the first radiation structure 221 and the metal layer 300 is a first gap 410. The width of the first radiation structure 221 along the third direction is smaller than the width of the metal layer 300 along the third direction.

[0086] A second radiation structure 222, the second radiation structure 222 is connected to the other end of the first radiation structure 221 away from the feeding point 210 along the second direction, the second radiation structure 222 and the metal layer 300 are arranged at intervals along the second direction, and the interval between the second radiation structure 222 and the metal layer 300 is a second gap 420;

[0087] In some embodiments, the width of the first radiation structure 221 along the third direction is smaller than the width of the second radiation structure 222 along the third direction, and the sum of the widths of the first radiation structure 221, the first gap 410, and the portion of the metal layer 300 spaced apart from the first radiation structure 221 along the third direction is the same as the width of the second radiation structure 222 along the third direction.

[0088] refer to Figure 8In some embodiments, the coupling plate 500 extends along the second direction, and in the first direction, a first overlapping region 510 is formed between the projection of the coupling plate 500 and the projection of the metal layer 300, and a second overlapping region 520 is formed between the projection of the coupling plate 500 and the projection of the second radiation structure 222. In the second direction, the length of the first overlapping region 510 is less than the length of the second overlapping region 520.

[0089] By making the length of the first overlapping area 510 along the second direction smaller than the length of the second overlapping area 520 along the second direction, it is possible to ensure that the projection of the second gap 420 in the first direction falls within the projection of the coupling plate 500 while the coupling plate 500 is disposed away from the feeding point 210, thereby avoiding mutual influence between the feeding point 210 and the coupling plate 500 and reducing the effect of the coupling plate 500 on enhancing the coupling current at the second gap 420.

[0090] refer to Figure 8 In a specific implementation, in the second direction, the length of the first overlapping region 510 is one quarter of the total length of the coupling plate 500 , and in the second direction, the length of the second overlapping region 520 is three quarters of the total length of the coupling plate 500 .

[0091] It can be understood that since the width of the second coupling slit 400 along the second direction is relatively small, in the first direction, the projection of the second coupling slit 400 on the coupling plate 500 accounts for a relatively small portion of the width of the coupling plate 500 along the second direction and can be ignored. Therefore, the length of the first overlapping area 510 can be approximately one-quarter of the total length of the coupling plate 500, and the length of the second overlapping area 520 can be approximately three-quarters of the total length of the coupling plate 500.

[0092] refer to Figure 8 In some embodiments, the length L1 of the metal layer 300 along the second direction may be approximately one-fourth of λ, where λ may be the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit 220 .

[0093] Based on the above embodiment, the length L2 of the radiation unit 220 along the second direction may be approximately one eighth of λ, where λ is the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit 220 .

[0094] An embodiment of the present application also provides a gateway device, which may include a main body and an onboard antenna arranged on the main body.

[0095] By setting the above-mentioned onboard antenna in the main body of the gateway device, it is possible to radiate signals with lower resonant frequencies while keeping the size of the antenna body 200 in the onboard antenna unchanged, thereby enabling the gateway device to radiate signals with lower resonant frequencies without increasing the volume, which is beneficial to the miniaturized design of the gateway device and improves the ease of use of the gateway device.

[0096] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0097] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0098] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0099] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0100] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A board-mounted antenna, characterized in that: include: A circuit board, comprising a first surface and a second surface arranged opposite to each other in a first direction, wherein a metal ground layer is arranged on the first surface of the circuit board; An antenna body, the antenna body being arranged on the first surface, and a coupling gap being provided between the antenna body and the metal layer; A coupling sheet, the coupling sheet is arranged on the second surface, and the coupling sheet is arranged opposite to the coupling slit; The antenna body couples current to the metal ground layer through a coupling slot, and the antenna body also couples current to the coupling plate, and the coupling plate is used to couple the current on the coupling plate to the metal ground layer through the coupling slot.

2. The onboard antenna according to claim 1, characterized in that: The coupling gap comprises: a first slit, the first slit extending along a second direction, the second direction being perpendicular to the first direction; a second slot, the second slot being away from the feeding point of the antenna body relative to the first slot, one end of the first slot away from the feeding point being connected to the second slot, the second slot being coplanar with the first slot, and the second slot extending along a third direction, the third direction intersecting with the second direction; In the first direction, the projection of the second slit falls within the projection of the coupling plate; And / or, the feeding point is located in the first gap, and the feeding point is spaced apart from the metal layer.

3. The onboard antenna according to claim 2, characterized in that: The antenna body also includes: A radiation unit, one end of which is electrically connected to the feeding point; the first gap and the second gap are provided between the radiation unit and the metal layer; A grounding point, wherein the grounding point is arranged on a side of the feeding point facing away from the radiation unit, and the grounding point is electrically connected to the metal ground layer.

4. The onboard antenna according to claim 3, characterized in that: The radiation unit comprises: a first radiating structure, wherein one end of the first radiating structure along the second direction is connected to the feeding point, the first radiating structure and the metal stratum are arranged at intervals along the third direction, and the interval between the first radiating structure and the metal stratum is the first gap; a second radiation structure, wherein the second radiation structure is connected to the other end of the first radiation structure along the second direction, the second radiation structure and the metal stratum are arranged at intervals along the second direction, and the interval between the second radiation structure and the metal stratum is the second gap; The sum of the widths of the first radiation structure, the first gap and the metal layer along the third direction is equal to the width of the second radiation structure along the third direction.

5. The onboard antenna according to claim 4, characterized in that: The coupling sheet extends along the second direction; In the first direction, a first overlapping area exists between the projection of the coupling plate and the projection of the metal layer, and a second overlapping area exists between the projection of the coupling plate and the projection of the second radiation structure; In the second direction, a length of the first overlapping area is smaller than a length of the second overlapping area.

6. The onboard antenna according to claim 5, characterized in that: In the second direction, the length of the first overlapping area is one quarter of the total length of the coupling plate; In the second direction, the length of the second overlapping area is three quarters of the total length of the coupling plate.

7. The onboard antenna according to claim 3, characterized in that: The length of the metal layer along the second direction is one quarter of λ, where λ is the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit.

8. The onboard antenna according to claim 3, characterized in that: The length of the radiation unit along the second direction is one eighth of λ, where λ is the wavelength corresponding to the center frequency of the resonant frequency of the radiation unit.

9. The onboard antenna according to claim 3, characterized in that: The circuit board has a metal layer, the metal layer is provided with the coupling slit, one end of the coupling slit is closed, and the other end of the coupling slit extends to the outer edge of the metal layer, and the coupling slit separates the metal layer into a first part for forming the metal ground layer and a second part for forming the radiation unit.

10. A gateway device, characterized in that: The invention comprises a main body, and an onboard antenna as claimed in any one of claims 1 to 9 arranged on the main body.

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