Radiating unit, manufacturing method thereof and antenna device

Abstract

The invention relates to a radiation unit, a manufacturing method thereof and an antenna device. The radiation unit comprises a radiation surface and a balun; the radiation surface comprises a support substrate, wherein the support substrate comprises a first surface and a second surface which are oppositely arranged; and at least two filtering units, each filtering unit comprising a connecting metal and a plurality of metal air strip line structures which are arranged on the supporting substrate, and the connecting metal and the plurality of metal air strip line structures are electrically connected in sequence to form a loop-shaped filtering circuit; 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; the balun comprises at least one balun ground, the balun ground is configured to be a sheet metal part and comprises a first part and a second part which are arranged in a spaced mode, and the first part and the second part are connected with the connecting metal in a one-to-one correspondence mode; wherein the supporting substrate is provided with a plurality of hollow parts which are arranged in a penetrating manner, and the supporting substrate is configured to be an insulating part. The antenna unit, the manufacturing method thereof and the antenna device are high in radiation efficiency.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a radiation unit and a manufacturing method thereof, and an antenna device. Background Art

[0002] The radiating unit is the main part of the antenna. It can send and receive electromagnetic waves in a directional manner, thereby realizing wireless communication. As multi-standard fusion antennas and green antennas gradually become the main needs of operators, the filtering characteristics and radiation efficiency characteristics of low-frequency radiating units have become a hot research direction. The radiating surface of the current filtering radiating unit is mostly in the form of PCB. However, the loss caused by the PCB medium will greatly reduce the radiation efficiency of the radiating unit. Summary of the invention

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

[0004] A first aspect of an embodiment of the present application provides a radiation unit, including a radiation surface and a balun;

[0005] The radiating surfaces include:

[0006] A supporting substrate, the supporting substrate comprising a first surface and a second surface arranged opposite to each other; and

[0007] At least two filter units, each filter unit includes a connection metal and a plurality of metal air strip line structures disposed on a support substrate, the connection metal and the plurality of metal air strip line structures are electrically connected in sequence to form a loop-shaped filter circuit; 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;

[0008] 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 that are spaced apart, and the first part and the second part are connected to the connection metal in a one-to-one correspondence;

[0009] A plurality of hollow parts are formed on the support substrate, and the support substrate is configured as an insulating member.

[0010] In one of the embodiments, the balun further includes a feeding element, which is constructed as an air strip line; the feeding element is arranged in a one-to-one correspondence with the balun ground, and forms a microstrip transmission line with the corresponding balun ground.

[0011] In one embodiment, the radiation surface includes a printed circuit board, and the connection metal is disposed on a surface of the printed circuit board;

[0012] The first and second connection ends of the balun ground penetrate the hollow portion of the support substrate and are plugged into corresponding connection metals of the printed circuit board.

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

[0014] In one embodiment, the first portion and the second portion of the balun ground are integrally formed with corresponding connecting metal structures.

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

[0016] In one of the embodiments, the radiation unit further comprises a base, which is located on a side of the balun ground away from the radiation surface;

[0017] The base and the plurality of baluns are constructed as an integrated structure.

[0018] In one embodiment, the radiation unit is a dual-polarization radiation unit, the number of the connection metals is four, and the number of the balun grounds is two; the four connection metals are respectively defined as a first connection metal, a second connection metal, a third connection metal, and a fourth connection metal, and the two balun grounds are respectively defined as a first balun ground and a second balun ground;

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

[0020] When looking down at the radiation unit from one side of the radiation surface, the first connecting metal and the first part of the first balun ground are both located in the first quadrant of the radiation surface, the second connecting metal and the first part of the second balun ground are located in the second quadrant of the radiation surface, the third connecting metal and the second part of the first balun ground are located in the third quadrant of the radiation surface, and the fourth connecting metal and the second part of the second balun ground are located in the fourth quadrant of the radiation surface, wherein the first, second, third and fourth quadrants are divided by orthogonal axes whose two intersections coincide with the center of the radiation surface.

[0021] In one embodiment, the balun further comprises two feeds, the two feeds are respectively defined as a first feed and a second feed, and the two orthogonal axes are defined as a first axis and a second axis;

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

[0023] The first portion of the first balun ground and the second portion of the first balun ground are arranged at intervals along the extension direction of the second axis, so that the first feeder is inserted between the first portion of the first balun ground and the second portion of the first balun ground; and / or

[0024] The first portion of the second balun ground and the second portion of the second balun ground are spaced apart from each other along the extending direction of the first axis, so that the second feeding element is inserted between the first portion of the second balun ground and the second portion of the second balun ground.

[0025] In one embodiment, the metal air strip line structure adjacent to the connection metal is located on the opposite side of the support substrate as the connection metal and is coupled to each other.

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

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

[0028] In one of the embodiments, projections of adjacent connecting metal and metal air strip line structures on a reference plane have overlapping portions so as to be coupled to each other, the projection of the positioning portion on the reference plane is within the setting range of the overlapping portions, and the reference plane is perpendicular to the thickness direction of the supporting substrate.

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

[0030] Two metal air strip line structures electrically connected to each other and respectively located on the first surface and the second surface are connected to the supported substrate by hot melting or snap-fitting with corresponding matching parts.

[0031] In one of the embodiments, projections of two metal air strip line structures adjacent to each other and respectively located on the first surface and the second surface on a reference plane have overlapping portions so as to be coupled to each other; the projection of the mating portion on the reference plane is located within the setting range of the overlapping portion, and the reference plane is perpendicular to the thickness direction of the supporting substrate.

[0032] In one of the embodiments, a portion of the plurality of metal air stripline structures is constructed as a first stripline structure, the first stripline structure comprising a first coupling element, a first filter stripline, and a first stripline connected in sequence;

[0033] In two first stripline structures adjacent to each other and respectively located on the first surface and the second surface, a projection of a first coupling element of one first stripline structure and a first stripline of another first stripline structure on the reference plane at least partially overlap to form an overlapping portion.

[0034] In one embodiment, another part of the plurality of metal air stripline structures is constructed as a second stripline structure, the second stripline structure includes a second stripline, two second filter striplines and two second coupling elements; the two second filter striplines are both connected to the second stripline, and the second filter striplines are connected to the second coupling elements one by one;

[0035] One of the adjacent first and second stripline structures is located on the first surface and the other is located on the second surface, and the second coupling element of the second stripline structure at least partially overlaps with the projection of the first stripline of the first stripline structure on the reference plane to form an overlapping portion.

[0036] In one embodiment, the connection metal and the plurality of metal air strip line structures are alternately arranged on opposite sides of the support substrate in a connection sequence.

[0037] In one embodiment, the support substrate includes an outer frame, and a plurality of ribs connected to the inner side of the outer frame, wherein the plurality of ribs are spaced apart from each other and cross-arranged to form a grid;

[0038] Each connecting metal and metal air strip line structure is correspondingly provided with ribs.

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

[0040] A second aspect of an embodiment of the present application provides a method for manufacturing a radiation unit, which is used to manufacture the radiation unit as described above. The method for manufacturing the radiation unit includes:

[0041] Cutting the flat metal sheet to form a pre-processed part, wherein the pre-processed part includes a central part, at least two extension parts extending outward from the central part, and connecting metals connected to the extension parts in a one-to-one correspondence;

[0042] Bend each connecting metal perpendicularly to a first side in a thickness direction of the metal plate relative to the corresponding extension portion;

[0043] At the connection position between each extension part and the central part, the extension part is bent vertically toward the first side relative to the central part, so that each connection metal is coplanar.

[0044] A third aspect of the embodiments of the present application provides an antenna device, including a reflector and the above-mentioned radiation unit;

[0045] The balun ground of the radiation unit is connected to the reflector.

[0046] Beneficial effects of the above-mentioned radiation unit, manufacturing method thereof, and antenna device:

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

[0048] In addition, part of the metal air stripline structure is located on the first surface, and part of the metal air stripline structure is located on the second surface, which is more flexible in layout. Compared with all the metal air stripline structures being arranged on the same side of the supporting substrate, the radiation unit can also form better filtering characteristics. Furthermore, a plurality of hollow portions are constructed on the supporting substrate, and the supporting substrate is configured as an insulating member. In this way, compared with the case where the entire radiation surface is dielectric, there is no dielectric loss in the area where the hollow portions are arranged, 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 can improve the radiation efficiency of the radiation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the decomposed structure of the radiation unit provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of an exploded structure of another structure of a radiation unit provided in an embodiment of the present application;

[0053] Figure 5 A schematic diagram of a top view of the structure of the connection between the balun ground and the connecting metal in the radiation unit provided in an embodiment of the present application;

[0054] Figure 6 A schematic diagram of the connection of the metal connection, the support substrate and the metal air strip line structure in the radiation unit provided in an embodiment of the present application;

[0055] Figure 7 A schematic diagram of connecting metal, a supporting substrate and a metal air strip line structure in another structure of a radiation unit provided in an embodiment of the present application;

[0056] Figure 8 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application;

[0057] Fig. 9 A schematic diagram of the connection structure between the balun ground and the base in the radiation unit provided in an embodiment of the present application;

[0058] Fig.10 This is a comparison chart of the efficiency of the radiation unit provided in the embodiment of the present application and the radiation unit of the related art.

[0059] Description of Figure Numbers:

[0060] 100. Radiating unit;

[0061] 10. radiating surface; 11. printed circuit board; 111. plug-in slot; 20. supporting substrate; 201. first surface; 202. second surface; 21. hollow portion; 22. positioning portion; 23. matching portion; 24. outer frame; 25. ribs;

[0062] 30. Filter unit;

[0063] 40. connection metal; 41. first connection metal; 42. second connection metal; 43. third connection metal; 44. fourth connection metal;

[0064] 50. Metal air stripline structure; 51. First stripline structure; 511. First filter stripline; 512. First stripline; 513. First coupling element; 52. Second stripline structure; 521. Second stripline; 522. Second filter stripline; 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. connection end; 62. first feeder; 63. second feeder;

[0066] 70. Base;

[0067] 81. Central part; 82. Extended part;

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

[0069] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

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

[0076] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application; Figure 2 A schematic diagram of the decomposed structure of the radiation unit provided in an embodiment of the present application; Figure 3 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application; Figure 4 A schematic diagram of an exploded structure of another structure of a radiation unit provided in an embodiment of the present application; Figure 5 A schematic diagram of a top view of the structure of the connection between the balun ground and the connecting metal in the radiation unit provided in an embodiment of the present application; Figure 6 A schematic diagram of the connection of the metal connection, the support substrate and the metal air strip line structure in the radiation unit provided in an embodiment of the present application; Figure 7 A schematic diagram of connecting metal, a supporting substrate and a metal air strip line structure in another structure of a radiation unit provided in an embodiment of the present application.

[0077] Reference Figure 1 , Figure 2 The radiation unit 100 provided in the embodiment of the present application includes a radiation surface 10 and a balun 60. The radiation surface 10 includes a support substrate 20 and at least two filter units 30. The balun 60 includes at least one balun ground 61.

[0078] The support substrate 20 includes a first surface 201 and a second surface 202 that are arranged opposite to each other. In at least two filter units 30, each filter unit 30 includes a connection metal 40 and a plurality of metal air stripline structures 50 arranged on the support substrate 20, and the connection metal 40 and the plurality of metal air stripline structures 50 are electrically connected in sequence to form a loop-shaped filter circuit. Part of the metal air stripline structure 50 is located on the first surface 201, and part of the metal air stripline structure 50 is located on the second surface 202. The balun ground 61 is configured as a sheet metal part, and the balun ground 61 includes a first part 6110 and a second part 6120 that are arranged at intervals. The first part 6110 and the second part 6120 included in the balun ground 61 can be located in the same polarization direction. And the first part 6110 and the second part 6120 are connected to the connection metal 40 one by one. Among them, a plurality of hollow parts 21 that are arranged through are constructed on the support substrate 20, and the support substrate 20 is configured as an insulating part.

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

[0080] In addition, part of the metal air stripline structure 50 is located on the first surface 201, and part of the metal air stripline structure 50 is located on the second surface 202. The layout is more flexible, and compared with the solution in which all metal air stripline structures are arranged on the same side of the support substrate, the radiation unit 100 can also form a better filtering characteristic. Further, a plurality of hollow portions 21 are configured on the support substrate 20, and the support substrate 20 is configured as an insulating member. In this way, compared with the case where the entire surface of the radiation surface 10 is PCB dielectric, there is no dielectric loss in the area where the hollow portions 21 are arranged, that is, there is no dielectric loss in at least part of the area on the radiation surface 10, which reduces the dielectric loss of the radiation surface 10, and thus can improve the radiation efficiency of the radiation unit 100.

[0081] It can be understood that in the embodiment of the present application, the radiation unit 100 is a dual-polarization radiation unit for example, wherein the number of the filter units 30 is four, the number of the balun grounds 61 is two, and the four filter units 30 are arranged in pairs in mutually orthogonal polarization directions. In the case where the radiation unit 100 is a single-polarization radiation unit, the number of the filter units 30 is two, the number of the balun grounds 61 is one, and the connection of each part in this case is similar to that of the dual-polarization radiation unit, and is not illustrated here.

[0082] The support substrate 20 may be, for example, a plastic part, which is not only light in material but also has good insulation effect. In addition, the connecting metal 40 and the multiple metal air stripline structures 50 are electrically connected in sequence to form a loop-shaped filtering circuit. In some embodiments, the connecting metal 40 and the multiple metal air stripline structures 50 may be connected end to end in sequence to form a loop-shaped filtering circuit. Part of the metal air stripline structure 50 is located on the first surface 201, and part of the metal air stripline structure 50 is located on the second surface 202. This means that among the multiple metal air stripline structures 50, at least part is located on the first surface 201, and at least part is located on the second surface 202. For the metal air stripline structures 50 located on the same surface, they can be directly connected to each other to achieve electrical connection, and for the metal air stripline structures 50 located on different surfaces, they can be connected by coupling through the support substrate 20. Compared with direct connection, the coupling connection method can also make the filtering effect of the radiation unit 100 better.

[0083] In addition, the support substrate 20 is constructed with a number of hollow portions 21 extending therethrough. The size and number of the hollow portions 21 can be set according to actual needs. It can be understood that the larger the area of ​​the hollow portion 21, the more obvious the effect of reducing dielectric loss.

[0084] Further, the balun ground 61 is configured as a sheet metal part, and the first part 6110 and the second part of the balun ground 61 are connected to the corresponding connecting metal 40 in a one-to-one correspondence. For example, Figure 1 , Figure 2 In the two balun grounds 61, the two first parts 6110 and the second parts 6120 are respectively welded and connected to the corresponding connection metal 40 in a one-to-one correspondence. It can be understood that at the welding position between the first part 6110 and the second part 6120 of the balun ground 61 and the connection metal 40, the situation can be partially electroplated to facilitate welding. Alternatively, the balun ground 61 and the connection metal 40 can be electroplated as a whole. In other embodiments, it can be referred to Figure 3 , Figure 4 The first part 6110 and the second part 6120 of the balun ground 61 are integrally formed with the corresponding connection metal 40 in a one-to-one correspondence, which can achieve electroplating-free and save installation process.

[0085] In the embodiment of the present application, Figure 1 , Figure 2 In the solution, the radiation surface 10 includes a printed circuit board 11, and the connection metal 40 is arranged on the surface of the printed circuit board 11. The connection ends 615 of the first part 6110 and the second part 6120 of the balun ground 61 pass through the hollow part 21 of the support substrate 20 and are plugged into the corresponding connection metal 40 of the printed circuit board 11.

[0086] In some embodiments, the printed circuit board 11 is provided with a plugging slot 111 , and the connecting ends 615 are plugged into the plugging slots 111 in a one-to-one correspondence, thereby facilitating the relative positioning of the printed circuit board 11 and the balun ground 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 on the side of the support substrate 20 away from the balun ground 61, that is, the printed circuit board 11 is located on the outermost side of the radiation unit 100, which facilitates the welding operation between the balun ground 61 and the printed circuit board 11. Of course, the connection metal 40 can be located on the surface of the printed circuit board 11 away from the support substrate 20, so as to facilitate the operator to weld the connection metal 40 and the balun ground 61.

[0088] exist Figure 3 , Figure 4 In the radiation unit 100 of another structure shown, the first part 6110 and the second part 6120 of the balun ground 61 are constructed as an integral structure with the corresponding connection metal 40. In this way, the electrical connection between the connection metal 40 and the balun ground 61 can be achieved without electroplating. For the dual-polarized radiation unit, the number of the balun grounds 61 is two, the number of the first part 6110 and the second part 6120 is four, and the corresponding connection metals 40 are also four. When the first part 6110 and the second part 6120 of the balun ground 61 are constructed as an integral structure with the corresponding connection metal 40, the four integral structures as described above can be arranged spaced from each other.

[0089] Further, in Figure 3 , Figure 4 In the solution, the connection metal 40 is located on the second surface 202 of the support substrate 20. This arrangement facilitates the support substrate 20 to be mounted on the side of the connection metal 40 away from the balun ground 61.

[0090] Continue to refer to Figure 3 and Figure 4 The radiation unit 100 further includes a base 70 , which is located on a side of the balun ground 61 away from the radiation surface 10 , and the base 70 and the plurality of balun grounds 61 are constructed as an integrated structure.

[0091] In a specific implementation, when the radiation unit 100 is a dual-polarization radiation unit, the number of the connection metals 40 and the number of the balun grounds 61 are both two. The four connection metals 40 are respectively defined as a first connection metal 41, a second connection metal 42, a third connection metal 43 and a fourth connection metal 44, and the two balun grounds 61 are respectively defined as a first balun ground and a second balun ground.

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

[0093] Combination Figure 3 and Figure 5 (For ease of observation, each balun ground is shown with a section line), when the radiation unit 100 is looked down at from the side of the radiation surface 10, that is, when the radiation unit 100 is observed 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 both located in the first quadrant of the radiation surface 10, the second connecting metal 42 and the first part 612 of the second balun ground are located in the 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 the 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 the fourth quadrant of the radiation surface 10, wherein the first, second, third and fourth quadrants are divided by orthogonal axes whose two intersections 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 the two are located in one 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 the two are located in another polarization direction.

[0095] In the embodiment of the present application, the balun 60 also includes a feeder, which is configured as an air strip line. The feeder can be arranged in a one-to-one correspondence with the balun ground 61, and form a microstrip line transmission line with the corresponding balun ground 61. Exemplarily, when the radiation unit 100 is a dual-polarization radiation unit, the number of feeders can be two, and the two feeders can be defined as a first feeder 62 and a second feeder 63, respectively, and the two orthogonal axes are 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 the 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 the second polarization direction, and the first polarization direction and the second polarization direction are orthogonal.

[0096] The first portion 611 of the first balun ground and the second portion 613 of the first balun ground are arranged at intervals along the extension direction of the second axis S, so that the first feeder 62 is inserted between the first portion 611 of the first balun ground and the second portion 613 of the first balun ground. Further, the first portion 612 of the second balun ground and the second portion 614 of the second balun ground are arranged at intervals along the extension direction of the first axis F, so that the second feeder 63 is inserted between the first portion 612 of the second balun ground and the second portion 614 of the second balun ground.

[0097] In a specific implementation, there is a gap between the first feed 62 and the first portion 611 of the first balun ground and the second portion 613 of the first balun ground, so that the first feed 62 is coupled to the first portion 611 of the first balun ground and the second portion 613 of the first balun ground. There is a gap between the second feed 63 and the first portion 612 of the second balun ground and the second portion 614 of the second balun ground, so that the second feed 63 is coupled to the first portion 612 of the second balun ground and the second portion 614 of the second balun ground.

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

[0099] In the present application embodiment, combined Figure 6 and Figure 7 The metal air strip line structure 50 adjacent to the connection metal 40 is located on the opposite side of the support substrate 20 from the connection metal 40 and is coupled to each other.

[0100] For example, in Figure 6 In the example of FIG. 1 , the connection metal 40 is located on the first surface 201 of the support substrate 20 , and the metal air strip line structure 50 adjacent to the connection metal 40 is located on the second surface 202 of the support substrate 20 . Figure 7 In the example, the connection metal 40 is located on the second surface 202 of the support substrate 20 , and the metal air strip line structure 50 adjacent to the connection metal 40 is located on the first surface 201 of the support substrate 20 .

[0101] In some embodiments, reference Figure 6 and Figure 7 The first surface 201 and the second surface 202 of the support substrate 20 are both provided with positioning parts 22. The connection metal 40 and the metal air strip line structure 50 coupled to each other are connected to the support substrate 20 through the corresponding positioning parts 22 by means of hot melting or snap fitting.

[0102] Exemplarily, a through hole is provided at a position corresponding to the connection metal 40 and the positioning portion 22 , and a through hole is also provided at a position corresponding to the metal air strip line structure 50 and the positioning portion 22 . The positioning portion 22 is connected to the connection metal 40 and the metal air strip line structure 50 through the above-mentioned through hole.

[0103] Further, the projections of the adjacent connection metal 40 and the metal air stripline structure 50 on the reference plane have an overlapping portion, so that the two can be coupled and connected via the support substrate 20, and the projection of the positioning portion 22 on the reference plane is located within the setting range of the overlapping 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 connection metal 40 and the metal air stripline structure 50 can be kept constant.

[0104] In the present application, continue to refer to Figure 6 and Figure 7 The first surface 201 and the second surface 202 of the supporting substrate 20 are both provided with a matching portion 23. The two metal air strip line structures 50 electrically connected to each other and respectively located on the first surface 201 and the second surface 202 are connected to the supported substrate 20 by hot melting or snapping with the corresponding matching portions 23.

[0105] Further, the projections of the two metal air strip line structures 50 adjacent to each other and respectively located on the first surface 201 and the second surface 202 on the reference plane have overlapping parts. In this way, the two can be coupled and connected. The projection of the matching portion 23 on the reference plane is located within the setting range of the overlapping part, 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 coupled to each other are parallel to each other and have a preset distance in the thickness direction of the support substrate 20. The preset distance may correspond to the thickness dimension of the support substrate 20, for example.

[0107] In some embodiments, continue to refer to Figure 6 and Figure 7 Among the multiple metal air stripline structures 50, some are constructed as a first stripline structure 51, and the first stripline structure 51 includes a first coupling element 513, a first filter stripline 511, and a first stripline 512 connected in sequence.

[0108] In two first strip line structures 51 adjacent to each other and respectively located on the first surface 201 and the second surface 202, the first coupling element 513 of one first strip line structure 51 at least partially overlaps with the first strip line 512 of the other first strip line structure 51 in projection on the reference plane to form an overlapping portion, and are coupled and connected via the supporting substrate 20.

[0109] In other embodiments, another part of the plurality of metal air stripline structures 50 is constructed as a second stripline structure 52, and the second stripline structure 52 includes a second stripline 521, two second filter striplines 522, and two second coupling elements 523. The two second filter striplines 522 are both connected to the second stripline 521, and the second filter striplines 522 are connected to the second coupling elements 523 in a one-to-one correspondence.

[0110] Among the first strip line structure 51 and the second strip line structure 52 adjacent to each other, one is located on the first surface 201 and the other is located on the second surface 202, and the second coupling element 523 of the second strip line structure 52 at least partially overlaps with the projection of the first strip line 512 of the first strip line structure 51 on the reference plane to form an overlapping portion, and the two are coupled and connected.

[0111] Furthermore, combined 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 sequentially arranged alternately on opposite sides of the support substrate 20 according to the connection sequence. In some embodiments, the structures of the filter units 30 are the same and are arranged symmetrically with respect to the center of the radiation surface 10.

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

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

[0114] In the filter unit 30, the number of the connection metal 40 and the second stripline structure 52 are both one, and the number of the first stripline structure 51 is an even number, for example, the number of the first stripline structure 51 is four. Figure 6 and Figure 7 In the example, a symmetrical filter circuit is formed in a filter unit 30, and in one branch, the number of the first filter strip line 511 and the second filter strip line 522 is three, so the filter unit 30 is a 3-stage filter structure. In some other embodiments, the number of the first filter strip line 511 and the second filter strip line 522 in a branch can also be other, but this number is also the number of stages of the filter structure. Here, the number of stages of the filter structure can be set according to actual needs, for example, it can be 4 levels, 5 levels, etc.

[0115] Reference 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 spaced apart and cross-arranged to form a grid. Each connection metal 40 and metal air stripline structure 50 is provided with a corresponding rib 25. The width of the rib 25 can be smaller than the corresponding metal air stripline 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 stripline structure 50.

[0116] In an embodiment of the present application, an antenna device is further provided. The antenna device includes a reflector and the above-mentioned radiation unit 100 . The balun ground 61 of the radiation unit 100 is connected to the reflector through a base 70 .

[0117] Figure 8 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application; Fig. 9 A schematic diagram of the connection structure between the balun ground and the base in the radiation unit provided in an embodiment of the present application.

[0118] Combination Figure 8 and Fig. 9 The embodiment of the present application further provides a method for manufacturing a radiation unit, which is used to manufacture the radiation unit 100, and the method includes:

[0119] S10, cutting the flat metal plate to form a pre-processed part, the pre-processed part includes a central part 81, at least two extension parts 82 extending outward from the central part 81, and connecting metals 40 connected to the extension parts 82 in a one-to-one correspondence.

[0120] S20 , vertically bending each connection metal 40 relative to the corresponding extension portion 82 toward a first side in the thickness direction of the metal plate.

[0121] S30 , at the connection position between each extension portion 82 and the central portion 81 , bend the extension portion 82 vertically toward the first side relative to the central portion 81 , so that each connection metal 40 is coplanar.

[0122] In the radiation unit 100 manufactured by the above method, because it is formed by bending the same flat metal plate, there is no need for many PCB solder joints. Also, because of the hardness of the metal itself, it can support the connecting metal 40, the balun ground 61 and the base 70, eliminating the problem of using plastic parts for support in traditional PCB units, saving the number of components, simplifying assembly and welding, and improving the efficiency of the radiation unit. At the same time, because the connecting 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 may be further included.

[0124] Fig.10 This is a comparison chart of the efficiency of the radiation unit provided in the embodiment of the present application and the radiation unit of the related art. The radiation unit in the related art adopts the form of PCB. Fig.10 In the figure, the horizontal axis is the operating frequency of the radiation unit, and the vertical axis is the radiation efficiency value. Fig.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 within its operating frequency band (roughly within the range of 690 GHz-960 GHz).

[0125] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radiation unit, characterized in that: Including radiating surface and balun; The radiating surface comprises: a supporting substrate, the supporting substrate comprising a first surface and a second surface disposed opposite to each other; and At least two filter units, each of the filter units comprises a connection metal and a plurality of metal air strip line structures provided on the support substrate, the connection metal and the plurality of metal air strip line structures are electrically connected in sequence 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, the balun ground is configured as a sheet metal part, and includes a first part and a second part that are spaced apart, the first part and the second part are connected to the connection metal in a one-to-one correspondence; Wherein, the support substrate is configured with a plurality of hollow portions penetrating therethrough, and the support substrate is configured as an insulating member.

2. The radiation unit according to claim 1, characterized in that: The balun further comprises a feeder, wherein the feeder is configured as an air strip line; The feeding element is arranged in one-to-one correspondence with the balun ground, and forms a microstrip transmission line with the corresponding balun ground.

3. The radiation unit according to claim 1, characterized in that: The radiation surface includes a printed circuit board, and the connection metal is arranged on the surface of the printed circuit board; The connection ends of the first part and the second part of the balun ground pass through the hollow portion of the support substrate and are plugged into the corresponding connection metals of the printed circuit board.

4. The radiation unit according to claim 3, characterized in that: The printed circuit board is located on the first surface of the supporting substrate.

5. The radiation unit according to claim 1, characterized in that: The first part and the second part of the balun ground are integrally formed with the corresponding connecting metal structure.

6. The radiation unit according to claim 5, characterized in that: The connection metal is located on the second surface of the support substrate.

7. The radiation unit according to claim 5, characterized in that: The radiation unit further includes a base, and the base is located on a side of the balun ground away from the radiation surface; The base and the balun are constructed as an integrated structure.

8. The radiation unit according to claim 5, characterized in that: The radiation unit is a dual-polarization radiation unit, the number of the connection metals is four, and the number of the balun grounds is two; the four connection metals are respectively defined as a first connection metal, a second connection metal, a third connection metal, and a fourth connection metal, and the two balun grounds are respectively defined as a first balun ground and a second balun ground; The first connection metal, the second connection metal, the third connection metal and the fourth connection metal are respectively and integrally connected to the first part of the first balun ground, the first part of the second balun ground, the second part of the first balun ground and the second part of the second balun ground; When looking down at the radiation unit from one side of the radiation surface, the first connecting metal and the first part of the first balun ground are both located in the first quadrant of the radiation surface, the second connecting metal and the first part of the second balun ground are located in the second quadrant of the radiation surface, the third connecting metal and the second part of the first balun ground are located in the third quadrant of the radiation surface, and the fourth connecting metal and the second part of the second balun ground are located in the fourth quadrant of the radiation surface, wherein the first, second, third and fourth quadrants are divided by orthogonal axes whose two intersections coincide with the center of the radiation surface.

9. The radiation unit according to claim 8, characterized in that: The balun further comprises two feeds, the two feeds are respectively defined as a first feed and a second feed, and the two orthogonal axes are defined as a first axis and a second axis; The first part of the first balun ground and the second part of the first balun ground are located in a first polarization direction, the first part of the second balun ground and the second part of the second balun ground are located in a second polarization direction, and the first polarization direction and the second polarization direction are orthogonal; The first portion of the first balun ground and the second portion of the first balun ground are arranged at intervals along the extension direction of the second axis, so that the first feeder is inserted between the first portion of the first balun ground and the second portion of the first balun ground; and / or The first portion of the second balun ground and the second portion of the second balun ground are spaced apart from each other along the extending direction of the first axis, so that the second feeding element is inserted between the first portion of the second balun ground and the second portion of the second balun ground.

10. The radiation unit according to any one of claims 3 to 9, characterized in that: The metal air strip line structure adjacent to the connection metal is located on the opposite side of the support substrate as the connection metal, and they are coupled to each other.

11. The radiation unit according to claim 10, characterized in that: The first surface and the second surface of the support substrate are both provided with positioning parts; The connection metal and the metal air strip line structure coupled to each other are respectively connected to the support substrate through the corresponding positioning parts by means of hot melting or snap fitting.

12. The radiation unit according to claim 11, characterized in that: The projections of the adjacent connecting metal and the metal air strip line structure on the reference plane have overlapping parts to couple with each other, and the projection of the positioning part on the reference plane is located within the setting range of the overlapping parts, and the reference plane is perpendicular to the thickness direction of the supporting substrate.

13. The radiation unit according to any one of claims 1 to 9, characterized in that: The first surface and the second surface of the support substrate are both provided with a matching portion; The two metal air strip line structures electrically connected to each other and respectively located on the first surface and the second surface are connected to the supported substrate by hot melting or snap-fitting with the corresponding matching parts.

14. The radiation unit according to claim 13, characterized in that: Projections of two metal air strip line structures adjacent to each other and located on the first surface and the second surface respectively on the reference plane have overlapping parts so as to be coupled and connected to each other; A projection of the matching portion on the reference plane is located within a setting range of the overlapping portion, and the reference plane is perpendicular to a thickness direction of the support substrate.

15. The radiation unit according to claim 14, characterized in that: 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.

16. The radiation unit according to claim 14, characterized in that: Among the plurality of metal air stripline structures, part is constructed as a first stripline structure, wherein the first stripline structure comprises a first coupling element, a first filter stripline and a first stripline connected in sequence; In two first stripline structures adjacent to each other and respectively located on the first surface and the second surface, the first coupling element of one first stripline structure at least partially overlaps with a projection of the first stripline of another first stripline structure on the reference plane to form the overlapping portion.

17. The radiation unit according to claim 16, characterized in that: Another portion of the plurality of metal air stripline structures is constructed as a second stripline structure, the second stripline structure comprising a second stripline, two second filter striplines and two second coupling elements; The two second filter strip lines are both connected to the second strip line, and the second filter strip lines are connected to the second coupling elements in a one-to-one correspondence; Among the first stripline structure and the second stripline structure adjacent to each other, one is located on the first surface and the other is located on the second surface, and the second coupling element of the second stripline structure at least partially overlaps with the projection of the first stripline of the first stripline structure on the reference plane to form the overlapping portion.

18. The radiation unit according to any one of claims 1 to 9, characterized in that: The connection metal and the plurality of metal air strip line structures are alternately arranged on opposite sides of the support substrate in a connection sequence.

19. The radiation unit according to any one of claims 1 to 9, characterized in that: The support substrate includes an outer frame, and a plurality of ribs connected to the inner side of the outer frame, wherein the plurality of ribs are spaced apart from each other and cross-arranged to form a grid shape; Each of the connecting metals and the metal air strip line structure is correspondingly provided with the ribs.

20. The radiation unit according to any one of claims 1 to 9, characterized in that: The radiation unit is a dual-polarization radiation unit, the number of the filter units is four, the number of the baluns is two, and the four filter units are arranged in pairs in mutually orthogonal polarization directions.

21. A method for manufacturing a radiation unit, characterized in that: Used to manufacture a radiation unit according to any one of claims 1 to 20, wherein the manufacturing method of the radiation unit comprises: Cutting a flat metal plate to form a pre-processed part, wherein the pre-processed part includes a central part, at least two extension parts extending outward from the central part, and connecting metals connected to the extension parts in a one-to-one correspondence; Bend each of the connecting metals perpendicularly to a first side in a thickness direction of the metal plate relative to the corresponding extending portion; At the connection position between each of the extension parts and the central part, the extension part is bent vertically toward the first side relative to the central part, so that each of the connection metals is coplanar.

22. An antenna device, characterized in that: A reflector comprising a reflector and a radiation unit as claimed in any one of claims 1 to 20; The balun ground of the radiation unit is connected to the reflection plate.

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