Antenna assembly and power distribution apparatus

Abstract

This application provides an antenna assembly and power distribution equipment. The antenna assembly includes a first feed circuit board, a grounding wire, a first antenna body, and a conductive connecting post. The first antenna body includes a main radiator and a coupling radiator. The main radiator is disposed on the first feed circuit board and located on the first side of the grounding wire, and is used to radiate electromagnetic wave signals in a first frequency band and a second frequency band. The coupling radiator is disposed on the first feed circuit board and located on the second side of the grounding wire, and is coupled to the grounding wire to form a parasitic antenna. The first end of the conductive connecting post is connected to the coupling radiator, and the second end of the conductive connecting post passes through the first feed circuit board and is used to connect to a metal housing. The signal wavelength of the electromagnetic wave signal corresponding to the second frequency band is λ, and the length of the conductive connecting post is less than 0.25*λ. This application can expand the bandwidth of the antenna assembly, achieve a low profile, improve radiation efficiency, and effectively reduce the installation height of the antenna assembly, thus reducing the space occupied by the antenna assembly.

Description

Technical Field

[0001] This application relates to the field of antenna technology, specifically to antenna components and power distribution equipment. Background Technology

[0002] Power distribution equipment is usually equipped with antennas for information exchange. Since power distribution equipment is generally equipped with a metal casing, which has a shielding effect, the antenna is usually placed on the outside of the metal casing. If the antenna is too close to the metal surface, it will affect the antenna's radiation efficiency. Therefore, in related technical solutions, in order to ensure the antenna's radiation efficiency, the antenna needs to be a quarter wavelength higher than the metal surface, which results in the antenna occupying a large space.

[0003] Therefore, how to ensure the radiation performance of the antenna while reducing the space required by the antenna has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, this application provides an antenna assembly and power distribution equipment that can both ensure the radiation performance of the antenna assembly and reduce the space required for the antenna assembly.

[0005] This application provides an antenna assembly for use in power distribution equipment, the power distribution equipment including a metal housing, the antenna assembly including: a first feed circuit board; a grounding wire disposed on the first feed circuit board; a first antenna body including a main radiator and a coupling radiator, the main radiator being disposed on the first feed circuit board and located on a first side of the grounding wire, the main radiator being electrically connected to the first feed circuit board, the main radiator being used to radiate electromagnetic wave signals of a first frequency band and a second frequency band; wherein the first frequency band is greater than the second frequency band; the coupling radiator being disposed on the first feed circuit board and located on a second side of the grounding wire and electrically coupled to the grounding wire to form a parasitic antenna, the first side and the second side of the grounding wire being adjacent; and a conductive connecting post, the first end of the conductive connecting post being connected to the coupling radiator, the second end of the conductive connecting post penetrating the first feed circuit board and used to connect to the metal housing; wherein the signal wavelength of the electromagnetic wave signal corresponding to the second frequency band is λ, and the length of the conductive connecting post is less than 0.25*λ.

[0006] The antenna assembly provided in this application includes a first feed circuit board, a grounding wire, a first antenna body, and a conductive connecting post. The grounding wire is disposed on the first feed circuit board. The first antenna body includes a main radiator and a coupling radiator. The main radiator is disposed on the first feed circuit board and located on the first side of the grounding wire. The main radiator is electrically connected to the first feed circuit board and is used to radiate electromagnetic wave signals in a first frequency band and a second frequency band, wherein the first frequency band is greater than the second frequency band. The coupling radiator is disposed on the first feed circuit board and located on the second side of the grounding wire, and is coupled to the grounding wire to form a parasitic antenna. The first side and the second side of the grounding wire are adjacent. The first end of the conductive connecting post is connected to the coupling radiator, and the second end of the conductive connecting post penetrates the first feed circuit board and is used to connect to a metal housing. The signal wavelength of the electromagnetic wave signal corresponding to the second frequency band is λ, and the length of the conductive connecting post is less than 0.25*λ. By radiating electromagnetic wave signals in the first and second frequency bands through the main radiator, the antenna assembly can radiate electromagnetic wave signals in two frequency bands. The coupled radiator is electrically coupled to the ground wire to form a parasitic antenna, and the coupled radiator is connected to the metal housing through conductive connecting posts. This can expand the bandwidth of the antenna assembly, achieve a low profile, and improve the radiation efficiency of the antenna assembly. Moreover, the length of the conductive connecting posts is less than one-quarter of the signal wavelength of the electromagnetic wave signal corresponding to the second frequency band, which can effectively reduce the installation height of the antenna assembly in the metal housing, thereby reducing the space occupied by the antenna assembly.

[0007] In one embodiment, the length of the coupled radiator and the length of the conductive connecting post are 0.25*λ.

[0008] In one embodiment, the coupling radiator includes a first connecting segment and a second connecting segment connected to each other. The first connecting segment extends along the length direction of the grounding wire and is electrically coupled to the grounding wire, while the second connecting segment bends away from the length direction of the grounding wire.

[0009] In one embodiment, one end of the first connecting segment is connected to the conductive connecting post, and the other end of the first connecting segment is connected to the second connecting segment. The second connecting segment extends in a direction perpendicular to the length of the grounding wire and then bends in a direction parallel to the length of the grounding wire, and extends toward the conductive connecting post.

[0010] In one embodiment, the first power supply circuit board includes a first surface and a second surface disposed opposite to each other. The grounding conductor is located on the first surface. The coupling radiator includes a first conductive layer, a second conductive layer, and a metal via. The first conductive layer is located on the first surface and on the second side of the grounding conductor. The second conductive layer is located on the second surface. The metal via penetrates the first power supply circuit board along the direction from the first surface to the second surface and electrically connects the first conductive layer and the second conductive layer.

[0011] In one embodiment, the coupling radiator includes a first coupling stub and a second coupling stub, and the conductive connecting post includes a first conductive post and a second conductive post. One end of the first conductive post is connected to the first coupling stub, and the other end is connected to the metal housing. One end of the second conductive post is connected to the second coupling stub, and the other end is connected to the metal housing. The first coupling stub is located on the second side of the grounding wire and is electrically coupled to the grounding wire to form a parasitic antenna. The second coupling stub is located on the opposite side of the second side of the grounding wire and is electrically coupled to the grounding wire to form a parasitic antenna.

[0012] In one embodiment, the first coupling stub and the second coupling stub have different lengths.

[0013] In one embodiment, the antenna assembly further includes a second antenna body, which is disposed on the first feed circuit board and spaced apart from the first antenna body.

[0014] In one embodiment, the antenna assembly further includes a third antenna body, which includes an upper radiating arm, a lower radiating arm, a second feed circuit board, and a feed post. The upper radiating arm is located on the first feed circuit board and is spaced apart from the first antenna body. The lower radiating arm is located on the second feed circuit board, which is parallel to the first feed circuit board. The feed post connects the first feed circuit board and the second feed circuit board and is electrically connected to the upper radiating arm and the lower radiating arm.

[0015] In one embodiment, the third antenna body further includes a support column, which is spaced apart from the upper radiating arm and the lower radiating arm, and connected to the first feed circuit board and the second feed circuit board.

[0016] A second aspect of this application provides a power distribution device, including a device body and an antenna assembly as described above, wherein the antenna assembly is disposed on the outer surface of the metal casing of the device body and electrically connected to the device body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure connecting the metal housing of the antenna assembly and the power distribution equipment provided in the embodiments of this application.

[0018] Figure 2 This is a schematic diagram of the antenna assembly provided in the embodiments of this application.

[0019] Figure 3 This is a schematic diagram of the structure of the main radiator in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the structure of the coupled radiator according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the antenna assembly from another perspective in an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the structure of an antenna assembly provided in another embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the structure of the second line body in an embodiment of this application.

[0024] Figure 8 A schematic diagram of the structure of the third antenna in an embodiment of this application.

[0025] Figure 9 This is a surface current distribution diagram of the first antenna when it operates at 900MHz.

[0026] Figure 10 This is a surface current distribution diagram of the first antenna when it operates at 2710MHz.

[0027] Figure 11 This is a surface current distribution diagram of the first antenna when it operates at 2690MHz.

[0028] Figure 12 This is a return loss curve of the antenna assembly according to an embodiment of this application. Detailed Implementation

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an element positioned in between. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be an element positioned in between. In this application, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "comprising" and "equivalent to," and any variations thereof, in the specification, claims, and foregoing description of the drawings, are intended to cover non-exclusive inclusion.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] Please see Figure 1 and Figure 2This application provides an antenna assembly 10, which can be applied to power distribution equipment (not fully shown in the figure). The power distribution equipment includes a metal housing 20. The antenna assembly 10 includes a first feed circuit board 100, a grounding wire 200, a first antenna body 300, and a conductive connecting post 400. The grounding wire 200 is disposed on the first feed circuit board 100. The first antenna body 300 includes a main radiator 310 and a coupling radiator 320. The main radiator 310 is disposed on the first feed circuit board 100 and located on the first side of the grounding wire 200. The main radiator 310 is used to radiate electromagnetic wave signals in a first frequency band and a second frequency band. The first frequency band is greater than the second frequency band. The coupling radiator 320 is disposed on the first feed circuit board 100 and located on the second side of the grounding wire 200, and is electrically coupled to the grounding wire 200 to form a parasitic antenna. The first side and the second side of the grounding wire 200 are adjacent. The first end of the conductive connecting post 400 is connected to the coupling radiator 320, and the second end of the conductive connecting post 400 passes through the first power feeding circuit board 100 and is used to connect to the metal housing 20.

[0034] The signal wavelength of the electromagnetic wave signal corresponding to the second frequency band is λ, and the length of the conductive connecting post 400 is less than 0.25*λ.

[0035] In the antenna assembly 10 provided in this embodiment, the main radiator 310 radiates electromagnetic wave signals in both the first and second frequency bands, enabling the antenna assembly 10 to radiate electromagnetic wave signals in both bands. The coupling radiator 320 is electrically coupled to the grounding wire 200 to form a parasitic antenna, and the coupling radiator 320 is connected to the metal housing 20 via a conductive connecting post 400. This expands the bandwidth of the antenna assembly 10, achieves a low profile, and improves the radiation efficiency of the antenna assembly 10. Furthermore, the length of the conductive connecting post 400 is less than one-quarter of the signal wavelength of the electromagnetic wave signal corresponding to the second frequency band, effectively reducing the installation height of the antenna assembly 10 within the metal housing 20, thereby reducing the space required by the antenna assembly 10.

[0036] In this embodiment, the coupled radiator 320 is connected to the metal housing 20 of the power distribution equipment via a conductive connecting post 400, which can form a parasitic monopole antenna, extend the bandwidth of the second frequency band of the antenna assembly 10, and improve the radiation efficiency of the antenna assembly 10 in the second frequency band. The first antenna body 300 in the antenna assembly 10 can be a mobile communication antenna, such as a 4G communication antenna, to realize mobile communication of the power distribution equipment.

[0037] It is understood that the first power supply circuit board 100 can be parallel to the plane of the metal housing 20 connected to the conductive connection post 400.

[0038] In some embodiments, the grounding wire 200 may be generally rectangular in shape and used to conduct electricity to the ground to ground the antenna. The first side of the grounding wire 200 may be in its width direction, and the second side of the grounding wire 200 may be in its length direction.

[0039] In some embodiments, the main radiator 310 may include a first main radiating branch 311, a second main radiating branch 312, and a third main radiating branch 313. The first main radiating branch 311 extends along the width direction of the grounding wire 200 and bends in a direction perpendicular to the width direction of the grounding wire 200 before extending toward the grounding wire 200.

[0040] The second main radiating branch 312 is disposed on the side of the first main radiating branch 311 close to the grounding wire 200. The second main radiating branch 312 extends along the width direction of the grounding wire 200, bends perpendicular to the width direction of the grounding wire 200, and extends away from the grounding wire 200. The second main radiating branch 312 is connected to the portion of the first main radiating branch 311 extending towards the grounding wire 200 in the width direction of the grounding wire 200.

[0041] The third main radiating branch 313 is located on the side of the first main radiating branch 311 away from the grounding wire body 200. The third main radiating branch 313 extends along the width direction of the grounding wire body 200, and after bending in a direction perpendicular to the width direction of the grounding wire body 200, it extends towards the grounding wire body 200.

[0042] Therefore, by bending the first main radiating branch 311, the second main radiating branch 312 and the third main radiating branch 313, the overall size of the main radiator 310 can be reduced, which is beneficial to reducing the width of the antenna assembly 10.

[0043] Among them, the first main radiating branch 311 and the second main radiating branch 312 are mainly used to radiate electromagnetic wave signals in the first frequency band, and the third main radiating branch 313 is mainly used to radiate electromagnetic wave signals in the second frequency band.

[0044] In some embodiments, the length of the first main radiating branch 311 is less than the length of the second main radiating branch 312, and the length of the second main radiating branch 312 is less than the length of the third main radiating branch 313. The width of the first main radiating branch 311 is less than the width of the second main radiating branch 312, and the width of the second main radiating branch 312 is less than the width of the third main radiating branch 313. Of course, the embodiments of this application are not limited thereto, and can be set according to actual application needs.

[0045] Specifically, such as Figure 3As shown, the first main radiating branch 311 may include a first radiating segment 3111 and a second radiating segment 3112. The first end of the first radiating segment 3111 is perpendicularly connected to the first end of the second radiating segment 3112. The second end of the first radiating segment 3111 extends along the width direction of the grounding wire 200, and the second end of the second radiating segment 3112 extends towards the grounding wire 200 and connects to the second main radiating branch 312. Thus, the first main radiating branch 311 is approximately "L"-shaped and bends towards the grounding wire 200.

[0046] The second main radiating branch 312 may include a third radiating segment 3121, a fourth radiating segment 3122, and a fifth radiating segment 3123. The third radiating segment 3121 is disposed on the side of the first main radiating branch 311 near the grounding conductor 200, connected to the first main radiating branch 311, and arranged parallel to the width direction of the grounding conductor 200. The first end of the third radiating segment 3121 is perpendicularly connected to the first end of the fourth radiating segment 3122, and the second end of the third radiating segment 3121 is perpendicularly connected to the second end of the fifth radiating segment 3123. The second end of the fourth radiating segment 3122 extends away from the grounding conductor 200, and the second end of the fifth radiating segment 3123 extends away from the grounding conductor 200 and connects to the third main radiating branch 3123. Thus, the second main radiating branch 312 is approximately “]” shaped and bends away from the grounding conductor 200.

[0047] The second end of the first radiating segment 3111 can extend towards the fifth radiating segment 3123. The length of the fourth radiating segment 3122 is less than the length of the fifth radiating segment 3123.

[0048] The third main radiating branch 313 may include a sixth radiating segment 3131 and a seventh radiating segment 3132. The sixth radiating segment 3131 is located on the side of the first main radiating branch 311 away from the grounding conductor 200. The first end of the sixth radiating segment 3131 is connected to the second main radiating branch 312. The second end of the sixth radiating segment 3131 extends along the width direction of the grounding conductor 200 and is perpendicularly connected to the first end of the seventh radiating segment 3132. The second end of the seventh radiating segment 3132 extends towards the grounding conductor 200. Thus, the third main radiating branch 313 is approximately "L"-shaped and bends towards the grounding conductor 200.

[0049] The antenna feed point is located between the second main radiating branch 312 and the grounding wire 200.

[0050] Please see Figure 4In some embodiments, the coupling radiator 320 may include a first connecting segment 321 and a second connecting segment 322 connected together. The first connecting segment 321 extends along the length direction of the grounding wire 200 and is electrically coupled to the grounding wire 200. The second connecting segment bends away from the length direction of the grounding wire 200.

[0051] Furthermore, one end of the first connecting segment 321 is connected to the conductive connecting post 400, and the other end of the first connecting segment 321 is connected to the second connecting segment 322. The second connecting segment 322 extends in the direction perpendicular to the length of the grounding wire 200 and then bends in the direction parallel to the length of the grounding wire 200, extending towards the conductive connecting post 400. Thus, by bending, the overall length of the coupling radiator 320 is reduced, which helps to reduce the length of the antenna assembly 10, and thus facilitates the miniaturization of the antenna assembly 10.

[0052] The length of the first connecting segment 321 can be greater than the length of the second connecting segment 322.

[0053] Specifically, please refer to Figure 2 , Figure 4 and Figure 5 The first feed circuit board 100 includes a first surface and a second surface disposed opposite to each other. A grounding wire 200 is located on the first surface. The coupling radiator 320 includes a first conductive layer 323, a second conductive layer 324, and a metal via 325. The first conductive layer 323 is located on the first surface of the first feed circuit board 100 and on the second side of the grounding wire 200. The second conductive layer 324 is located on the second surface of the first feed circuit board 100. The metal via 325 penetrates the first feed circuit board 100 along the direction from the first surface to the second surface and electrically connects the first conductive layer 323 and the second conductive layer 324. Thus, the first conductive layer 323 and the second conductive layer 324 are electrically connected via the metal via 325, which increases the coupling strength between the coupling radiator 320 and the grounding wire 200, further expanding the bandwidth of the antenna assembly 10.

[0054] The first conductive layer 323 may be composed of the first connecting segment 321 and the second connecting segment 322 as described above. The second conductive layer 324 may be in the shape of a straight strip, and its projection on the first surface of the first power supply circuit board 100 may partially overlap with the ground wire 200 and the first conductive layer 323, respectively.

[0055] In some embodiments, the length of the coupling radiator 320 and the length of the conductive connecting post 400 are 0.25*λ. It should be noted that the length of the coupling radiator 320 and the length of the conductive connecting post 400 refer to the sum of the total extended length of the coupling radiator 320 and the length of the conductive connecting post 400. Figure 4For example, the sum of the extension length of the coupling radiator 320 in the length direction of the grounding wire 200 (that is, the length of the first connecting segment 321) and the bending length (that is, the length of the second connecting segment 322).

[0056] In some embodiments, such as Figure 2 and Figure 5 As shown, the coupling radiator 320 includes a first coupling stub 320a and a second coupling stub 320b, and the conductive connecting post 400 includes a first conductive post 400a and a second conductive post 400b. One end of the first conductive post 400a is connected to the first coupling stub 320a, and the other end is connected to the metal housing 20. One end of the second conductive post 400b is connected to the second coupling stub 320b, and the other end is connected to the metal housing 20. The first coupling stub 320a is located on the second side of the grounding wire 200 and is electrically coupled to the grounding wire 200 to form a parasitic antenna. The second coupling stub 320b is located on the opposite side of the second side of the grounding wire 200 and is electrically coupled to the grounding wire 200 to form a parasitic antenna. This further expands the bandwidth of the antenna assembly 10 and improves its radiation efficiency.

[0057] The first coupling branch 320a and the second coupling branch 320b may each include a first connecting segment 321 and a second connecting segment 322. Alternatively, the first coupling branch 320a and the second coupling branch 320b may each include a first conductive layer 323, a second conductive layer 324, and a metal via 325. Or, the first conductive layer 323 of both the first coupling branch 320a and the second coupling branch 320b may be composed of corresponding first connecting segments 321 and second connecting segments 322.

[0058] In some embodiments, such as Figure 6 As shown, the first coupling stub 320a and the second coupling stub 320b have different lengths. This allows the parasitic antenna formed by the first coupling stub 320a and the ground wire 200, and the parasitic antenna formed by the second coupling stub 320b and the ground wire 200, to resonate at different frequencies, thereby further extending the bandwidth of the antenna assembly 10.

[0059] In some embodiments, such as Figure 6 As shown, the antenna assembly 10 may further include a second antenna 500, which is disposed on the first feed circuit board 100 and spaced apart from the first antenna 300. Thus, the antenna assembly 10 integrates the second antenna 500, enabling the antenna assembly 10 to radiate other electromagnetic wave signals.

[0060] like Figure 6 As shown, the second-side line 500 can be located on the opposite side of the first side of the grounding line 200, and the second-side line 500 can be disposed on the first side of the first power supply circuit board 100.

[0061] like Figure 7 As shown, the second antenna 500 can be a dipole antenna, and it may include a third connecting segment 510, a fourth connecting segment 520, and a fifth connecting segment 530. The first end of the third connecting segment 510 is connected to the fourth connecting segment 520, and the second end of the third connecting segment 510 extends towards the first antenna 300. The fourth connecting segment 520 includes a first part 521, a second part 522, and a third part 523. The first part 521 is perpendicularly connected to the first end of the third connecting segment 510. The first part 521 first extends in the direction perpendicular to the length of the grounding wire 200, then bends in the direction perpendicular to the width of the grounding wire 200, then bends again in the direction perpendicular to the length of the grounding wire 200, and extends away from the third connecting segment 510, perpendicularly connecting to the second part 522. The second part 522 extends away from the first antenna 300 and perpendicularly connects to the third part 523. The third part 523 first extends along the length of the grounding wire 200 and close to the first connecting segment 321, then bends along the width of the grounding wire 200 and close to the first part 521, and finally extends along the length of the grounding wire 200 and close to the first connecting segment 321, connecting perpendicularly to the fifth connecting segment 530. The fifth connecting segment 530 is collinearly spaced from the third connecting segment 510. The fifth connecting segment 530 first extends away from the third connecting segment 510, then bends along the length of the grounding wire 200 and extends along the width of the grounding wire 200, and then bends again along the length of the grounding wire 200 and close to the grounding wire 200. The feed point of the grounding wire 200 is located between the third connecting segment 510 and the fifth connecting segment 530.

[0062] In this embodiment, the polarization of the second antenna 500 can be parallel to the plane of the metal housing 20 to which the antenna assembly 10 is connected.

[0063] The second antenna 500 can be a Bluetooth antenna. Thus, the antenna assembly 10 can also enable Bluetooth communication.

[0064] Please see Figure 6 and Figure 8In some embodiments, the antenna assembly 10 may further include a third antenna body 600. The third antenna body 600 includes an upper radiating arm 610, a lower radiating arm 620, a second feed circuit board 630, and a feed post 640. The upper radiating arm 610 is located on the first feed circuit board 100 and spaced apart from the first antenna body 300. The lower radiating arm 620 is located on the second feed circuit board 630, which is parallel to the first feed circuit board 100. The feed post 640 connects the first feed circuit board 100 and the second feed circuit board 630, and is electrically connected to the upper radiating arm 610 and the lower radiating arm 620. Thus, the antenna assembly 10 integrates the third antenna body 600, enabling the antenna assembly 10 to radiate other electromagnetic wave signals.

[0065] The upper radiating arm 610 can be spaced apart from the first antenna body 300. Specifically, as shown... Figure 8 As shown, the upper radiating arm 610 can be located on the opposite side of the first side of the grounding wire 200, and the upper radiating arm 610 can be disposed on the first surface of the first feed circuit board 100. The feed post 640 can be disposed at the center of the upper radiating arm 610 and the lower radiating arm 620.

[0066] In some embodiments, the upper radiating arm 610 and the lower radiating arm 620 may have the same structure. Further, the projection of the upper radiating arm 610 onto the second power supply circuit board 630 may overlap with the lower radiating arm 620.

[0067] like Figure 8 As shown, the upper radiating arm 610 may include a rectangular radiating plate 611, a first branch 612, and a second branch 613. The rectangular radiating branch may be located at a diagonal position of the first feed circuit board 100, and the first branch 612 and the second branch 613 may be located at two opposite corners of the same diagonal of the rectangular radiating plate 611. The first branch 612 may first extend along the length direction of the grounding wire, then bend in the direction perpendicular to the length of the grounding wire, then bend in the direction perpendicular to the width of the grounding wire, and then bend again in the direction perpendicular to the length of the grounding wire. The second branch 613 may first extend along the width direction of the grounding wire, then bend in the direction perpendicular to the width of the grounding wire, then bend in the direction perpendicular to the length of the grounding wire, and then bend again in the direction perpendicular to the width of the grounding wire. Correspondingly, the structure of the lower radiating arm 620 is the same as that of the upper radiating arm 610, and will not be described again here.

[0068] Furthermore, the third antenna body 600 also includes a support column, which is spaced apart from the upper radiating arm 610 and the lower radiating arm 620, and connects the first feed circuit board 100 and the second feed circuit board 630. The support column enables a fixed connection between the first feed circuit board 100 and the second feed circuit board 630.

[0069] It is understandable that the lengths of the support column and the power supply column 640 are less than the length of the conductive connection column 400.

[0070] In this embodiment, the lower radiating arm 620 is fed to the upper radiating arm 610 through the feed post 640, which can form a polarization mode perpendicular to the plane of the metal housing 20 to which the antenna assembly 10 is connected.

[0071] The third antenna body 600 can be a WIFI antenna, and the third antenna body 600 can be used to realize WIFI communication.

[0072] In this embodiment, the antenna assembly 10 may simultaneously include a second antenna 500 and a third antenna 600, thus enabling the antenna assembly 10 to perform multiple communication functions. Both the second antenna 500 and the third antenna 600 can be disposed on opposite sides of the first side of the grounding wire 200, and are spaced apart. The polarization of the second antenna 500 is parallel to the plane of the metal housing 20 to which the antenna assembly 10 is connected, while the polarization of the third radiator is perpendicular to the plane of the metal housing 20 to which the antenna assembly 10 is connected. Therefore, by employing different polarizations, the second antenna 500 and the third antenna 600 can increase the isolation between them and prevent mutual interference.

[0073] Please see Figures 9 to 11 , Figures 9 to 11 Schematic diagrams of the surface current distribution of the first antenna 300 according to embodiments of this application when it operates at different frequencies are shown. Figure 9 The surface current distribution of the first antenna body 300 when it operates at 900MHz is shown. Figure 10 The surface current distribution of the first antenna body 300 when it operates at 2710 MHz is shown. Figure 11 The surface current distribution of the first antenna body 300 when it operates at 2690 MHz is shown.

[0074] like Figure 9 As shown, when the first antenna 300 operates at 900MHz, its surface current is mainly concentrated in the third main radiating branch 313, the first coupling branch 320a, the second coupling branch 320b, and the two conductive connecting posts 400. This indicates that the third main radiating branch 313, the first coupling branch 320a, the second coupling branch 320b, and the two conductive connecting posts 400 can be used to radiate lower frequency electromagnetic wave signals, that is, electromagnetic wave signals in the second frequency band.

[0075] like Figure 10As shown, when the first antenna body 300 operates at 2170MHz, the surface current is mainly concentrated in the conductive connecting post 400 connecting the first main radiating branch 311 and the first coupling branch 320a, indicating that the first main radiating branch 311 and the first conductive post 400a can be used to radiate electromagnetic wave signals in a higher frequency band, that is, electromagnetic wave signals in the first frequency band.

[0076] like Figure 11 As shown, when the first antenna 300 operates at 2690MHz, the surface current is mainly concentrated in the second conductive post 400b connected by the first main radiating branch 311, the second main radiating branch 312, and the second coupling branch 320b. This indicates that the first main radiating branch 311, the second main radiating branch 312, and the second conductive post 400b can be used to radiate electromagnetic wave signals in a higher frequency band, namely, electromagnetic wave signals in the first frequency band.

[0077] Please see Figure 12 , Figure 12 The diagram shows the return loss curve of the antenna assembly 10 according to an embodiment of this application. Figure 12 As shown, the antenna assembly 10 can operate in two frequency bands: 700MHz~960MHz and 1710MHz~2690MHz. Specifically, the first frequency band is 1710MHz~2690MHz, and the second frequency band is 700MHz~960MHz. The return loss of the antenna assembly 10 in the first frequency band (1710MHz~2690MHz) is less than -4.5dB, and the return loss in the second frequency band (700MHz~960MHz) is less than -2dB. The radiation efficiency of the antenna assembly 10 can reach over 30%.

[0078] This application embodiment also provides a power distribution device (not shown in the figure), which includes a device body (not shown in the figure) and an antenna assembly 10 as described above. The antenna assembly 10 is disposed on the outer surface of the metal shell of the device body and electrically connected to the device body.

[0079] Power distribution equipment can be a type of electrical energy distribution device that can be connected to the internal power grid of a household or industrial unit to achieve intelligent power distribution within that unit. In the event of a mains power outage, the power distribution equipment can also supply power to the internal power grid of a household or industrial unit by connecting to energy storage power supplies or other power supply equipment.

[0080] The antenna assembly 10 can be used to achieve the information communication required for smart power distribution within the internal power grid of a home or industrial unit. The main body of the device may include a metal housing 20 and a power distribution device (not shown) disposed inside the metal housing 20. The antenna assembly 10 is disposed on the outer surface of the metal housing 20 and electrically connected to the power distribution device. The antenna assembly 10 can be used to achieve the information communication required for smart power distribution within the internal power grid of a home or industrial unit.

[0081] The antenna assembly 10 of this application embodiment can radiate electromagnetic wave signals in two frequency bands, and has the advantages of wide bandwidth, low profile and high radiation efficiency. Moreover, the conductive connecting post 400 connecting the antenna assembly 10 and the metal housing 20 is less than one-quarter of the signal wavelength of the electromagnetic wave signal corresponding to the second frequency band, which can effectively reduce the installation height of the antenna assembly 10 in the metal housing 20, thereby reducing the space required for the antenna assembly 10.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An antenna assembly for use in power distribution equipment, the power distribution equipment comprising a metal housing, characterized in that, The antenna assembly includes: First power supply circuit board; A grounding wire is disposed on the first power supply circuit board; A first antenna element includes a main radiator and a coupling radiator. The main radiator is disposed on the first feed circuit board and located on the first side of the grounding wire. The main radiator is electrically connected to the first feed circuit board and is used to radiate electromagnetic wave signals in a first frequency band and a second frequency band, wherein the first frequency band is greater than the second frequency band. The coupling radiator is disposed on the first feed circuit board and located on the second side of the grounding wire, and is electrically coupled to the grounding wire to form a parasitic antenna. The first side and the second side of the grounding wire are adjacent to each other. A conductive connecting post, the first end of which is connected to the coupling radiator, and the second end of which penetrates the first feeding circuit board and is used to connect to the metal housing; Wherein, the signal wavelength of the electromagnetic wave signal corresponding to the second frequency band is λ, and the length of the conductive connecting post is less than 0.25*λ.

2. The antenna assembly according to claim 1, characterized in that, The length of the coupling radiator and the length of the conductive connecting post are 0.25*λ.

3. The antenna assembly according to claim 1, characterized in that, The coupling radiator includes a first connecting segment and a second connecting segment connected to each other. The first connecting segment extends along the length direction of the grounding wire and is electrically coupled to the grounding wire. The second connecting segment bends away from the length direction of the grounding wire.

4. The antenna assembly according to claim 3, characterized in that, One end of the first connecting segment is connected to the conductive connecting post, and the other end of the first connecting segment is connected to the second connecting segment. The second connecting segment extends in a direction perpendicular to the length of the grounding wire and then bends in a direction parallel to the length of the grounding wire, and extends toward the conductive connecting post.

5. The antenna assembly according to any one of claims 1-4, characterized in that, The first power supply circuit board includes a first surface and a second surface disposed opposite to each other. The grounding wire is located on the first surface. The coupling radiator includes a first conductive layer, a second conductive layer and a metal via. The first conductive layer is located on the first surface and on the second side of the grounding wire. The second conductive layer is located on the second surface. The metal via penetrates the first power supply circuit board along the direction from the first surface to the second surface and electrically connects the first conductive layer and the second conductive layer.

6. The antenna assembly according to any one of claims 1-4, characterized in that, The coupling radiator includes a first coupling stub and a second coupling stub. The conductive connecting post includes a first conductive post and a second conductive post. One end of the first conductive post is connected to the first coupling stub, and the other end is connected to the metal shell. One end of the second conductive post is connected to the second coupling stub, and the other end is connected to the metal shell. The first coupling stub is located on the second side of the grounding wire and is electrically coupled to the grounding wire to form a parasitic antenna. The second coupling stub is located on the opposite side of the second side of the grounding wire and is electrically coupled to the grounding wire to form a parasitic antenna.

7. The antenna assembly according to claim 6, characterized in that, The first and second coupling branches have different lengths.

8. The antenna assembly according to any one of claims 1-4, characterized in that, The antenna assembly further includes a second antenna body, which is disposed on the first feed circuit board and spaced apart from the first antenna body.

9. The antenna assembly according to any one of claims 1-4, characterized in that, The antenna assembly further includes a third antenna body, which includes an upper radiating arm, a lower radiating arm, a second feed circuit board, and a feed post. The upper radiating arm is located on the first feed circuit board and is spaced apart from the first antenna body. The lower radiating arm is located on the second feed circuit board, which is parallel to the first feed circuit board. The feed post connects the first feed circuit board and the second feed circuit board and is electrically connected to the upper radiating arm and the lower radiating arm.

10. The antenna assembly according to claim 9, characterized in that, The third antenna body also includes a support column, which is spaced apart from the upper radiating arm and the lower radiating arm, and is connected to the first feed circuit board and the second feed circuit board.

11. A power distribution device, characterized in that, It includes a device body and an antenna assembly as described in any one of claims 1 to 10, wherein the antenna assembly is disposed on the outer surface of the metal housing of the device body and electrically connected to the device body.

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