Radiating element and method of manufacturing the same, antenna device

Abstract

The present application relates to a kind of radiation units and its manufacturing method, antenna device.Radiation unit includes radiation surface and balun;Radiation surface includes: support substrate, support substrate includes oppositely arranged first surface and second surface;And at least two filter units, each filter unit includes the connecting metal and multiple metal air strip line structures arranged in support substrate, connecting metal and multiple metal air strip line structures are sequentially connected to form loop-shaped filter circuit;Part of metal air strip line structure is located first surface, part of metal air strip line structure is located second surface;Balun includes at least one balun ground, balun ground is configured as sheet metal part, and includes the first part and the second part spaced apart, the first part and the second part are connected with connecting metal one by one;Wherein, support substrate is configured with several hollow parts arranged through, and support substrate is configured as insulating piece.The radiation unit of the present application and its manufacturing method, antenna device are relatively high in radiation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a radiation unit, a manufacturing method thereof and an antenna device. BACKGROUND

[0002] The radiation unit is the main part of the antenna, which can transmit and receive electromagnetic waves in a directional manner, thereby realizing wireless communication. With multi-standard integrated antennas and green antennas gradually becoming the main demand of operators, the filtering characteristics and radiation efficiency characteristics of low-frequency radiation units have become a popular research direction. In the current filtering radiation unit, the radiation surface is mostly in the form of a PCB. However, the loss caused by the medium of the PCB will greatly reduce the radiation efficiency of the radiation unit. SUMMARY

[0003] Therefore, it is necessary to provide a radiation unit with high radiation efficiency, a manufacturing method thereof and an antenna device.

[0004] The first aspect of the embodiment of the present application provides a radiation unit, comprising a radiation surface and a balun.

[0005] The radiation surface comprises:

[0006] a support substrate comprising a first surface and a second surface arranged oppositely; and

[0007] at least two filtering units, each filtering unit comprising a connecting metal and a plurality of metal air strip line structures arranged on the support substrate, the connecting metal and the plurality of metal air strip line structures being electrically connected in sequence to form a loop-shaped filtering circuit; part of the metal air strip line structures are located on the first surface, and part of the metal air strip line structures are located on the second surface;

[0008] the balun comprises at least one balun ground, the balun ground is configured as a sheet metal part, and comprises a first part and a second part arranged at intervals, the first part and the second part are connected one by one with the connecting metal;

[0009] wherein the support substrate is configured with a plurality of hollow parts arranged through the support substrate, and the support substrate is configured as an insulating part.

[0010] In one of the embodiments, the balun further comprises a feeding part, the feeding part is configured as an air strip line; the feeding part is arranged one by one with the balun ground, and forms a microstrip line transmission line with the corresponding balun ground.

[0011] In one of the embodiments, the radiation surface comprises a printed circuit board, and the connecting metal is arranged on the surface of the printed circuit board.

[0012] The first part and the second part of the balun ground are connected to the hollow part of the support substrate, and are inserted into the corresponding connecting metal of the printed circuit board.

[0013] In one of the embodiments, the printed circuit board is located on the first surface of the support substrate.

[0014] In one of the embodiments, the first part and the second part of the balun are integrally configured with the corresponding connecting metal.

[0015] In one of the embodiments, the connecting metal is located on the second surface of the support substrate.

[0016] In one of the embodiments, the radiation unit further comprises a base, the base being located on the side of the balun facing away from the radiation surface.

[0017] The base is integrally configured with the plurality of baluns.

[0018] In one of the embodiments, the radiation unit is a dual-polarized radiation unit, the number of the connecting metals is four, and the number of the baluns is two; the four connecting metals are defined as a first connecting metal, a second connecting metal, a third connecting metal, and a fourth connecting metal, and the two baluns are defined as a first balun and a second balun.

[0019] The first connecting metal, the second connecting metal, the third connecting metal, and the fourth connecting metal are integrally connected to the first part of the first balun, the first part of the second balun, the second part of the first balun, and the second part of the second balun, respectively.

[0020] When the radiation unit is viewed from the side of the radiation surface, the first connecting metal and the first part of the first balun are located in a quadrant of the radiation surface, the second connecting metal and the first part of the second balun are located in a second quadrant of the radiation surface, the third connecting metal and the second part of the first balun are located in a third quadrant of the radiation surface, and the fourth connecting metal and the second part of the second balun are located in a fourth quadrant of the radiation surface, wherein the first, second, third, and fourth quadrants are divided by two intersecting axes with the center of the radiation surface.

[0021] In one of the embodiments, the balun further comprises two feeders, the two feeders being defined as a first feeder and a second feeder, and the two intersecting axes being defined as a first axis and a second axis.

[0022] The first part of the first balun and the second part of the first balun are located in a first polarization direction, the first part of the second balun and the second part of the second balun are located in a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal.

[0023] The first part of the first balun ground and the second part of the first balun ground are arranged in a spaced manner along the extension direction of the second axis, so that the first feed line is inserted between the first part of the first balun ground and the second part of the first balun ground; and / or

[0024] The first part of the second balun ground and the second part of the second balun ground are arranged in a spaced manner along the extension direction of the first axis, so that the second feed line is inserted between the first part of the second balun ground and the second part of the second balun ground.

[0025] In one of the embodiments, the metal-air strip line structure adjacent to the connecting metal is located on the opposite side of the support substrate from the connecting metal and is coupled to each other.

[0026] In one of the embodiments, the first surface and the second surface of the support substrate are both provided with a positioning part;

[0027] The connecting metal and the metal-air strip line structure coupled to each other are connected to the support substrate by means of hot melting or clamping fitting through the corresponding positioning parts.

[0028] In one of the embodiments, the projections of the connecting metal and the metal-air strip line structure adjacent to each other on the reference surface have an overlapping part to be coupled to each other, and the projection of the positioning part on the reference surface is located within the setting range of the overlapping part, and the reference surface is perpendicular to the thickness direction of the support substrate.

[0029] In one of the embodiments, the first surface and the second surface of the support substrate are both provided with a fitting part;

[0030] The two metal-air strip line structures electrically connected to each other and located on the first surface and the second surface respectively are connected to the support substrate by means of hot melting or clamping fitting with the corresponding fitting parts.

[0031] In one of the embodiments, the projections of the two metal-air strip line structures adjacent to each other and located on the first surface and the second surface respectively on the reference surface have an overlapping part to be coupled to each other, and the projection of the fitting part on the reference surface is located within the setting range of the overlapping part, and the reference surface is perpendicular to the thickness direction of the support substrate.

[0032] In one of the embodiments, among the plurality of metal-air strip line structures, part is configured as a first strip line structure, and the first strip line structure comprises a first coupling element, a first filter strip line and a first strip line connected in sequence;

[0033] Among the two first strip line structures adjacent to each other and located on the first surface and the second surface respectively, the projection of the first coupling element of one of the first strip line structures and the first strip line of the other first strip line structure on the reference surface at least partially overlaps to form an overlapping part.

[0034] In one of the embodiments, the plurality of metal-air strip line structures further include a second strip line structure, the second strip line structure including a second strip line, two second filter strip lines and two second coupling elements, the two second filter strip lines being connected to the second strip line, and the second filter strip line being connected with the second coupling element one by one;

[0035] The first strip line structure and the second strip line structure are adjacent to each other, one of which is located on the first surface and the other of which is located on the second surface, and the second coupling element of the second strip line structure at least partially overlaps the projection of the first strip line of the first strip line structure on the reference surface to form an overlapping portion.

[0036] In one of the embodiments, the connecting metal and the plurality of metal-air strip line structures are alternately arranged on the opposite sides of the support substrate in the connecting order.

[0037] In one of the embodiments, the support substrate includes an outer frame and a plurality of ribs connected to the inner side of the outer frame, and the plurality of ribs are arranged in a grid shape by being spaced apart from each other.

[0038] Each of the connecting metal and the metal-air strip line structure is provided with a rib.

[0039] In one of the embodiments, the radiating unit is a dual-polarized radiating unit, the number of the filter units is four, and the number of the baluns is two, and the four filter units are arranged in pairs in mutually orthogonal polarization directions.

[0040] The second aspect of the embodiments of the present application provides a manufacturing method of a radiating unit, which is used to manufacture the radiating unit as described above, and the manufacturing method of the radiating unit includes:

[0041] Cutting the planar metal plate to form a pre-processed piece, the pre-processed piece including a center part, at least two extension parts extending outward from the center part, and a connecting metal connected to the extension part one by one.

[0042] Vertically bending each connecting metal relative to the corresponding extension part to the first side of the thickness direction of the metal plate;

[0043] Vertically bending the extension part relative to the center part to the first side at the connecting position of each extension part and the center part, so that each connecting metal is coplanar.

[0044] The third aspect of the embodiments of the present application provides an antenna device, which includes a reflecting plate and the radiating unit as described above.

[0045] The balun of the radiating unit is connected to the reflecting plate.

[0046] The radiating unit and the manufacturing method thereof and the antenna device as described above have the following beneficial effects:

[0047] Since the connecting metal and the metal-air strip line structure are arranged on the support substrate, the first part and the second part of the balun are connected with the connecting metal one by one, on the one hand, the balun and the support substrate can be relatively fixed to each other through the connecting metal, and on the other hand, the first part and the second part of the balun can be electrically connected with the connecting metal.

[0048] In addition, part of the metal-air strip line structure is located on the first surface, and part of the metal-air strip line structure is located on the second surface, which is flexible in layout, and compared with all the metal-air strip line structures being arranged on the same side of the support substrate, the radiation unit can form better filtering characteristics. Further, the support substrate is configured with a plurality of hollow parts penetratingly arranged, and the support substrate is configured as an insulating member, so that compared with the case that the entire radiation surface is dielectric, there is no dielectric loss in the setting area of the hollow part, that is, there is no dielectric loss in at least part of the area on the radiation surface, which reduces the dielectric loss of the radiation surface, and thus improves the radiation efficiency of the radiation unit. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 A structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0050] Figure 2 A structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0051] Figure 3 A structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0052] Figure 4 A structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0053] Figure 5 A top view structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0054] Figure 6 A top view structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0055] Figure 7 A top view structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0056] Figure 8 A top view structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0057] Figure 9 A top view structure diagram of a radiation unit provided by an embodiment of the present application is provided.

[0058] Figure 10 Efficiency comparison chart of the radiation unit provided by the embodiment of the present application and the radiation unit of the related art.

[0059] BRIEF DESCRIPTION OF DRAWINGS

[0060] 100, radiation unit;

[0061] 10, radiation surface; 11, printed circuit board; 111, plug-in slot; 20, support substrate; 201, first surface; 202, second surface; 21, hollow part; 22, positioning part; 23, fitting part; 24, outer frame; 25, rib;

[0062] 30, filter unit;

[0063] 40, connecting metal; 41, first connecting metal; 42, second connecting metal; 43, third connecting metal; 44, fourth connecting metal;

[0064] 50, metal air strip line structure; 51, first strip line structure; 511, first filter strip line; 512, first strip line; 513, first coupling element; 52, second strip line structure; 521, second strip line; 522, second filter strip line; 523, second coupling element;

[0065] 60, balun; 61, balun ground; 6110, first part; 6120, second part; 611, first part of the first balun ground; 612, first part of the second balun ground; 613, second part of the first balun ground; 614, second part of the second balun ground; 615, connecting end; 62, first feed; 63, second feed;

[0066] 70, base;

[0067] 81, center part; 82, extension part;

[0068] F, first axis; S, second axis. DETAILED DESCRIPTION

[0069] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the present application. The present application is not limited to the embodiments disclosed below but can be carried out in various ways.

[0070] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0071] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0072] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0074] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. 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 intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0075] The radiating element and antenna device of the present application are described below with reference to the accompanying drawings.

[0076] Figure 1 This is a schematic diagram of the structure of the radiating unit provided in an embodiment of this application; Figure 2 This is an exploded structural diagram of a radiating element provided in an embodiment of this application; Figure 3 A schematic diagram of another structure of the radiating unit provided in an embodiment of this application; Figure 4 An exploded structural diagram of another structure of the radiating unit provided in an embodiment of this application; Figure 5 A top view of the balun and connecting metal connection in the radiating element provided in an embodiment of this application; Figure 6 This is a schematic diagram showing the interconnection of the connecting metal, the supporting substrate, and the metal air strip structure in the radiating unit provided in the embodiment of this application. Figure 7 This is a schematic diagram showing the interconnection of the connecting metal, the supporting substrate, and the metal air strip structure in a radiating unit with another structure provided in an embodiment of this application.

[0077] Reference Figure 1 , Figure 2 The radiating unit 100 provided in this embodiment includes a radiating surface 10 and a balun 60. The radiating surface 10 includes a supporting substrate 20 and at least two filtering units 30. The balun 60 includes at least one balun ground 61.

[0078] The support substrate 20 comprises a first surface 201 and a second surface 202 arranged oppositely. Each of the at least two filtering units 30 comprises a connecting metal 40 and a plurality of metal-air strip line structures 50 arranged on the support substrate 20, and the connecting metal 40 and the plurality of metal-air strip line structures 50 are electrically connected in sequence to form a loop-shaped filtering circuit. Part of the metal-air strip line structures 50 are arranged on the first surface 201, and part of the metal-air strip line structures 50 are arranged on the second surface 202. The balun 61 is configured as a sheet metal part, and the balun 61 comprises a first part 6110 and a second part 6120 arranged at intervals, and the first part 6110 and the second part 6120 of the balun 61 can be arranged on the same polarization direction. The first part 6110 and the second part 6120 of the balun 61 are connected to the connecting metal 40 one by one. The support substrate 20 is configured as an insulating part, and a plurality of hollow parts 21 are arranged through the support substrate 20.

[0079] Since the connecting metal 40 and the metal-air strip line structure 50 are arranged on the support substrate 20, the first part 6110 and the second part 6120 of the balun 61 are connected to the connecting metal 40 one by one. On the one hand, the first part 6110 and the second part 6120 of the balun 61 can be fixed to each other through the connecting metal 40 and the support substrate 20. On the other hand, the first part 6110 and the second part 6120 of the balun 61 can be electrically connected to the connecting metal 40.

[0080] In addition, part of the metal-air strip line structures 50 are arranged on the first surface 201, and part of the metal-air strip line structures 50 are arranged on the second surface 202. The layout is flexible, and compared with the scheme in which all the metal-air strip line structures are arranged on the same side of the support substrate, the radiation unit 100 can form better filtering characteristics. Further, the support substrate 20 is configured as an insulating part, and a plurality of hollow parts 21 are arranged through the support substrate 20. Compared with the case in which the entire radiation surface 10 is a PCB medium, the setting area of the hollow part 21 does not have medium loss, that is, at least part of the area on the radiation surface 10 does not have medium loss, which reduces the medium loss of the radiation surface 10, and thus improves the radiation efficiency of the radiation unit 100.

[0081] It can be understood that, in the embodiments of the present application, the radiation unit 100 is taken as an example of a dual-polarized radiation unit, the number of filtering units 30 is four, the number of baluns 61 is two, and the four filtering units 30 are arranged on mutually orthogonal polarization directions in pairs. For the case in which the radiation unit 100 is a single-polarized radiation unit, the number of filtering units 30 is two, and the number of baluns 61 is one. In this case, the connection of each part is similar to that of the dual-polarized radiation unit, which is not shown here.

[0082] The support substrate 20 can be, for example, a plastic component, which is lightweight and provides good insulation. Furthermore, the connecting metal 40 and the multiple metal air strip structures 50 are sequentially electrically connected to form a loop-shaped filter circuit. In some embodiments, the connecting metal 40 and the multiple metal air strip structures 50 can be sequentially connected end-to-end to form a loop-shaped filter circuit. The statement that some metal air strip structures 50 are located on the first surface 201 and some on the second surface 202 means that at least some of the multiple metal air strip structures 50 are located on the first surface 201 and at least some on the second surface 202. Metal air strip structures 50 located on the same surface can be directly connected to each other for electrical connection, while metal air strip structures 50 located on different surfaces can be coupled together through the support substrate 20. This coupled connection method, compared to direct connection, also results in better filtering performance of the radiation unit 100.

[0083] In addition, the support substrate 20 has a number of through-hole portions 21. The size and number of the through-hole portions 21 can be set according to actual needs. It is understood that the larger the area of ​​the through-hole portions 21, the more obvious the effect of reducing dielectric loss.

[0084] Furthermore, the balun 61 is configured as a sheet metal part, and the first part 6110 and the second part of the balun 61 are connected one-to-one with the corresponding connecting metal 40. For example, refer to... Figure 1 , Figure 2 In each of the two baluns 61, the first portion 6110 and the second portion 6120 are each welded to a corresponding connecting metal 40 in a one-to-one correspondence. It is understood that at the welding points between the first portion 6110 and the second portion 6120 of the balun 61 and the connecting metal 40, the surface can be partially electroplated to facilitate welding. Alternatively, both the balun 61 and the connecting metal 40 can be electroplated entirely. In other embodiments, refer to... Figure 3 , Figure 4 The first part 6110 and the second part 6120 of the balun 61 are integrally formed with the corresponding connecting metal 40, which can achieve electroplating-free operation and save on installation process.

[0085] In the embodiments of this application, Figure 1 , Figure 2 In this scheme, the radiating surface 10 includes a printed circuit board 11, and a connecting metal 40 is disposed on the surface of the printed circuit board 11. The connecting end 615 of the first part 6110 and the second part 6120 of the balun 61 passes through the cutout portion 21 of the support substrate 20 and is inserted into the corresponding connecting metal 40 of the printed circuit board 11.

[0086] In some embodiments, the printed circuit board 11 is provided with a plurality of insertion slots 111, and the connecting terminals 615 are inserted into the insertion slots 111 one by one, so as to facilitate the relative positioning of the printed circuit board 11 and the baluns 61.

[0087] Further, the printed circuit board 11 is located on the first surface 201 of the support substrate 20. In this way, the printed circuit board 11 is located on the side of the support substrate 20 that is away from the baluns 61, i.e., the printed circuit board 11 is located on the outermost side of the radiating unit 100, so as to facilitate the soldering operation of the baluns 61 and the printed circuit board 11. Of course, the connecting metal 40 can be located on the surface of the printed circuit board 11 that is away from the support substrate 20, so as to facilitate the soldering operation of the connecting metal 40 and the baluns 61.

[0088] In Figure 3 、 Figure 4 another structure of the radiating unit 100 shown in the drawings, the first part 6110 and the second part 6120 of the balun 61 are configured in an integrated structure with the corresponding connecting metal 40. In this way, the electrical connection of the connecting metal 40 and the balun 61 can be achieved without plating. For a dual-polarized radiating unit, the number of baluns 61 is two, and the number of the first part 6110 and the second part 6120 is four, and the number of the corresponding connecting metal 40 is also four. In the case where the first part 6110 and the second part 6120 of the balun 61 are configured in an integrated structure with the corresponding connecting metal 40, the four integrated structures as described above can be arranged at intervals from each other.

[0089] Further, in the scheme of Figure 3 、 Figure 4 , the connecting metal 40 is located on the second surface 202 of the support substrate 20. In this way, the support substrate 20 is installed to the side of the connecting metal 40 that is away from the balun 61.

[0090] Continuing to refer to Figure 3 and Figure 4 , the radiating unit 100 further comprises a base 70, the base 70 is located on the side of the balun 61 that is away from the radiating surface 10, and the base 70 is configured in an integrated structure with the plurality of baluns 61.

[0091] In a specific implementation, for the case where the radiating unit 100 is a dual-polarized radiating unit, the number of the connecting metal 40 and the number of the balun 61 are both two. The four connecting metals 40 are defined as a first connecting metal 41, a second connecting metal 42, a third connecting metal 43, and a fourth connecting metal 44, and the two baluns 61 are defined as a first balun and a second balun.

[0092] The first connecting metal 41, the second connecting metal 42, the third connecting metal 43 and the fourth connecting metal 44 are integrally connected to the first part 611 of the first balun ground, the first part 612 of the second balun ground, the second part 613 of the first balun ground and the second part 614 of the second balun ground respectively. That is, the first connecting metal 41 is integrally connected to the first part 611 of the first balun ground. The second connecting metal 42 is integrally connected to the first part 612 of the second balun ground. The third connecting metal 43 is integrally connected to the second part 613 of the first balun ground. The fourth connecting metal 44 is integrally connected to the second part 614 of the second balun ground.

[0093] In combination Figure 3 And Figure 5 (For the convenience of observation, each balun ground is shown in a cross-section line), when viewing the radiation unit 100 from the side of the radiation surface 10, that is, when viewing the radiation unit 100 vertically from the side of the radiation surface 10, the first connecting metal 41 and the first part 611 of the first balun ground are located in a quadrant of the radiation surface 10, the second connecting metal 42 and the first part 612 of the second balun ground are located in a second quadrant of the radiation surface 10, the third connecting metal 43 and the second part 613 of the first balun ground are located in a third quadrant of the radiation surface 10, and the fourth connecting metal 44 and the second part 614 of the second balun ground are located in a fourth quadrant of the radiation surface 10, wherein the first, second, third and fourth quadrants are divided by two orthogonal axes whose intersection points coincide with the center of the radiation surface 10.

[0094] It can be understood that the first part 611 of the first balun ground located in the first quadrant and the second part 613 of the first balun ground located in the third quadrant belong to the first balun ground, and both are located in a polarization direction. Similarly, the first part 612 of the second balun ground located in the second quadrant and the second part 614 of the second balun ground located in the fourth quadrant belong to the second balun ground, and both are located in another polarization direction.

[0095] In the embodiment of the present application, the balun 60 further includes a feed, and the feed is configured as an air strip line. The feed can be provided in one-to-one correspondence with the balun ground 61 and form a microstrip transmission line with the corresponding balun ground 61. Exemplarily, when the radiation unit 100 is a dual-polarized radiation unit, the number of feeds can be two, and the two feeds can be defined as a first feed 62 and a second feed 63, and the two orthogonal axes can be defined as a first axis F and a second axis S. The first part 611 of the first balun ground and the second part 613 of the first balun ground are located in a first polarization direction, the first part 612 of the second balun ground and the second part 614 of the second balun ground are located in a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal.

[0096] The first portion 611 and the second portion 613 of the first balun are arranged at a distance along the extension direction of the second axis S, so that the first power supply 62 can be inserted between the first portion 611 and the second portion 613 of the first balun. Further, the first portion 612 and the second portion 614 of the second balun are arranged at a distance along the extension direction of the first axis F, so that the second power supply 63 can be inserted between the first portion 612 and the second portion 614 of the second balun.

[0097] In a specific implementation, the first power supply element 62 is spaced apart from both the first portion 611 and the second portion 613 of the first balun, such that the first power supply element 62 is coupled to both the first portion 611 and the second portion 613 of the first balun. Similarly, the second power supply element 63 is spaced apart from both the first portion 612 and the second portion 614 of the second balun, such that the second power supply element 63 is coupled to both the first portion 612 and the second portion 614 of the second balun.

[0098] The spacing here can be greater than 0.5 mm and less than 1 mm. In some embodiments, the first power supply 62 is connected to the first portion 611 and the second portion 613 of the first balun by plastic fasteners or the like, and the second power supply 63 is also connected to the first portion 612 and the second portion 614 of the second balun by plastic fasteners or the like.

[0099] In this embodiment of the application, combined with Figure 6 and Figure 7 The metal air strip structure 50, which is adjacent to the connecting metal 40, is located on the opposite side of the supporting substrate 20 and is coupled to each other.

[0100] For example, in Figure 6 In the example, the connecting metal 40 is located on the first surface 201 of the supporting substrate 20, and the metal air strip structure 50 adjacent to the connecting metal 40 is located on the second surface 202 of the supporting substrate 20. Figure 7 In the example, the connecting metal 40 is located on the second surface 202 of the supporting substrate 20, and the metal air strip structure 50 adjacent to the connecting metal 40 is located on the first surface 201 of the supporting substrate 20.

[0101] In some embodiments, refer to Figure 6 and Figure 7 The first surface 201 and the second surface 202 of the support substrate 20 are both provided with positioning portions 22. The connecting metal 40 and the metal air strip structure 50, which are coupled to each other, are connected to the support substrate 20 by means of heat fusion or snap-fit ​​through the corresponding positioning portions 22.

[0102] Exemplarily, the connecting metal 40 is provided with a through hole at a position corresponding to the positioning portion 22, and the metal-air strip line structure 50 is also provided with a through hole at a position corresponding to the positioning portion 22, and the positioning portion 22 is connected with the connecting metal 40 and the metal-air strip line structure 50 by penetrating the through holes.

[0103] Further, projections of the connecting metal 40 and the metal-air strip line structure 50 on a reference plane are overlapped, so that the two can be coupled and connected through the support substrate 20, and the projection of the positioning portion 22 on the reference plane is located within the setting range of the overlapped portion, wherein the reference plane is perpendicular to the thickness direction of the support substrate 20, for example, the reference plane can be parallel to the first surface 201 and the second surface 202. In this way, the coupling gap between the connecting metal 40 and the metal-air strip line structure 50 can be kept constant.

[0104] In the embodiments of the present application, continuing to refer to Figure 6 and Figure 7 , the first surface 201 and the second surface 202 of the support substrate 20 are both provided with a cooperating portion 23. Two metal-air strip line structures 50 that are electrically connected to each other and respectively located on the first surface 201 and the second surface 202 are connected with the support substrate 20 by being hot-melted or clamped with the corresponding cooperating portion 23.

[0105] Further, projections of the two metal-air strip line structures 50 that are adjacent to each other and respectively located on the first surface 201 and the second surface 202 on a reference plane are overlapped. In this way, the two can be coupled and connected. The projection of the cooperating portion 23 on the reference plane is located within the setting range of the overlapped portion, and the reference plane is perpendicular to the thickness direction of the support substrate 20. In this way, the coupling gap of the two metal-air strip line structures 50 is more stable.

[0106] In addition, the two metal-air strip line structures 50 that are coupled and connected to each other are parallel to each other and have a preset interval in the thickness direction of the support substrate 20. The preset interval may, for example, correspond to the thickness dimension of the support substrate 20.

[0107] In some embodiments, continuing to refer to Figure 6 and Figure 7 , among the plurality of metal-air strip line structures 50, part of the metal-air strip line structures 50 are configured as first strip line structures 51, and the first strip line structures 51 include a first coupling element 513, a first filter strip line 511, and a first strip line 512 connected in sequence.

[0108] two first strip line structures 51 located at the first surface 201 and the second surface 202 respectively, wherein the first coupling element 513 of one of the first strip line structures 51 at least partially overlaps the first strip line 512 of the other first strip line structure 51 in the projection on the reference plane to form an overlapping portion and is coupled through the support substrate 20.

[0109] In some embodiments, the plurality of metal-air strip line structures 50 further comprise a second strip line structure 52, the second strip line structure 52 comprising a second strip line 521, two second filter strip lines 522 and two second coupling elements 523. The two second filter strip lines 522 are connected to the second strip line 521, and each of the second filter strip lines 522 is connected to one of the second coupling elements 523.

[0110] In some embodiments, the first strip line structure 51 and the second strip line structure 52 are located adjacent to each other, one of the first strip line structure 51 and the second strip line structure 52 is located at the first surface 201 and the other is located at the second surface 202, and the second coupling element 523 of the second strip line structure 52 at least partially overlaps the first strip line 512 of the first strip line structure 51 in the projection on the reference plane to form an overlapping portion and is coupled through the support substrate 20.

[0111] Further, in combination with Figure 1 , Figure 3 , Figure 6 and Figure 7 , as described above, the connection metal 40 and the plurality of metal-air strip line structures 50 in the filter unit 30 are sequentially connected end to end to form a filter circuit, and the connection metal 40 and the plurality of metal-air strip line structures 50 are alternately arranged on opposite sides of the support substrate 20 according to the connection order. In some embodiments, the structure of each filter unit 30 is the same, and is symmetrically arranged with respect to the center of the radiation surface 10.

[0112] For example, in the examples of Figure 1 and Figure 6 , for the filter unit 30 located at the lower left corner, Figure 1 the connection metal 40 is located at the first surface 201, the two first strip line structures 51 adjacent to the connection metal 40 are located at the second surface 202, the two first strip line structures 51 next to the two first strip line structures 51 adjacent to the connection metal 40 are located at the first surface 201, and the second strip line structure 52 is located at the second surface.

[0113] And in the examples of Figure 3 and Figure 7 , for the filter unit 30 located at the lower left corner, Figure 3 the connection metal 40 is located at the second surface 202, the two first strip line structures 51 adjacent to the connection metal 40 are located at the first surface 201, the two first strip line structures 51 next to the two first strip line structures 51 adjacent to the connection metal 40 are located at the second surface 202, and the second strip line structure 52 is located at the first surface 201.

[0114] In the filter unit 30, the number of the connecting metals 40 and the second strip line structures 52 is one, and the number of the first strip line structures 51 is an even number, for example, the number of the first strip line structures 51 is four. It can be understood that in other embodiments, the number of the first strip line structures 51 in one branch can be other than four, and the number of the first strip line structures 51 is the number of levels of the filter structure. Figure 6 And Figure 7 In the example of Figure 2 and Figure 4 , a symmetrical filter circuit is formed in one filter unit 30, and the number of the first filter strip lines 511 and the second filter strip lines 522 in one branch is three, so the filter unit 30 is a 3-level filter structure. In other embodiments, the number of the first filter strip lines 511 and the second filter strip lines 522 in one branch can also be other than three, and the number of the first filter strip lines 511 is the number of levels of the filter structure. Here, the number of levels of the filter structure can be set according to actual needs, for example, it can be 4 levels, 5 levels, etc.

[0115] Referring to Figure 2 and Figure 4 , the support substrate 20 includes an outer frame 24, and a plurality of ribs 25 connected to the inner side of the outer frame 24, the plurality of ribs 25 are arranged in a grid shape by being spaced apart from and intersecting each other. Each of the connecting metals 40 and the metal air strip line structures 50 is provided with a corresponding rib 25. The width of the rib 25 can be smaller than the corresponding metal air strip line structure 50, so as to minimize the dielectric loss. The extension direction of the rib 25 can be the same as the extension direction of the corresponding metal air strip line structure 50.

[0116] In the embodiments of the present application, an antenna device is also provided, which includes a reflector plate and the above-mentioned radiating unit 100, and the balun ground 61 of the radiating unit 100 is connected to the reflector plate through the base 70.

[0117] Figure 8 A flowchart of a manufacturing method of the radiating unit provided in the embodiments of the present application is shown in the figure; Figure 9 A connection structure diagram of the balun ground and the base in the radiating unit provided in the embodiments of the present application is shown in the figure.

[0118] In combination with Figure 8 and Figure 9 , the embodiments of the present application also provide a manufacturing method of a radiating unit, which is used to manufacture the above-mentioned radiating unit 100, and the method includes:

[0119] S10, cutting a planar metal plate to form a pre-processed piece, the pre-processed piece includes a center part 81, at least two extension parts 82 extending outward from the center part 81, and a connecting metal 40 connected to each extension part 82 one by one.

[0120] S20, vertically bending each connecting metal 40 relative to the corresponding extension part 82 to the first side of the thickness direction of the metal plate.

[0121] S30, at the connection position of each extension part 82 and the center part 81, the extension part 82 is vertically bent relative to the center part 81 to the first side, so that each connection metal 40 is coplanar.

[0122] The radiation unit 100 made by the above method, because the same piece of flat metal plate is bent to form, does not need many PCB solder points, and because of the hardness of the metal itself, it can support the connection metal 40, the balun ground 61 and the base 70, saving the problem of supporting the traditional PCB unit with plastic parts, saving the number of components, simplifying the assembly and welding, and improving the efficiency of the radiation unit. At the same time, because the connection metal 40 and the balun ground 61 do not need to be electroplated, the cost is also reduced.

[0123] After step S30, a step of connecting the connection metal 40, the support substrate 20 and each metal air strip line structure 50 to each other can also be included.

[0124] Figure 10 The efficiency comparison chart of the radiation unit provided by the embodiment of the present application and the radiation unit of the related art is shown in the following figure. The radiation unit in the related art adopts the form of PCB. Figure 10 In the figure, the horizontal axis is the working frequency of the radiation unit, and the vertical axis is the radiation efficiency value. Figure 10 It can be seen that the efficiency of the radiation unit 100 of the present application is always greater than the efficiency of the radiation unit in the related art in the working frequency range (approximately in the range of 690GHz-960GHz).

[0125] The technical features of the above-described embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0126] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A radiation unit, characterized by The radiation surface and the balun are included; The radiation surface includes: A support substrate including oppositely arranged first and second surfaces; and At least two filter units, each of which includes a connecting metal and a plurality of metal-air strip line structures provided on the support substrate, the connecting metal and the plurality of metal-air strip line structures being sequentially connected to form a loop-shaped filter circuit; part of the metal-air strip line structures are located on the first surface, and part of the metal-air strip line structures are located on the second surface; The balun includes at least one balun ground, which is configured as a sheet metal part and includes a first part and a second part arranged at intervals, and the first part and the second part are connected to the connecting metal one by one; Wherein, a plurality of hollow parts are provided on the support substrate, and the support substrate is configured as an insulating part; Among the plurality of metal-air strip line structures, part is configured as a first strip line structure, and another part is configured as a second strip line structure; one of the first strip line structure and the second strip line structure located on the first surface and the other located on the second surface; The projections of two metal-air strip line structures on the reference surface, which are adjacent to each other and located on the first surface and the second surface respectively, have overlapping parts to be coupled to each other; the two metal-air strip line structures coupled to each other are parallel to each other and have a preset interval in the thickness direction of the support substrate; The metal-air strip line structure adjacent to the connecting metal is located on the opposite side of the support substrate from the connecting metal; the projections of the connecting metal and the metal-air strip line structure adjacent to each other on the reference surface have overlapping parts to be coupled to each other; The connecting metal and the plurality of metal-air strip line structures are alternately arranged on opposite sides of the support substrate in the connection order; The support substrate includes an outer frame and a plurality of ribs connected to the inner side of the outer frame, and the plurality of ribs are arranged at intervals and intersected to form a grid shape; Each of the connecting metal and the metal-air strip line structure is provided with the rib, the extension direction of the rib is the same as that of the corresponding metal-air strip line structure, and the width of the rib is smaller than that of the corresponding metal-air strip line structure.

2. The radiation unit of claim 1, characterized in that The balun further includes a feed part configured as an air strip line; The feed part is provided one by one corresponding to the balun ground and forms a microstrip transmission line with the corresponding balun ground.

3. The radiation unit of claim 1, wherein The radiation surface includes a printed circuit board, and the connecting metal is arranged on the surface of the printed circuit board; The connecting ends of the first part and the second part of the balun ground penetrate the hollow part of the support substrate and are inserted into the corresponding connecting metal of the printed circuit board.

4. Radiating element according to claim 3, characterized in that The printed circuit board is located on the first surface of the support substrate.

5. The radiation unit of claim 1, wherein, The first part and the second part of the balun ground and the corresponding connecting metal are configured as an integral structure.

6. Radiating element according to claim 5, characterized in that The connecting metal is located on the second surface of the support substrate.

7. The radiation unit of claim 5, wherein The radiation unit further comprises a base located on a side of the bavenite away from the radiation surface; The base and the bavenite are configured as an integral structure.

8. The radiation unit of claim 5, characterized in that The radiation unit is a dual-polarized radiation unit, the number of the connecting metals is four, and the number of the bavenites is two; the four connecting metals are defined as a first connecting metal, a second connecting metal, a third connecting metal, and a fourth connecting metal, and the two bavenites are defined as a first bavenite and a second bavenite; The first connecting metal, the second connecting metal, the third connecting metal, and the fourth connecting metal are integrally connected to a first part of the first bavenite, a first part of the second bavenite, a second part of the first bavenite, and a second part of the second bavenite, respectively; When the radiation unit is viewed from the side of the radiation surface, the first connecting metal and the first part of the first bavenite are located in a quadrant of the radiation surface, the second connecting metal and the first part of the second bavenite are located in a second quadrant of the radiation surface, the third connecting metal and the second part of the first bavenite are located in a third quadrant of the radiation surface, and the fourth connecting metal and the second part of the second bavenite are located in a fourth quadrant of the radiation surface, wherein the first, second, third, and fourth quadrants are divided by two intersecting axes with the center of the radiation surface.

9. Radiating element according to claim 8, characterized in that The bavenite further comprises two feeders, and the two feeders are defined as a first feeder and a second feeder, and the two intersecting axes are defined as a first axis and a second axis; The first part of the first bavenite and the second part of the first bavenite are located in a first polarization direction, the first part of the second bavenite and the second part of the second bavenite are located in a second polarization direction, the first polarization direction and the second polarization direction are orthogonal; The first part of the first bavenite and the second part of the first bavenite are arranged in a spaced manner along the extension direction of the second axis, so that the first feeder is inserted between the first part of the first bavenite and the second part of the first bavenite; And / or The first part of the second bavenite and the second part of the second bavenite are arranged in a spaced manner along the extension direction of the first axis, so that the second feeder is inserted between the first part of the second bavenite and the second part of the second bavenite.

10. The radiation unit of claim 3, wherein, The first surface and the second surface of the support substrate are both provided with positioning portions; The connecting metals and the metal-air strip structures coupled to each other are connected to the support substrate through the corresponding positioning portions by means of hot melting or clamping.

11. Radiating element according to claim 10, characterized in that The projection of the positioning portions on the reference surface is located in the setting range of the overlapping portion, and the reference surface is perpendicular to the thickness direction of the support substrate.

12. The radiation unit according to any of claims 1-9, characterized by The first surface and the second surface of the support substrate are both provided with matching portions; The two metal-air strip structures electrically connected to each other and located on the first surface and the second surface are connected to the support substrate by hot melting or clamping with the corresponding matching portions.

13. The radiation unit of claim 12, characterized in that A projection of the matching portion on the reference surface, which is perpendicular to the thickness direction of the support substrate, is located within the setting range of the overlapping portion.

14. Radiating element according to claim 13, characterized in that The first strip line structure comprises a first coupling element, a first filter strip line and a first strip line connected in sequence. Two of the first strip line structures are adjacent to each other and are located at the first surface and the second surface respectively, and the projection of the first coupling element of one of the first strip line structures on the reference surface at least partially overlaps with the projection of the first strip line of the other first strip line structure on the reference surface to form the overlapping portion.

15. The radiation unit of claim 14, characterized in that The second strip line structure comprises a second strip line, two second filter strip lines and two second coupling elements, and the second filter strip lines are connected to the second strip line. The projection of the second coupling element of the second strip line structure on the reference surface at least partially overlaps with the projection of the first strip line of the first strip line structure on the reference surface to form the overlapping portion.

16. The radiation unit of any of claims 1-9, wherein, The radiation unit is a dual-polarized radiation unit, the number of filter units is four, and the number of baluns is two.

17. A method of manufacturing a radiating element, characterized by, A method for manufacturing a radiation unit as claimed in any one of claims 1-16, the method comprising: cutting a planar metal plate to form a pre-processed piece, the pre-processed piece comprising a center portion, at least two extension portions extending outward from the center portion, and a connecting metal corresponding to each extension portion; perpendicularly bending each connecting metal relative to the corresponding extension portion to the first side of the thickness direction of the metal plate; at the connection position of each extension portion and the center portion, perpendicularly bending the extension portion relative to the center portion to the first side to make each connecting metal coplanar.

18. An antenna device, characterized by The radiation unit comprises a reflector plate and a radiation unit as claimed in any one of claims 1-16. The baluns of the radiation unit are connected to the reflector plate.

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