Radiating element and antenna device

Abstract

The present application relates to a kind of radiation unit and antenna device.Radiation unit includes radiation surface and balun;Radiation surface includes: support substrate;And at least two filter units are arranged in support substrate, each filter unit includes connecting metal and multiple metal air strip structure, connecting metal and multiple metal air strip structure are sequentially electrically connected to form loop-shaped filter circuit;Part of metal air strip structure is located at first surface, part of metal air strip structure is located at second surface;Balun includes: support shell, is connected to the second surface of support substrate;And at least one feed balun, is connected to support shell, the ground layer of feed balun is correspondingly electrically connected with two connecting metals located in the same polarization direction;Wherein, support substrate is configured with several hollow parts arranged through, and support substrate is configured as insulating piece.Radiation unit and antenna device in the present application have small loss, high efficiency, and have good filtering characteristics.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a radiation unit 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 and an antenna device with high radiation efficiency.

[0004] The present application provides a radiation unit, which comprises 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 arranged on the support substrate, each filtering unit comprising a connecting metal and a plurality of metal-air strip line structures, 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:

[0009] a support shell connected to the second surface of the support substrate; and

[0010] at least one feeding balun connected to the support shell, the feeding balun being configured as a microstrip transmission line, and the ground layer of the feeding balun being electrically connected to the two connecting metals located in the same polarization direction;

[0011] In the present application, a plurality of hollow parts are arranged through the support substrate, and the support substrate is configured as an insulating member.

[0012] In one embodiment, the first surface and the second surface of the support substrate are each provided with a matching part.

[0013] The two metal-air strip line structures, which are electrically connected to each other and located on the first surface and the second surface respectively, are connected to the support substrate by hot melting or clamping with the corresponding matching parts.

[0014] In one embodiment, the projections of two adjacent metal air strip structures located on the first and second surfaces, respectively, onto the reference plane have overlapping portions, so as to couple and connect with each other.

[0015] The projection of the mating part onto the reference surface is located within the setting range of the overlapping portion, and the reference surface is perpendicular to the thickness direction of the support substrate.

[0016] In one embodiment, two metal air strip structures coupled to each other are parallel to each other and have a predetermined spacing in the thickness direction of the supporting substrate.

[0017] In one embodiment, among the plurality of metal-air strip structures, a portion is configured as a first strip structure, the first strip structure including a first filter strip, a first strip line and a first coupling element connected in sequence;

[0018] In two first strip structures that are adjacent to each other and located on a first surface and a second surface respectively, the first coupling element of one first strip structure at least partially overlaps the projection of the first strip of the other first strip structure onto a reference surface to form an overlapping portion.

[0019] In one embodiment, among the plurality of metal-air strip structures, another portion is constructed as a second strip structure, which includes a second strip line, two second filter strip lines, and two second coupling elements.

[0020] Both second filter strips are connected to the second strip line, and each second filter strip is connected to a second coupling element.

[0021] In the first and second strip structures that are adjacent to each other, one is located on the first surface and the other is located on the second surface. The second coupling element of the second strip structure at least partially overlaps with the projection of the first strip of the first strip structure on the reference plane to form an overlapping portion.

[0022] In one embodiment, the filtering unit has one connecting metal and one second strip structure, and the number of the first strip structure is an even number.

[0023] The connecting metal is located on the first surface of the supporting substrate;

[0024] The connecting metal, the first strip structure, and the second strip structure in the filter unit are arranged alternately on opposite sides of the support substrate in the order of connection.

[0025] In one embodiment, in the adjacent connecting metal and metal-air strip structures, one is located on a first surface and the other is located on a second surface;

[0026] The metal air strip structure is coupled to the connecting metal.

[0027] In one embodiment, both the first and second surfaces of the support substrate are provided with positioning portions;

[0028] The metal air strip structure and connecting metal coupled to each other are connected to the support substrate by means of hot melting or snap-fit ​​through corresponding positioning parts;

[0029] The positioning part is located at the coupling point between the metal air strip structure and the connecting metal.

[0030] In one embodiment, the connecting metal structure is a metal air strip;

[0031] Alternatively, the radiating surface may include a printed circuit board, with connecting metal disposed on the surface of the printed circuit board.

[0032] In one embodiment, the connecting end of the feed balun facing the radiation surface passes through the cutout of the support substrate and is inserted into the corresponding connecting metal.

[0033] In one embodiment, the support substrate includes an outer frame and a plurality of ribs connected to the inner side of the outer frame, the plurality of ribs being spaced apart from each other and intersecting to form a grid.

[0034] In one embodiment, each connecting metal and metal-air strip structure is provided with corresponding ribs.

[0035] In one embodiment, the radiating element is a dual-polarized radiating element, the number of filtering elements is four, the number of feeding baluns is two, and the filtering elements are arranged in pairs in mutually orthogonal polarization directions.

[0036] In one embodiment, the support shell and the support substrate are constructed as a single unit.

[0037] In one embodiment, the radiating unit further includes a base, to which the side of the feed balun away from the radiating surface is connected, and the base is connected to a support shell.

[0038] This application also provides an antenna device, including a reflector and the above-described radiating element;

[0039] The supporting shell of the radiating unit is connected to the reflector.

[0040] The beneficial effects of the above-mentioned radiating element and antenna device are as follows:

[0041] By providing a support shell and connecting it to the second surface of a support substrate, and placing the filter unit on the support substrate, the support substrate and the filter unit can be supported and positioned simply by fixing the support shell to an external mounting component, such as a reflector. At least one feed balun is connected to the support shell, thus enabling relative positioning of the feed balun with respect to the support substrate and the filter unit.

[0042] Furthermore, some metal air strip structures are located on the first surface, and some are located on the second surface, allowing for more flexible layout. Compared to a scheme where all metal air strip structures are located on the same side of the support substrate, this also enables the radiating unit to achieve better filtering characteristics. Moreover, the support substrate has several through-holes, and the support substrate is configured as an insulating component. Thus, compared to a radiating surface where the entire surface is PCB dielectric, the areas with the through-holes have no dielectric loss; that is, at least a portion of the radiating surface has no dielectric loss. This reduces the dielectric loss of the radiating surface and therefore improves the radiation efficiency of the radiating unit. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the radiating unit provided in an embodiment of this application;

[0044] Figure 2 This is an exploded structural diagram of a radiating element provided in an embodiment of this application;

[0045] Figure 3 A schematic diagram of another structure of the radiating unit provided in an embodiment of this application;

[0046] Figure 4 An exploded structural diagram of another structure of the radiating unit provided in an embodiment of this application;

[0047] Figure 5 A top view schematic diagram showing the connection relationship between the connecting metal and the metal-air strip structure in the radiating unit provided in the embodiment of this application;

[0048] Figure 6 A schematic diagram illustrating the connection relationship between the connecting metal and the metal-air strip structure in the radiating unit provided in the embodiments of this application;

[0049] Figure 7 An exploded structural diagram showing the connection relationship between the connecting metal and the metal-air strip structure in the radiating unit provided in the embodiment of this application;

[0050] Figure 8 A comparison chart of the efficiency of the radiating unit provided in the embodiments of this application and the radiating units of related technologies.

[0051] Explanation of icon numbers:

[0052] 100. Radiation unit;

[0053] 10. Radiation surface; 11. Printed circuit board; 111. Insertion slot; 112. Through slot; 20. Support substrate; 201. First surface; 202. Second surface; 21. Cutout; 22. Positioning part; 221. Second through hole; 23. Mating part; 231. First through hole; 24. Outer frame; 241. First square frame structure; 242. Second square frame structure; 25. Rib; 243. Ring frame structure;

[0054] 30. Filtering unit;

[0055] 40. Connecting metals;

[0056] 50. Metal-air strip structure; 51. First strip structure; 511. First filter strip; 512. First stripline; 513. First coupling element; 52. Second strip structure; 521. Second stripline; 522. Second filter strip; 523. Second coupling element;

[0057] 60. Balun; 61. Support shell; 62. Feed balun; 620. Ground layer; 621. Connection end; 622. Feed metal; 623. Dielectric plate;

[0058] 70. Base. Detailed Implementation

[0059] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] 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.

[0065] The radiating element and antenna device of the present application are described below with reference to the accompanying drawings.

[0066] 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 schematic diagram showing the connection relationship between the connecting metal and the metal-air strip structure in the radiating unit provided in the embodiment of this application; Figure 6 A schematic diagram illustrating the connection relationship between the connecting metal and the metal-air strip structure in the radiating unit provided in the embodiments of this application; Figure 7 This is an exploded structural diagram showing the connection relationship between the connecting metal and the metal-air strip structure in the radiation unit provided in the embodiment of this application.

[0067] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The radiation unit 100 provided in this application embodiment includes a radiation surface 10 and a balun 60.

[0068] The radiating surface 10 includes a supporting substrate 20 and at least two filtering units 30 disposed on the supporting substrate 20. The supporting substrate 20 includes a first surface 201 and a second surface 202 disposed opposite to each other. Each of the at least two filtering units 30 includes a connecting metal 40 and a plurality of metal air strip structures 50, which are sequentially electrically connected to form a loop-shaped filtering circuit. Some of the metal air strip structures 50 are located on the first surface 201, and some are located on the second surface 202.

[0069] The balun 60 includes a support shell 61 and at least one feed balun 62. The support shell 61 is connected to the second surface 202 of the support substrate 20. The feed balun 62 is connected to the support shell 61 and is configured as a microstrip line transmission line. The ground layer 620 of the feed balun 62 is electrically connected to two connecting metals 40 located in the same polarization direction. The support substrate 20 has a plurality of through-holes 21 and is configured as an insulating element.

[0070] By providing a support shell 61 and connecting it to the second surface 202 of the support substrate 20, and by placing the filter unit 30 on the support substrate 20, the support substrate 20 and the filter unit 30 can be supported and positioned simply by fixing the support shell 61 to an external mounting component, such as a reflector. The power supply balun 62 is connected to the support shell 61, thus enabling relative positioning of the power supply balun 62 with respect to the support substrate 20 and the filter unit 30.

[0071] Furthermore, some of the metal air strip structures 50 are located on the first surface 201, and some are located on the second surface 202, allowing for more flexible layout. Compared to a scheme where all metal air strip structures are located on the same side of the support substrate, this also enables the radiation unit 100 to achieve better filtering characteristics. Further, the support substrate 20 has several through-holes 21, and the support substrate 20 is configured as an insulating component. Thus, compared to the case where the entire radiation surface 10 is PCB dielectric, the areas where the through-holes 21 are located have no dielectric loss; that is, at least a portion of the radiation surface 10 has no dielectric loss. This reduces the dielectric loss of the radiation surface 10 and therefore improves the radiation efficiency of the radiation unit 100.

[0072] It is understood that in this embodiment, the radiating element 100 is described as a dual-balun radiating element, wherein there are four filter elements 30 and two feed baluns 62, and the four filter elements 30 are arranged in pairs in mutually orthogonal polarization directions. In the case where the radiating element 100 is a single-balun radiating element, there are four filter elements 30 and one feed balun 62. The connection of each part in this case is similar to that of the dual-balun radiating element, and will not be illustrated here.

[0073] The support substrate 20 is made of plastic. The connecting metal 40 and the multiple metal air strip structures 50 can be coupled in pairs to form a filter circuit. In some embodiments, the connecting metal 40 and the multiple metal air strip structures 50 can be connected end to end to form a ring-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 coupling connection method, compared to direct connection, also results in better filtering performance of the radiation unit 100.

[0074] In addition, the support substrate 20 has a number of through-hole portions 21. The area 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.

[0075] Furthermore, referring to Figure 2The feed balun 62 can be configured as a printed circuit board. The feed balun 62 includes a dielectric substrate 623, a ground layer 620, and a feed metal 622. The ground layer 620 can be disposed on the back side of the dielectric substrate 623, and the feed metal 622 can be disposed on the front side of the dielectric substrate 623. The end of each feed balun 62 facing the radiating surface 10 is defined as a connection end 621. The ground layer 620 also extends to the connection end 621 to facilitate corresponding connection with the corresponding connection metal 40. Thus, the two connection ends 621 of the feed balun 62 can be soldered one-to-one with the two connection metals 40 in one polarization direction. It is understood that the soldering locations between the feed balun 62 and the connection metal 40 can be partially electroplated to facilitate soldering. Alternatively, both the feed balun 62 and the connection metal 40 can be electroplated entirely.

[0076] In the embodiments of this application, Figure 1 , Figure 2 In this design, 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 two connecting ends 621 of the power supply balun 62 pass through the cutout portion 21 of the support substrate 20 and are inserted into the corresponding connecting metal 40 of the printed circuit board 11.

[0077] In some embodiments, the printed circuit board 11 is provided with a plug slot 111, and the connection end 621 is plugged into the plug slot 111 in a one-to-one correspondence, thereby facilitating the relative positioning of the printed circuit board 11 and the power supply balun 62.

[0078] Furthermore, the printed circuit board 11 is located on the first surface 201 of the support substrate 20. This places the printed circuit board 11 on the side of the support substrate 20 opposite to the feed balun 62, i.e., on the outermost side of the radiating unit 100, facilitating soldering operations between the feed balun 62 and the printed circuit board 11. Of course, the connecting metal 40 can be located on the surface of the printed circuit board 11 opposite to the support substrate 20, thereby facilitating soldering of the connecting metal 40 to the feed balun 62 by the operator.

[0079] exist Figure 3 , Figure 4 In another structure of the radiating unit 100 shown, the connecting metal 40 is constructed as a metal-air strip, and the connecting metal 40 can be located on the first surface 201 of the supporting substrate 20. Figure 1 , Figure 2 Similarly, this arrangement facilitates the welding of the connecting metal 40 to the power supply balun 62. Furthermore, the two connecting ends 621 of the power supply balun 62 penetrate the cutout portion 21 of the support substrate 20 and are inserted into the corresponding connecting metal 40. Through slots 112 can be provided on the connecting metal 40 to allow the connecting ends 621 to be inserted one by one.

[0080] Furthermore, the connecting metal 40 is located on the first surface 201 of the support substrate 20. This arrangement facilitates the installation of the support substrate 20. Of course, in practical applications, the connecting metal 40 or the printed circuit board 11 can also be located on the second surface 202 of the support substrate 20.

[0081] Continue to refer to Figure 2 and Figure 4 The radiating unit 100 also includes a base 70, to which the side of the feed balun 62 facing away from the radiating surface 10 is connected. The base 70 is connected to the support housing 61. Specifically, the base 70 can be positioned onto the support housing 61 using components such as plastic clips. The base 70 can be in the form of a printed circuit board.

[0082] Furthermore, the support shell 61 has a cavity for housing, and the power supply balun 62 is housed within the cavity of the support shell 61. Since one end of the power supply balun 62 is connected to the connecting metal 40 and the other end is connected to the base 70, and the base 70 is connected to the support shell 61, the power supply balun 62 can be fixed relative to the support shell 61.

[0083] In this embodiment of the application, combined with Figure 5 , Figure 6 , Figure 7 ,exist Figure 5 In the image, for ease of observation, the metal air strip structure 50 disposed on the second surface 202 of the support substrate 20 is represented by dashed lines.

[0084] Furthermore, both the first surface 201 and the second surface 202 of the support substrate 20 are provided with mating portions 23.

[0085] Two metal air strip structures 50, which are electrically connected to each other and located on the first surface 201 and the second surface 202 respectively, are connected to the support substrate 20 by thermal fusion or snap-fit ​​with the corresponding mating part 23.

[0086] The mating part 23 can be a columnar structure integrally formed on the support substrate 20. The end of the mating part 23 is provided with a partially enlarged neck. The metal air strip structure 50 is provided with a first through hole 231 corresponding to the position of the mating part 23. After the mating part 23 is inserted into the corresponding first through hole 231, the partially enlarged neck at the end of the mating part 23 engages with the edge of the opening of the first through hole 231, thereby positioning the metal air strip structure 50 relative to the support substrate 20.

[0087] Combination Figure 5Two adjacent metal air strip structures 50, located on the first surface 201 and the second surface 202 respectively, have overlapping projections on the reference plane, allowing them to be coupled together. The projection of the mating portion 23 on the reference plane lies within the overlapping portion, wherein the reference plane is perpendicular to the thickness direction of the support substrate 20; exemplarily, the reference plane may be parallel to the first surface 201 and the second surface 202. This allows the two metal air strip structures 50 to be coupled together. The fact that the projection of the mating portion 23 on the reference plane lies within the overlapping portion makes the coupling gap between the two metal air strip structures 50 more stable.

[0088] In addition, the two metal air strip structures 50 coupled to each other are parallel to each other and have a preset spacing in the thickness direction of the supporting substrate 20, so as to realize the coupling of the two metal air strip structures 50.

[0089] In some embodiments, combined with Figure 5 and Figure 7 Among the multiple metal air strip structures 50, a portion is constructed as a first strip structure 51. The first strip structure 51 includes a first filter strip 511, a first strip line 512, and a first coupling element 513 connected in sequence.

[0090] In two adjacent first strip structures 51 located on the first surface 201 and the second surface 202 respectively, the first coupling element 513 of one first strip structure 51 at least partially overlaps with the projection of the first strip line 512 of the other first strip structure 51 onto the reference plane to form an overlapping portion. This allows the two first strip structures 51 to be coupled together.

[0091] In some other embodiments, reference continues to be made to... Figure 5 and Figure 7 Among the multiple metal air strip structures 50, another part is constructed as a second strip structure 52, which includes a second strip line 521, two second filter strip lines 522 and two second coupling elements 523.

[0092] Both second filter strips 522 are connected to the second strip line 521, and each second filter strip 522 is connected to a second coupling element 523.

[0093] In the adjacent first strip structure 51 and second strip structure 52, one is located on the first surface 201 and the other is located on the second surface 202. The second coupling element 523 of the second strip structure 52 at least partially overlaps with the projection of the first strip line 512 of the first strip structure 51 onto the reference plane to form an overlapping portion. In this way, the coupling connection between the first strip structure 51 and the second strip structure 52 can be achieved.

[0094] Furthermore, in the filter unit 30, there is one connecting metal 40 and one second strip structure 52, and an even number of first strip structures 51. The connecting metal 40 is located on the first surface 201 of the support substrate 20 to facilitate the welding operation of the connecting metal 40 and the power supply balun 62.

[0095] Furthermore, the connecting metal 40, the first strip structure 51, and the second strip structure 52 in the filter unit 30 are arranged alternately on opposite sides of the support substrate 20 in the order of connection.

[0096] For example, in Figure 1 , Figure 5 In the example, with located Figure 5 Taking the filter unit 30 in the lower left corner as an example, the connecting metal 40 is located on the first surface 201, the two first strip structures 51 adjacent to the connecting metal 40 are located on the second surface 202, the two next-to-next first strip structures 51 are located on the first surface 201, and the second strip structure 52 is located on the second surface 202. It should be noted that all filter units 30 on the radiating surface 10 have the same structure and are arranged symmetrically with respect to the center of the radiating surface 10.

[0097] In some other embodiments, the connecting metal 40 may be located on the second surface 202, the two first strip structures 51 adjacent to the connecting metal 40 may be located on the first surface 201, the two next-to-next first strip structures 51 may be located on the second surface 202, and the second strip structure 52 may be located on the first surface 201.

[0098] Understandably, in Figure 5 In the example, a filter unit 30, such as the filter unit 30 in the upper left corner, forms a symmetrical filter circuit. In one branch, there are three first filter lines 511 and three second filter lines 522. Therefore, filter unit 30 is a 3-stage filter structure. In other embodiments, the number of first filter lines 511 and two filter lines 522 in one branch can be different, but this number represents the number of stages in the filter structure. The number of stages in the filter structure can be set according to actual needs, for example, it can be 4 stages, 5 stages, etc.

[0099] In this embodiment, reference continues to be made to... Figure 5 and Figure 7 In the adjacent connecting metal 40 and metal-air strip structure 50, one is located on the first surface 201 and the other is located on the second surface 202. The metal-air strip structure 50 is coupled to the connecting metal 40. This can improve the radiation efficiency of the radiation unit 100.

[0100] In some embodiments, combined with Figure 2 , Figure 5 andFigure 7 The first surface 201 and the second surface 202 of the support substrate 20 are both provided with positioning parts 22.

[0101] The metal air strip structure 50 and the connecting metal 40, which are coupled to each other, are connected to the support substrate 20 by means of hot melting or snap-fit ​​through the corresponding positioning part 22.

[0102] The positioning part 22 can be, for example, a columnar structure integrally formed on the support substrate 20. The end of the positioning part 22 has a partially flared neck. The metal air strip structure 50 and the connecting metal 40 have second through holes 221 corresponding to the position of the positioning part 22. After the positioning part 22 is inserted into the corresponding second through hole 221, the partially flared neck at the end of the positioning part 22 engages with the edge of the opening of the second through hole 221, thus positioning the metal air strip structure 50, the connecting metal 40, and the support substrate 20 relative to each other. The positioning part 22 is located at the coupling position of the first coupling element 513 and the connecting metal 40. This ensures that the coupling gap remains constant when the connecting metal 40 and the metal air strip structure 50 are coupled together.

[0103] In this embodiment of the application, combined with Figure 1 and Figure 2 The supporting 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 from each other and intersected to form a grid. The grid may form a cutout 21. In some embodiments, each connecting metal 40 and metal air strip structure 50 is provided with a corresponding rib 25.

[0104] The width of the rib 25 can be smaller than that of the corresponding metal-air strip structure 50, in order to minimize dielectric loss. At least some of the ribs 25 can extend in the same direction as the corresponding metal-air strip structure 50.

[0105] In this embodiment of the application, as mentioned above, when the radiation unit 100 is a dual-polarized radiation unit, the number of filter units 30 is four, the number of feed baluns 62 is two, and the filter units 30 are arranged in pairs in mutually orthogonal polarization directions.

[0106] The outer frame 24 is constructed as a first square frame structure 241, and some of the ribs 25 are connected to each other to form a second square frame structure 242, which is located inside the first square frame structure 241. In addition, some of the ribs 25 are also formed as a ring frame structure 243, which is located between the first square frame structure 241 and the second square frame structure 242. Some of the ribs 25 are also connected to the first square frame structure 241, the ring frame structure 243, and the second square frame structure 242 in sequence to strengthen the structure of the supporting substrate 20.

[0107] Furthermore, the support shell 61 and the support substrate 20 are constructed as a single unit. This allows for the support of the power supply balun 62 and the radiating surface 10 with a simple structure.

[0108] Figure 8 This diagram compares the efficiency of the radiating element provided in this embodiment with that of radiating elements in related technologies. The radiating elements in the related technologies are in the form of a PCB. Figure 8 In the diagram, the horizontal axis represents the operating frequency of the radiating element, and the vertical axis represents the radiation efficiency value. Figure 8 It can be seen that the efficiency of the radiating element 100 of this application is always greater than that of the radiating element in the related art within its operating frequency range (approximately 690MHz-960MHz).

[0109] This application embodiment also provides an antenna device, which includes a reflector and the above-mentioned radiating element 100, with the support shell 61 of the radiating element 100 connected to the reflector.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0111] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by 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 provided on the support substrate, each of the filter units including a connecting metal and a plurality of metal-air strip line structures that are electrically connected in sequence to form a loop-shaped filter circuit, and 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: A support shell connected to the second surface of the support substrate; and At least one feed balun connected to the support shell, the feed balun being configured as a microstrip transmission line, and the ground layer of the feed balun being electrically connected to two connecting metals located in the same polarization direction. Wherein, the support substrate is provided with a plurality of hollow parts arranged through the support substrate, and the support substrate is configured as an insulating member; 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; the connecting metal, the first strip line structure and the second strip line structure in the filter unit are alternately arranged on opposite sides of the support substrate in sequence according to the connection order; The 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 surface have an overlapping part to be coupled to each other; One of the connecting metal and the metal-air strip line structure adjacent to each other is located on the first surface, and the other is located on the second surface; the metal-air strip line structure is coupled to the connecting metal; 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 and intersecting each other; Each of the connecting metal and the metal-air strip line structure is provided with the rib; at least part of the extension direction of the rib is the same as the extension direction 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 first surface and the second surface of the support substrate are provided with a matching part; 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 being hot-melted or clamped with the corresponding matching part.

3. The radiation unit of claim 2, characterized in that The projection of the matching 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.

4. Radiating element according to claim 3, characterized in that 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.

5. The radiation unit of claim 3, wherein The first strip line structure includes a first filter strip line, a first strip line and a first coupling element connected in sequence; The first coupling element of one of the two first strip line structures adjacent to each other and located on the first surface and the second surface respectively at least partially overlaps the first strip line of the other first strip line structure on the reference surface to form the overlapping part.

6. Radiating element according to claim 5, characterized in that The second strip line structure comprises a second strip line, two second filter strip lines and two second coupling elements; The two second filter strip lines are connected to the second strip line, and the second filter strip lines are connected with the second coupling elements one by one in a one-to-one correspondence; In the first strip line structure and the second strip line structure adjacent to each other, one of which is located on the first surface, and the other is located on the second surface, the second coupling element of the second strip line structure and the projection of the first strip line of the first strip line structure on the reference surface at least partially overlap to form the overlapping part.

7. The radiation unit of claim 6, characterized in that In the filter unit, the number of the connecting metal and the second strip line structure is one, and the number of the first strip line structure is an even number; The connecting metal is located on the first surface of the support substrate.

8. The radiation unit of claim 1, wherein, The first surface and the second surface of the support substrate are provided with positioning parts; The metal-air strip line structure and the connecting metal coupled to each other are connected to the support substrate by means of hot melting or clamping through the corresponding positioning parts; The positioning parts are arranged at the coupling position of the metal-air strip line structure and the connecting metal.

9. The radiation unit according to any of claims 1-7, characterized by, The connecting metal is configured as a metal-air strip line; Or the radiation surface comprises a printed circuit board, and the connecting metal is arranged on the surface of the printed circuit board.

10. Radiating element according to claim 9, characterized in that The connecting end of the feed-through barrette facing the radiation surface penetrates the hollow part of the support substrate and is inserted into the corresponding connecting metal.

11. The radiation unit according to any of claims 1-7, characterized by The radiation unit is a dual-polarized radiation unit, the number of filter units is four, the number of feed-through barrettes is two, and the filter units are arranged in pairs on mutually orthogonal polarization directions.

12. The radiation unit according to any of claims 1-7, characterized by The support shell and the support substrate are configured as an integrated structure.

13. The radiation unit of claim 12, characterized in that The radiation unit further comprises a base, one side of the feed-through barrette away from the radiation surface is connected to the base, and the base is connected to the support shell.

14. An antenna device, characterized by It comprises a reflector plate and a radiation unit as claimed in any one of claims 1-13; The support shell of the radiation unit is connected to the reflector plate.

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