Radiating unit and antenna

Abstract

The invention relates to a radiation unit and an antenna. The radiation unit comprises a radiator, four feed parts and two combining parts, the radiator comprises four dipoles arranged in a polarization orthogonal mode to form dual polarization, a base and four groups of balun arms connected to the base, and each dipole is supported on the base through a group of balun arms; one feed piece correspondingly feeds one dipole, the feed pieces are coaxial cables, and one end of the inner conductor of each feed piece is electrically connected with the corresponding dipole; the combining piece is arranged on the base and comprises a feed section and a combining section, the feed section is of a strip-shaped structure, and the other ends of the inner conductors of the two feed pieces for feeding the two dipoles with the same polarization are electrically connected with the two ends of one feed section; one end of the combination section is connected with the feed section, and the other end is connected with an external feed cable; and the orthographic projections of the two combining pieces on the base are not overlapped. According to the radiation unit, the feed sections are not crossed, so that the cross polarization ratio index of the radiation unit can be improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a radiation unit and an antenna. Background Art

[0002] With the development of the communications industry, miniaturized, multi-band, and multi-standard base station antennas have become mainstream antennas. In order to improve space utilization, the antenna's radiating unit usually adopts a nested structure, that is, the high-frequency radiating structure is nested in the low-frequency radiating structure, but this will make the feed connection in the radiating unit complicated and difficult to assemble.

[0003] In the related art, the radiating unit is fed by an integrally formed sheet metal strip structure feeder, which integrates the combiner terminal into the radiating unit and simplifies the assembly process. However, the radiating unit with integrated combiner terminal has a serious problem of deterioration of the cross-polarization ratio index, and the performance of the radiating unit cannot match the performance requirements of base station antenna products. Summary of the invention

[0004] The purpose of the present application is to provide a radiation unit and an antenna, aiming to improve the problem of serious deterioration of the cross-polarization ratio index of the radiation unit.

[0005] In a first aspect, the present application provides a radiation unit, comprising:

[0006] A radiator, comprising four dipoles arranged in a polarization orthogonal manner to form dual polarization, a base and four groups of balun arms connected to the base, each of the dipoles is supported on the base through a group of the balun arms, and the base is provided with two through holes;

[0007] Four feeders, one of which is corresponding to one of the dipoles, and the feeders are coaxial cables, and one end of the inner conductor of each of the feeders is electrically connected to the corresponding dipole;

[0008] Two combiners are arranged on the base, the combiners include a feeding section and a combining section, the feeding section is a strip structure, and the other ends of the inner conductors of the two feeding elements feeding the two dipoles of the same polarization are electrically connected to the two ends of one feeding section; each combining section is passed through one of the through holes, one end of the combining section is connected to the feeding section, and the other end is used to connect an external feeding cable;

[0009] Wherein, the orthographic projections of the two combining elements on the base do not overlap.

[0010] In some embodiments, both ends of the feeding section are provided with connection surfaces for connecting to the inner conductor of the feeding element, and the connection surfaces at both ends of the feeding section are coplanar and parallel to the front surface of the base.

[0011] In some embodiments, a portion of the feed element is disposed on the balun arm and another portion is disposed on the base, the inner conductor of the feed element is electrically connected to the feeding segment of the combiner at an electrical connection position, and an orthographic projection of the electrical connection position on a plane coplanar with the front surface of the base is located on the front surface of the base.

[0012] In some embodiments, a first limiting member is provided on the base at a position near the end of each of the feeding sections, and the first limiting member is provided with a first limiting portion that can cooperate and be fixed with the outer conductor of the feeding member, and the end of the feeding member can be fixed to the first limiting member through the first limiting portion to limit the end of the inner conductor of the feeding member to a position near the end of the feeding section; wherein the first limiting portion has a limiting surface parallel to the front surface of the base, and the limiting surfaces of each of the first limiting members are coplanar.

[0013] In some embodiments, the orthographic projections of two of the feeders for dipole feeding with different polarizations on the base intersect, and the orthographic projections of the other two feeders on the base do not intersect; a second limiting member is also provided on the base, and the second limiting member is provided at the intersection position of the two intersecting feeders, and the second limiting member is used to limit the intersection part of the two intersecting feeders on the base.

[0014] In some embodiments, a plurality of guide members are further provided on the base, and the guide members are provided between the balun arm corresponding to the uncrossed feeder and the first limit member, and the guide members are used to guide the arrangement path of the uncrossed feeder on the base.

[0015] In some embodiments, the radiation unit also includes a mounting member, which is made of insulating material and includes two integrally formed mounting seats, each of which is used to mount one of the combiners; the mounting member can be mounted on the base to mount the two combiners on the base.

[0016] In some embodiments, a positioning portion is further provided on the base, and a matching portion is provided on the mounting member corresponding to the positioning portion, and the matching portion can be matched and connected with the positioning portion to locate the installation position of the mounting member on the base.

[0017] In some embodiments, the mounting seat is provided with a supporting surface, and the supporting surface is used to support the feeding section; wherein the supporting surfaces of the two mounting seats are coplanar and parallel to the front surface of the base 12 .

[0018] In some embodiments, a plurality of second limiting portions are protruding from the support surface, and the plurality of second limiting portions are arranged along the outer contour of the positive projection of the feeding segment on the support surface, and the second limiting portions are used to stop one side of the feeding segment adjacent to the support surface.

[0019] In some embodiments, a third limiting portion is protruding from at least one of the second limiting portions, the third limiting portion is arranged opposite to the supporting surface, and the third limiting portion is used to stop the side of the feeding section away from the supporting surface.

[0020] In some embodiments, a mounting hole is provided on the support surface, and the mounting hole is used to pass the combining section; wherein the mounting holes of the two mounting seats are arranged in a one-to-one correspondence with the two through holes on the base, so that the combining section of each combining component can be passed through the corresponding through hole.

[0021] In some embodiments, a limiting boss is provided on the side of the mounting seat facing away from the supporting surface, the shape of the limiting boss matches the shape of the through hole, and the limiting boss can be plugged into and matched with the through hole; a limiting hole is provided on the limiting boss, the shape of the limiting hole matches the shape of the junction section, and the limiting hole is connected with the mounting hole, and the junction section can be inserted into the limiting hole.

[0022] In some embodiments, a plurality of snap-fitting portions are provided at the bottom of the mounting seat, and the snap-fitting portions are used to snap-fit ​​with the base.

[0023] In some embodiments, the connection position between the combining section and the feeding section is equal to the transmission path between the two ends of the feeding section; and / or the feeding section and the combining section are integrally formed, and the combining component is one of a sheet metal part, a die casting or a printed circuit board.

[0024] In some embodiments, a receiving groove is provided on the balun arm along the length direction, and a portion of the feeder is provided in the receiving groove; at least one protrusion is protruding from the receiving groove, and the protrusion can cooperate and engage with the outer conductor of the feeder to connect the outer conductor of the feeder with the balun arm; wherein, at least one of the protrusions is provided at one end of the receiving groove close to the corresponding dipole to limit the end of the inner conductor of the feeder to a position close to the dipole.

[0025] In some embodiments, a connection slot is provided at one end of the balun arm connected to the dipole, and the dipole is connected to the inner conductor of the feeding element through the connection slot.

[0026] In a second aspect, the present application provides an antenna, comprising a radiation unit as described in any one of the above items.

[0027] The above-mentioned radiation unit and antenna, by setting up a combiner, realize terminal removal and integration, which can reduce welding requirements, reduce the loss of the radiation unit, improve intermodulation stability and reliability, and reduce costs. By setting the orthographic projections of the two combiners on the base not to overlap, so that there is no cross-stack between the strip feeding sections of the combiner, the cross-polarization ratio index of the radiation unit can be improved, the performance of the radiation unit can be improved, and it is beneficial for the radiation unit performance to match the performance requirements of base station antenna products. In addition, the feeder and the combiner are set separately, the structure is simple, and the installation is more convenient, which can reduce the maintenance cost of the radiation unit. In addition, the production process is simple, and it is not easy to deform during installation, which can improve the overall stability of the antenna, simplify the assembly process, improve production efficiency, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a radiation unit provided in some embodiments of the present application.

[0030] Figure 2 An exploded diagram of a radiation unit provided in some embodiments of the present application.

[0031] Figure 3 A schematic diagram of the structure of a radiator provided in some embodiments of the present application.

[0032] Figure 4 A schematic structural diagram of a radiator from another perspective provided in some embodiments of the present application.

[0033] Figure 5 A schematic diagram of the structure of a combiner provided in some embodiments of the present application.

[0034] Figure 6 A schematic structural diagram of another combiner provided in some embodiments of the present application.

[0035] Figure 7 A schematic diagram of the structure of the mounting parts provided in some embodiments of the present application.

[0036] Figure 8 A schematic structural diagram of a mounting member from another perspective provided in some embodiments of the present application.

[0037] Fig. 9A cross-polarization ratio curve diagram of the radiation units provided in some embodiments of the present application and the cross-co-ground radiation units in the related art.

[0038] Figure Number:

[0039] 100, radiation unit; 1, radiator; 11, dipole; 111, radiation arm; 12, base; 121, through hole; 122, first stopper; 1221, first stopper; 123, second stopper; 124, guide; 125, winding groove; 126, positioning part; 13, balun arm; 131, support arm; 132, receiving groove; 133, protrusion; 134, connection groove; 2, feeding element; 21, Inner conductor; 22, outer conductor; 23, insulating dielectric layer; 3, combiner; 31, feeding section; 311, connecting surface; 32, combiner section; 4, cable fixing member; 5, mounting member; 51, mounting seat; 511, matching portion; 512, supporting surface; 513, second limiting portion; 514, third limiting portion; 515, mounting hole; 516, limiting boss; 517, limiting hole; 518, clamping portion; 52, connecting arm. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application 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 application. However, the present application 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 application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, 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 application 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 a limitation on the present application.

[0042] 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 this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, 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 integrated 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 this application can be understood according to specific circumstances.

[0044] In the present application, 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”, and “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”, and “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.

[0045] 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. 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 in this application are for illustrative purposes only and are not intended to be the only implementation method.

[0046] In the related art, two integrally formed strip sheet metal feeds are used to feed the polarized input signals of the low-frequency radiator. The two feeds corresponding to the two polarizations overlap each other in an upper and lower manner, and one of the feeds is provided with a avoidance portion in the overlapping portion, and the avoidance portion is bent in a direction away from the bottom of the low-frequency radiator to form an arched avoidance structure, thereby avoiding cross contact with the other feed, ensuring that the two feeds are fed independently of each other. However, the use of a common ground structure in the cross portion causes a serious deterioration in the cross-polarization ratio index, and the performance of the radiating unit cannot match the performance requirements of base station antenna products.

[0047] See also Figure 1 and Figure 2 , Figure 1 shows a schematic structural diagram of a radiation unit in some embodiments of the present application, Figure 2An exploded view of a radiation unit in some embodiments of the present application is shown. The radiation unit 100 provided in the embodiment of the present application includes a radiator 1, four feeders 2 and two combiners 3. The radiator 1 includes four dipoles 11 arranged in a polarization orthogonal manner to form dual polarization, a base 12 and four groups of balun arms 13 connected to the base 12. Each dipole 11 is supported on the base 12 by a group of balun arms 13. The base 12 is provided with two through holes 121. One feeder 2 is fed to one dipole 11, and the feeder 2 is a coaxial cable. One end of the inner conductor 21 of each feeder 2 is electrically connected to the corresponding dipole 11. The combiner 3 is provided on the base 12. The combiner 3 includes a feed section 31 and a combiner section 32. The feed section 31 is a strip structure. The other ends of the inner conductors 21 of the two feeders 2 that feed the two dipoles 11 of the same polarization are electrically connected to the two ends of a feed section 31. Each combining section 32 is passed through a through hole 121, one end of the combining section 32 is connected to the feeding section 31, and the other end is used to connect to an external feeding cable. The orthographic projections of the two combining elements 3 on the base 12 do not overlap.

[0048] The four dipoles 11 are arranged in an orthogonal polarization manner to form dual polarization, that is, the four dipoles 11 are divided into two pairs, and the two dipoles 11 in each pair work in the same polarization direction. The two pairs of dipoles 11 work in two mutually orthogonal polarization directions, and the two polarization directions can be, for example, a +45° polarization direction and a -45° polarization direction, or vertical polarization intersections, etc. The dipole 11 has a spatial entity structure, and each dipole 11 includes two radiating arms 111, and the four dipoles 11 can together form a radiating surface. For example, the radiating arm 111 can be a straight line, so that the four dipoles 11 together form a regular quadrilateral radiating surface. In other embodiments, the radiating arm 111 can also be an arc shape, so that the four dipoles 11 together form a circular radiating surface.

[0049] Each pair of dipoles 11 is supported by a pair of balun arms 13, each pair of balun arms 13 includes two groups of balun arms 13, and each group of balun arms 13 includes two symmetrically arranged support arms 131, which are used to support two radiating arms 111 of a dipole 11. The base 12 connects the two pairs of balun arms 13 to form an integral radiator 1, and the four groups of balun arms 13 are arranged equidistantly around the circumference of the base 12. For example, the base 12 can be annular. In some embodiments, the radiator 1 includes an annular base 12, two pairs of balun arms 13 extending upward and outward from the front of the base 12, and four dipoles 11 connected one by one to one end of the balun arm 13 away from the base 12, thereby forming a radiator 1 with a bowl-shaped structure. In some embodiments, the dipole 11, the base 12 and the balun arm 13 can be integrally formed.

[0050] Two feeders 2 are provided corresponding to the two dipoles 11 in each polarization direction, and each feeder 2 can be laid along the balun arm 13 and connected to the dipole 11. The feeder 2 can be a coaxial cable. The coaxial cable includes an inner conductor 21 and an outer conductor 22, and also includes an insulating dielectric layer 23. The inner conductor 21, the insulating dielectric layer 23 and the outer conductor 22 are nested in sequence from the inside to the outside, and the outer conductor 22 is insulated and isolated from the inner conductor 21 by the insulating dielectric layer 23. The coaxial cable can also include a protective layer sleeved on the outside of the outer conductor 22. Among them, exposed sections of the inner conductor 21 are provided at both ends of the feeder 2, which facilitates the connection between the inner conductor 21 of the feeder 2 and the dipole 11. For example, the exposed section of the inner conductor 21 of the feeder 2 is welded to the dipole 11 or connected by a fastener. Both ends of the feeder 2 may also be provided with exposed sections of the insulating dielectric layer 23, which are used to keep the outer conductor 22 and the inner conductor 21 away from each other in the length direction of the feeder 2, thereby reducing interference and lowering the risk of short circuit.

[0051] A combiner 3 is arranged corresponding to two dipoles 11 of one polarization. The feeding section 31 is a strip structure, such as a straight strip, an arc strip, a zigzag strip or a curved strip. The combining section 32 can be bent relative to the feeding section 31 so that the combining section 32 can pass through the through hole 121 on the base 12 and be connected to the external feeding cable on the back of the base 12 to introduce external signals. After the installation is completed, the feeding section 31 is located on the front of the base 12. The front of the base 12 refers to the side surface of the base 12 facing the dipole 11. The back of the base 12 refers to the side surface of the base 12 facing away from the dipole 11. In some embodiments, the combining section 32 is arranged perpendicular to the feeding section 31 so that the combining section 32 can just pass through the through hole 121 on the base 12, which is convenient for the installation of the combiner 3.

[0052] Corresponding to the two dipoles 11 of the same polarization, the other ends of the inner conductors 21 of the two feeders 2 are respectively connected to the two ends of the feeding section 31 of a combiner 3. For example, the exposed section of the inner conductor 21 of the feeder 2 is welded to the feeding section 31 of the combiner 3 or connected by fasteners. After the combiner 3 is assembled, the combining section 32 is passed through the through hole 121 of the base 12, and the combining section 32 is connected to the external feeding cable to introduce an external signal to form a feeding structure. The combiner 3 combines the two feeders 2 corresponding to the same polarization into one input signal to feed the dipole 11. Among them, the length of each feeder 2 has a matching relationship with the position where the combiner 3 is set, and the matching relationship between the two meets the impedance matching condition required to transmit its corresponding polarization signal through the radiation unit 100.

[0053] The combiner 3 is arranged on the base 12 of the radiator 1, so as to achieve the effect of integrating the combiner terminal into the radiation unit 100, eliminate the terminal, reduce the welding requirements, reduce the intermodulation risk of the external combiner, reduce the loss of the radiation unit 100, improve the intermodulation stability and reliability, and reduce the cost.

[0054] Since the orthographic projections of the two combiners 3 on the base 12 do not overlap, the cross-portion is replaced by the feeding element 2, i.e., a coaxial cable, so that the two combiners 3 can be fed independently of each other, and no cross-stacking occurs between the strip feeding sections 31 of the combiner 3, thereby improving the problem of serious deterioration of the cross-polarization ratio index caused by the common ground structure of the cross-portion, which is beneficial to improving the cross-polarization ratio index of the radiation unit 100.

[0055] Since the feeder 2 and the combiner 3 are separately arranged, installation is more convenient and the maintenance cost of the radiation unit 100 is reduced. In addition, the feeder 2 and the combiner 3 that are separately arranged have a simple production process and are not easily deformed during installation, thereby improving the overall stability of the antenna, simplifying the assembly process, improving production efficiency, and reducing production costs.

[0056] The radiation unit 100 of the embodiment of the present application realizes terminal removal and integration by setting the combiner 3, which can reduce welding requirements, reduce the loss of the radiation unit 100, improve intermodulation stability and reliability, and reduce costs. By setting the orthographic projections of the two combiners 3 on the base 12 not to overlap, so that there is no cross-stack between the strip feeding sections 31 of the combiner 3, the cross-polarization ratio index of the radiation unit 100 can be improved, the performance of the radiation unit 100 can be improved, and the performance of the radiation unit 100 can be matched with the performance requirements of the base station antenna product. In addition, the feeder 2 and the combiner 3 are set separately, the structure is simple, and the installation is more convenient, which can reduce the maintenance cost of the radiation unit 100, and the production process is simple, and it is not easy to deform during installation, which can improve the overall stability of the antenna, simplify the assembly process, improve production efficiency, and reduce production costs.

[0057] In some embodiments, see Figures 1 to 6 , Figure 3 shows a schematic structural diagram of a radiator 1 in some embodiments of the present application, Figure 4 shows a schematic structural diagram of the radiator 1 from another perspective in some embodiments of the present application, Figure 5 shows a schematic diagram of the structure of the combiner 3 in some embodiments of the present application, Figure 6 A schematic structural diagram of another combiner 3 in some embodiments of the present application is shown, where both ends of the feeding section 31 are provided with connection surfaces 311 for connecting to the inner conductor 21 of the feeding element 2, and the connection surfaces 311 at both ends of the feeding section 31 are coplanar and parallel to the front surface of the base 12.

[0058] The two ends of the feeding section 31 are provided with connecting surfaces 311, and the connecting surfaces 311 are used to connect the inner conductor 21 of the feeding element 2. For example, the exposed section of the inner conductor 21 of the feeding element 2 is welded to the connecting surface 311 at the end of the feeding section 31. The connecting surfaces 311 at the two ends of the feeding section 31 are coplanar, that is, the two ends of the feeding section 31 are located in the same plane. In some embodiments, the feeding section 31 is located in the same plane as a whole. After the combiner 3 is assembled, the connecting surfaces 311 at both ends of the feeding section 31 are parallel to the front side of the base 12. In this way, the connecting surfaces 311 at both ends of the feeding section 31 can be as parallel as possible to the exposed section of the inner conductor 21 of the feeding element 2, and there is no need to assemble and connect them by bending.

[0059] By providing the connection surface 311, the connection area between the feed section 31 and the inner conductor 21 of the feed element 2 can be increased, which is convenient for assembly and welding. By providing the connection surfaces 311 at both ends of the feed section 31 to be coplanar and parallel to the front surface of the base 12, the structure is simpler, which is conducive to improving the processing accuracy, and the connection positions of the two ends of the feed section 31 and the inner conductors 21 of the two feed elements 2 are in the same plane, which is convenient for assembly and welding, can improve the consistency during connection, can improve the welding stability, and enhance the intermodulation reliability.

[0060] In some embodiments, see Figure 1 and Figure 2 A portion of the feeding element 2 is disposed on the balun arm 13 and the other portion is disposed on the base 12. The inner conductor 21 of the feeding element 2 is electrically connected to the feeding section 31 of the combiner 3 at an electrical connection position. The orthographic projection of the electrical connection position on a plane coplanar with the front surface of the base 12 is located on the front surface of the base 12.

[0061] That is to say, the electrical connection positions of the two ends of the feeding section 31 and the inner conductors 21 of the two feeding elements 2 are located within the space facing the front surface of the base 12. In this way, the length of the feeding section 31 of the combiner 3 can be shortened, which is conducive to achieving non-overlapping of the orthographic projections of the two combiners 3 on the base 12, and is convenient for assembly and welding, improving connection consistency, and thus improving the reliability of the radiation unit 100.

[0062] In some embodiments, see Figures 1 to 3 A first stopper 122 is provided on the base 12 at a position close to the end of each feeding section 31. The first stopper 122 is provided with a first stopper 1221 that can be fixed with the outer conductor 22 of the feeder 2. The end of the feeder 2 can be fixed to the first stopper 122 through the first stopper 1221, so as to limit the end of the inner conductor 21 of the feeder 2 to a position close to the end of the feeding section 31. The first stopper 1221 has a stopper surface parallel to the front surface of the base 12, and the stopper surfaces of the first stoppers 122 are coplanar.

[0063] The first limiting member 122 is disposed on the base 12. In some embodiments, the first limiting member 122 can be integrally formed with the base 12. The first limiting portion 1221 can be fixed in cooperation with the outer conductor 22 of the feeder 2, which means that the outer conductor 22 of the feeder 2 can be fixed to the first limiting portion 1221. For example, in some embodiments, the first limiting portion 1221 can be a limiting groove, and the width of the limiting groove can be less than or equal to the outer diameter of the feeder 2, so that the feeder 2 can be clamped in the limiting groove. At this time, the limiting surface can be the groove bottom cutting plane of the limiting groove. In other embodiments, the first limiting portion 1221 can also be a limiting buckle, which is clamped and connected to the feeder 2 through the limiting buckle. When the end of the feeder 2 is fixed to the first limiting member 122 through the first limiting portion 1221, the feeder 2 is supported on the limiting surface.

[0064] By setting the first limiting portion 1221, it is convenient for the first limiting member 122 to limit and fix the feeder 2. By setting the first limiting member 122 to be located near the end of the feed section 31, the end of the inner conductor 21 of the feeder 2 can be limited to a position near the end of the feed section 31, which is convenient for assembling and connecting the end of the feed section 31 with the end of the inner conductor 21 of the feeder 2. By setting the limiting surface parallel to the front of the base 12, and the limiting surfaces of each first limiting member 122 are coplanar, the ends of the inner conductor 21 of each feeder 2 can be fixed on the same plane parallel to the front of the base 12, which is conducive to making the connection positions of the two ends of the feed section 31 and the ends of the inner conductor 21 of the two feeders 2 in the same plane, which is convenient for assembly and welding, can improve the consistency during connection, can improve welding stability, and enhance intermodulation reliability.

[0065] In some embodiments, see Figures 1 to 3 , wherein the orthographic projections of two feeders 2 fed by the dipoles 11 with different polarizations on the base 12 intersect, and the orthographic projections of the other two feeders 2 on the base 12 do not intersect. The base 12 is further provided with a second stopper 123, which is provided at the intersection position of the two intersecting feeders 2, and is used to limit the intersection of the two intersecting feeders 2 on the base 12.

[0066] For example, the second stopper 123 may be a cable slot structure, which can press the two coaxial cables onto the base 12. In other embodiments, the second stopper 123 may also be a cable pressure plate or a cable clamp. In some embodiments, the second stopper 123 may be integrally formed with the base 12.

[0067] By setting the second limiting member 123, the two intersecting feeding members 2 are limited and fixed on the base 12, which can improve the assembly effect of the feeding member 2, that is, the coaxial cable, reduce shaking, improve the connection stability, and facilitate installation, simple and beautiful.

[0068] In some embodiments, see Figures 1 to 3 A plurality of guide members 124 are also provided on the base 12 . A guide member 124 is provided between the balun arm 13 corresponding to the uncrossed feeder 2 and the first limit member 122 . The guide member 124 is used to guide the arrangement path of the uncrossed feeder 2 on the base 12 .

[0069] The uncrossed feeder 2 is laid on the base 12 between its corresponding balun arm 13 and the first stopper 122. The guide member 124 can be a guide rib, which extends along an arc between the corresponding balun arm 13 and the first stopper 122. When the coaxial cable of the feeder 2 is assembled and arranged, it can be arranged along the guide member 124 to facilitate the bending of the coaxial cable. In some embodiments, the guide member 124 can be integrally formed with the base 12. In some embodiments, see Figure 3 Two guide members 124 may be provided between the balun arms 13 and the first limit member 122 corresponding to the uncrossed feeder 2. The two guide members 124 are spaced apart to form a winding groove 125 between the two guide members 124, and the feeder 2 may be clamped in the winding groove 125.

[0070] By providing the guide member 124, the layout of the feeding member 2 on the base 12 can be guided, which is convenient for bending the coaxial cable and can improve the assembly effect of the coaxial cable.

[0071] In some embodiments, see Figure 5 and Figure 6 , the connection position between the coupling section 32 and the feeding section 31 is equal to the transmission path between the two ends of the feeding section 31.

[0072] The connection position between the combining section 32 and the feeding section 31 is equal to the transmission path between the two ends of the feeding section 31, that is, the connection position between the combining section 32 and the feeding section 31 is equal to the length between the two ends of the feeding section 31, so that when signal transmission is performed, the external signal is transmitted to the two ends of the feeding section 31 through the same distance, making the signal transmission more synchronous and reducing the loss of the radiation unit 100.

[0073] In some embodiments, the feed section 31 and the combiner section 32 are integrally formed. The combiner 3 is a sheet metal part, a die casting part or a printed circuit board.

[0074] The combiner 3 can be integrally formed by sheet metal or die-casting process, and the combiner 3 formed by sheet metal or die-casting process is a strip structure. The combiner 3 includes a feeding section 31 in the same plane, and the combining section 32 is integrally bent relative to the feeding section 31, and the combining section 32 can be perpendicular to the feeding section 31. The material of the combiner 3 can be, but is not limited to, copper or aluminum. The combiner 3 can also be a microstrip structure formed by a printed circuit board.

[0075] The combiner 3 is provided as an integrally formed structure, thereby reducing the welding between the feeding section 31 and the combiner section 32 , and the combiner section 32 can be formed by integrally bending, which is convenient for manufacturing and installation and can reduce costs.

[0076] In some embodiments, see Figure 5 and Figure 6 The two combiners 3 are plane symmetrical structures, and the symmetry plane is a plane parallel to the feeding section 31 and the combining section 32. In this way, the two combiners 3 can be symmetrically arranged on the base 12, which is convenient for assembly, and the symmetrical structure is simple and beautiful.

[0077] In some embodiments, see Figures 1 to 3 The balun arm 13 is provided with a receiving groove 132 along the length direction, and a part of the feeder 2 is provided in the receiving groove 132. At least one protrusion 133 is provided in the receiving groove 132, and the protrusion 133 can be engaged with the outer conductor 22 of the feeder 2 to connect the outer conductor 22 of the feeder 2 with the balun arm 13. Among them, at least one protrusion 133 is provided at one end of the receiving groove 132 close to the corresponding dipole 11, so as to limit one end of the inner conductor 21 of the feeder 2 to a position close to the dipole 11.

[0078] The side wall of one side of the accommodating groove 132 may be provided with a protruding portion 133, and the protruding portion 133 cooperates with the inner side wall of the opposite side of the accommodating groove 132 to form a slot structure capable of clamping the outer conductor 22 of the feeder 2. The side walls of the opposite sides of the accommodating groove 132 may also be provided with protruding portions 133, and the two protruding portions 133 are arranged opposite to each other to form a slot structure capable of clamping the outer conductor 22 of the feeder 2.

[0079] By providing the receiving groove 132, the feeder 2 can be laid along the receiving groove 132 on the balun arm 13, which is convenient for the assembly arrangement of the feeder 2, i.e., the coaxial cable, and can improve the assembly effect of the coaxial cable. By providing the protrusion 133, a slot structure that is convenient for connection with the outer conductor 22 of the coaxial cable can be formed, which is convenient for connecting the outer conductor 22 of the feeder 2 with the balun arm 13. By providing the protrusion 133 at one end of the receiving groove 132 close to the corresponding dipole 11, the end of the inner conductor 21 of the feeder 2 can be limited to a position close to the dipole 11, which is convenient for assembling and connecting the end of the inner conductor 21 of the feeder 2 with the dipole 11.

[0080] In some embodiments, see Figure 1 and Figure 2 The radiation unit 100 further includes a cable fixing member 4. The cable fixing member 4 is fixedly connected to the balun arm 13, and compresses the feeding member 2 to be located in the accommodating groove 132. For example, the cable fixing member 4 can be a cable fixing card.

[0081] In some embodiments, see Figures 1 to 3 A connection slot 134 is provided at one end of the balun arm 13 connected to the dipole 11 , and the dipole 11 is connected to the inner conductor 21 of the feeding element 2 through the connection slot 134 .

[0082] For example, the exposed section of the inner conductor 21 of the feeder 2 is welded in the connection groove 134 . The connection groove 134 is conducive to solder accumulation, convenient for assembly and welding, can provide a good welding effect, and improve connection stability and reliability.

[0083] By providing the connection groove 134 , it is convenient to fix the end of the inner conductor 21 of the feeding element 2 in the connection groove 134 , which is convenient for assembly and welding, thereby improving the assembly effect of the coaxial cable and improving the connection stability.

[0084] In some embodiments, see Figures 1 to 4 , Figure 7 and Figure 8 , Figure 7 shows a schematic diagram of the structure of the mounting member in some embodiments of the present application, Figure 8 The schematic diagram of the structure of the mounting member in some embodiments of the present application from another perspective is shown. The radiation unit 100 also includes a mounting member 5, which is made of insulating material. The mounting member 5 includes two integrally formed mounting seats 51, each of which is used to mount a combiner 3. The mounting member 5 can be mounted on the base 12 to mount the two combiners 3 on the base 12.

[0085] The mounting member 5 is integrally injection molded with an insulating material. The insulating material may be, but is not limited to, POM (Polyoxymethylene (Polyformaldehyde)), PP (Polypropylene), PA (Polyamides), etc. The two combiners 3 are installed at the base 12 of the radiator 1 at one time through the integrally molded mounting member 5, and the combiner 3 and the base 12 of the radiator 1 are insulated and isolated by the mounting seat 51. In some embodiments, the mounting member 5 also includes a connecting arm 52, which is integrally connected between the two mounting seats 51.

[0086] By adopting an integrated mounting component 5, the installation, fixation and insulation of the two combiners 3 and the radiator 1 can be achieved at the same time, which can improve the consistency of assembly, improve the installation accuracy, improve the intermodulation stability, and reduce the number of parts of the radiation unit 100, making the structure simpler, easier to assemble, and reducing costs.

[0087] In some embodiments, see Figure 3 and Figure 8A positioning portion 126 is also provided on the base 12 , and a matching portion 511 is provided on the mounting member 5 corresponding to the positioning portion 126 . The matching portion 511 can be matched and connected with the positioning portion 126 to locate the installation position of the mounting member 5 on the base 12 .

[0088] For example, one of the positioning portion 126 and the matching portion 511 is a positioning hole, and the other is a positioning column. The positioning hole and the positioning column are matched and plugged to locate the connection position of the mounting member 5 and the base 12. In some embodiments, the mounting seat 51 may be provided with a positioning hole, and the base 12 may be provided with a positioning column.

[0089] By setting the positioning portion 126 and the matching portion 511, the installation position of the mounting component 5 on the base 12 is positioned, so that the combining section 32 can pass through the through hole 121 on the base 12, which is convenient for the installation of the combining component 3, can improve the assembly accuracy of the combining component 3, and is conducive to improving the intermodulation stability.

[0090] In some embodiments, see Figure 1 and Figure 7 The mounting seat 51 is provided with a supporting surface 512, and the supporting surface 512 is used to support the feeding section 31. The supporting surfaces 512 of the two mounting seats 51 are coplanar and parallel to the front surface of the base 12.

[0091] When the mounting seat 51 is mounted on the base 12, the support surface 512 of the mounting seat 51 can be parallel to the front of the base 12. By setting the support surfaces 512 of the two mounting seats 51 to be coplanar and parallel to the front of the base 12, the two ends of the feeding sections 31 of the two combiners 3 can be located in the same plane parallel to the base 12, which is conducive to making the connection positions of the ends of the inner conductors 21 of each feeding element 2 and the ends of the feeding sections 31 on the same plane, facilitating assembly and welding, improving the consistency of connection, improving welding stability, and enhancing intermodulation stability and reliability.

[0092] In some embodiments, see Figure 1 and Figure 7 A plurality of second limiting portions 513 are protrudingly provided on the support surface 512 , and the plurality of second limiting portions 513 are arranged along the outer contour of the positive projection of the feeding section 31 on the support surface 512 , and the second limiting portions 513 are used to stop the side of the feeding section 31 adjacent to the support surface 512 .

[0093] For example, the second limiting portion 513 may be a boss stopper, which is arranged along the outer shape of the feeding section 31. In some embodiments, two groups of boss stops are arranged at intervals along the width direction of the feeding section 31 to form an accommodating groove for accommodating the feeding section 31, so as to stop and limit the opposite sides of the feeding section 31 in the width direction; a plurality of boss stops in one group are arranged at intervals along the length direction of the feeding section 31 to stop and limit the feeding section 31 at multiple positions in its length direction.

[0094] By providing a plurality of second limiting portions 513 , it is convenient to install, fasten and limit the feeding section 31 of the combiner 3 , thereby improving the installation accuracy and connection stability, and further improving the intermodulation stability.

[0095] In some embodiments, see Figure 1 and Figure 7 A third limiting portion 514 is protruding from at least one of the second limiting portions 513 . The third limiting portion 514 is arranged opposite to the supporting surface 512 . The third limiting portion 514 is used to stop the side of the feeding section 31 that is away from the supporting surface 512 .

[0096] For example, the third limiting portion 514 may be an elastic buckle.

[0097] By providing the third limiting portion 514 for fixing and clamping the feeding section 31 of the circuit-closer 3, the connection reliability can be improved.

[0098] In some embodiments, see Figures 1 to 4 and Figure 7 The support surface 512 is provided with a mounting hole 515, and the mounting hole 515 is used to pass through the junction section 32. The mounting holes 515 of the two mounting seats 51 are arranged in a one-to-one correspondence with the two through holes 121, so that the junction section 32 of each junction element 3 can be passed through the corresponding through hole 121.

[0099] In some embodiments, the center distance between the mounting holes 515 of the two mounting seats 51 is the same as the center distance between the two through holes 121 .

[0100] With such arrangement, when the mounting member 5 is mounted on the base 12 , the combining section 32 can pass through the through hole 121 on the base 12 , which facilitates the installation of the combining member 3 and helps to improve the intermodulation stability.

[0101] In some embodiments, see Figures 1 to 4 , Figure 7 and Figure 8 A limiting boss 516 is provided on the side of the mounting seat 51 away from the supporting surface 512. The shape of the limiting boss 516 matches the shape of the through hole 121, and the limiting boss 516 can be plugged into the through hole 121. A limiting hole 517 is provided on the limiting boss 516. The shape of the limiting hole 517 matches the shape of the junction section 32, and the limiting hole 517 is connected to the mounting hole 515, and the junction section 32 can be inserted into the limiting hole 517.

[0102] The limiting boss 516 is plugged into the through hole 121 to limit the connection between the mounting member 5 and the base 12. In some embodiments, the limiting boss 516 is tightly fitted with the through hole 121. The through hole 121 can be a cylindrical hole, and the limiting boss 516 can be a truncated cone. The combining section 32 of the combining member 3 is inserted into the limiting hole 517 to limit the combining section 32 of the combining member 3. When the mounting member 5 is installed on the base 12, the combining section 32 can pass through the through hole 121 on the base 12.

[0103] By providing the limiting boss 516 and the limiting hole 517, the installation of the combiner 3 is facilitated, the assembly accuracy of the combiner 3 can be improved, and the position stability of the combiner section 32 in the through hole 121 of the base 12 can be improved, which is beneficial to improving the stability of electrical indicators.

[0104] In some embodiments, see Figure 1 , Figure 7 and Figure 8 A plurality of snap-fitting portions 518 are provided at the bottom of the mounting seat 51 , and the snap-fitting portions 518 are used to be snap-fitted with the base 12 .

[0105] The bottom of the mounting seat 51 refers to the side of the mounting seat 51 that is away from the supporting surface 512. For example, the clamping portion 518 may be an elastic hook.

[0106] By providing the clamping portion 518, the clamping portion 518 can be matched and clamped with the base 12 to fix the mounting seat 51 and the base 12, which is convenient for assembly and disassembly and improves the connection reliability.

[0107] See also Fig. 9 , Fig. 9 A cross-polarization ratio curve diagram of the radiation unit in some embodiments of the present application and the sheet metal strip line cross common ground radiation unit in the related art is shown. Fig. 9 In the figure, the horizontal axis is the angle phi (deg), and the vertical axis is the cross-polarization ratio value XPD (dB); the three solid curves are the cross-polarization ratio curves of the three frequency points of the sheet metal strip cross common ground radiation unit in the related art, and the three dotted curves are the cross-polarization ratio curves of the three frequency points of the radiation unit 100 in the embodiment of the present application, and the three frequency points are 825MHz, 880MHz and 960MHz respectively. It can be seen that the cross-polarization ratio of the radiation unit 100 provided in the embodiment of the present application can be improved by 3-4 decibels (dB) within the range of ±60°, and can be improved by more than 10dB in the axial direction (ie 0°).

[0108] Based on the same inventive concept, an embodiment of the present application further provides an antenna, which includes a radiation unit 100 provided by any of the above embodiments.

[0109] In some embodiments, the antenna further includes a reflector, a feeding network including a phase shifter disposed on the back of the reflector, and the radiation unit 100 is disposed on the front of the reflector. The feeding network may include a phase shifting network composed of a plurality of phase shifters, which is used to output a phase-shifted signal that realizes a phase differential relationship of the signal after phase shifting, and feed the radiation unit 100.

[0110] Since the antenna has the same technical effect as the above-mentioned radiation unit 100, it will not be described again here.

[0111] 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.

[0112] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A radiation unit, characterized in that: include: A radiator, comprising four dipoles arranged in a polarization orthogonal manner to form dual polarization, a base and four groups of balun arms connected to the base, each of the dipoles is supported on the base through a group of the balun arms, and the base is provided with two through holes; Four feeders, one of which is corresponding to one of the dipoles, and the feeders are coaxial cables, and one end of the inner conductor of each of the feeders is electrically connected to the corresponding dipole; Two combiners are arranged on the base, the combiners include a feeding section and a combining section, the feeding section is a strip structure, and the other ends of the inner conductors of the two feeding elements feeding the two dipoles of the same polarization are electrically connected to the two ends of one feeding section; each combining section is passed through one of the through holes, one end of the combining section is connected to the feeding section, and the other end is used to connect an external feeding cable; Wherein, the orthographic projections of the two combining elements on the base do not overlap.

2. The radiation unit according to claim 1, characterized in that: Both ends of the feeding section are provided with connection surfaces for connecting the inner conductor of the feeding element, and the connection surfaces at the two ends of the feeding section are coplanar and parallel to the front surface of the base.

3. The radiation unit according to claim 1, characterized in that: A portion of the feed element is disposed on the balun arm and another portion is disposed on the base. The inner conductor of the feed element is electrically connected to the feed segment of the combiner at an electrical connection position, and an orthographic projection of the electrical connection position on a plane coplanar with the front surface of the base is located on the front surface of the base.

4. The radiation unit according to claim 3, characterized in that: A first limiting member is provided on the base at a position close to the end of each feeding section, and the first limiting member is provided with a first limiting portion that can be matched and fixed with the outer conductor of the feeding member, and the end of the feeding member can be fixed to the first limiting member through the first limiting portion to limit the end of the inner conductor of the feeding member to a position close to the end of the feeding section; wherein the first limiting portion has a limiting surface parallel to the front surface of the base, and the limiting surfaces of each of the first limiting members are coplanar.

5. The radiation unit according to claim 4, characterized in that: The orthographic projections of two of the feeding elements for the dipole feeding of different polarizations on the base intersect, and the orthographic projections of the other two of the feeding elements on the base do not intersect; The base is also provided with a second limiting member, which is arranged at the intersection position of the two intersecting feeding members, and is used to limit the intersection part of the two intersecting feeding members on the base.

6. The radiation unit according to claim 5, characterized in that: The base is also provided with a plurality of guide members, which are arranged between the balun arms corresponding to the uncrossed feeders and the first limit member, and are used to guide the arrangement path of the uncrossed feeders on the base.

7. The radiation unit according to any one of claims 1 to 6, characterized in that: The radiation unit also includes a mounting member, which is made of insulating material and includes two integrally formed mounting seats, each of which is used to mount one of the combiners; the mounting member can be mounted on the base to mount the two combiners on the base.

8. The radiation unit according to claim 7, characterized in that: The base is also provided with a positioning portion, and the mounting piece is provided with a matching portion corresponding to the positioning portion, and the matching portion can be matched and connected with the positioning portion to locate the mounting position of the mounting piece on the base.

9. The radiation unit according to claim 7, characterized in that: The mounting seat is provided with a supporting surface, and the supporting surface is used to support the feeding section; wherein the supporting surfaces of the two mounting seats are coplanar and parallel to the front surface of the base 12 .

10. The radiation unit according to claim 9, characterized in that: A plurality of second limiting portions are protrudingly provided on the support surface, and the plurality of second limiting portions are arranged along the outer contour of the positive projection of the feeding section on the support surface, and the second limiting portions are used to stop a side of the feeding section adjacent to the support surface.

11. The radiation unit according to claim 10, characterized in that: A third limiting portion is protrudingly provided on at least one of the second limiting portions, and the third limiting portion is arranged opposite to the supporting surface, and the third limiting portion is used to stop the side of the feeding section away from the supporting surface.

12. The radiation unit according to claim 9, characterized in that: The supporting surface is provided with a mounting hole, and the mounting hole is used to pass the combining section; wherein the mounting holes of the two mounting seats are arranged in a one-to-one correspondence with the two through holes on the base, so that the combining section of each combining member can be passed through the corresponding through hole.

13. The radiation unit according to claim 12, characterized in that: A limiting boss is provided on one side of the mounting seat away from the supporting surface, the shape of the limiting boss matches the shape of the through hole, and the limiting boss can be plugged and matched with the through hole; The limiting boss is provided with a limiting hole, the shape of which matches the shape of the junction section, and the limiting hole is communicated with the mounting hole, and the junction section can be inserted into the limiting hole.

14. The radiation unit according to claim 7, characterized in that: A plurality of clamping parts are arranged at the bottom of the mounting seat, and the clamping parts are used to be clamped with the base.

15. The radiation unit according to any one of claims 1 to 6, characterized in that: The connection position between the combining section and the feeding section and the transmission path between the two ends of the feeding section are equal; And / or, the feeding section and the combining section are integrally formed, and the combining component is one of a sheet metal component, a die-casting component or a printed circuit board.

16. The radiation unit according to any one of claims 1 to 6, characterized in that: The balun arm is provided with a receiving groove along the length direction, and a part of the feeder is provided in the receiving groove; at least one protruding portion is provided in the receiving groove, and the protruding portion can be matched and engaged with the outer conductor of the feeder to connect the outer conductor of the feeder with the balun arm; Wherein, at least one of the protrusions is arranged at one end of the accommodating groove close to the corresponding dipole, so as to limit the end of the inner conductor of the feeding element to a position close to the dipole.

17. The radiation unit according to any one of claims 1 to 6, characterized in that: One end of the balun arm connected to the dipole is provided with a connection slot, and the dipole is connected to the inner conductor of the feeding element through the connection slot.

18. An antenna, characterized in that: The antenna comprises the radiation unit according to any one of claims 1 to 17.

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