Radiating unit, manufacturing method thereof and antenna device

Abstract

The invention relates to a radiation unit, a manufacturing method thereof and an antenna device. The radiation unit comprises a radiation surface, a balun and a base; the radiating surface comprises at least one radiating arm in a polarization direction, the balun comprises at least one feed balun, the radiating arms and the feed balun are arranged in a one-to-one correspondence manner, the radiating arms are positioned at one end part of the corresponding feed balun, and the base is positioned at the other end part of the feed balun; the feed balun comprises a balun ground and a feed part, the feed part is arranged on the balun ground, the feed part and the balun ground form a transmission line, and the feed part is further coupled and connected with the corresponding radiation arm; wherein the radiating surface, the balun ground and the base form an integrated structure. According to the radiation unit, the manufacturing method thereof and the antenna device, the number of welding spots is small, assembling is easy, and cost is low.

Description

Technical Field

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

[0002] The radiation unit is the main part of the antenna, which can send and receive electromagnetic waves in a direction, thereby realizing wireless communication. At present, most radiation units are in the form of PCB units, and their radiation surface, balun, and base are all PCB circuits. The various components are welded together under the support of plastic parts to form a radiation unit. This type of radiation unit is widely used because of its advantages such as easy design of the filtering structure of the radiation surface and convenient and flexible unit layout. However, the radiation unit of the related art has the problems of more solder joints, complex assembly, and high cost. Summary of the invention

[0003] Based on this, it is necessary to provide a radiation unit and a manufacturing method thereof, and an antenna device with fewer solder joints, simple assembly, and low cost.

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

[0005] The radiation surface includes at least one radiation arm in a polarization direction, the balun includes at least one feeding balun, the radiation arm and the feeding balun are arranged in one-to-one correspondence, the radiation arm is located at one end of the corresponding feeding balun, and the base is located at the other end of the feeding balun;

[0006] The feeding balun includes a balun ground and a feeding element, wherein the feeding element is arranged on the balun ground and forms a transmission line with the balun ground, and the feeding element is also coupled and connected with the corresponding radiation arm;

[0007] The radiation surface, the balun ground and the base are constructed as an integrated structure.

[0008] In one embodiment, the radiation arm of a single polarization direction includes a first sub-radiation arm and a second sub-radiation arm arranged at intervals, the feed balun includes two balun grounds arranged at intervals from each other, and the two balun grounds are defined as a first balun ground and a second balun ground;

[0009] Two ends of the first balun ground are respectively connected to the first sub-radiation arm and the base in one piece, and two ends of the second balun ground are respectively connected to the second sub-radiation arm and the base in one piece.

[0010] In one embodiment, the radiating unit is a dual-polarized radiating unit, and the number of the radiating arms and the feeding balun are both two; the two feeding baluns are respectively defined as a first feeding balun and a second feeding balun; the two radiating arms are respectively defined as a first radiating arm and a second radiating arm;

[0011] The first sub-radiating arm and the second sub-radiating arm of the first radiating arm are respectively located in the first and third quadrants of the radiating surface, and the first sub-radiating arm and the second sub-radiating arm of the second radiating arm are respectively located in the second and fourth quadrants of the radiating surface, wherein the first, second, third and fourth quadrants are divided by orthogonal axes whose two intersection points coincide with the center of the radiating surface;

[0012] The first sub-radiating arm and the second sub-radiating arm of the first radiating arm are respectively connected to the first balun ground and the second balun ground of the first feeding balun; the first sub-radiating arm and the second sub-radiating arm of the second radiating arm are respectively connected to the first balun ground and the second balun ground of the second feeding balun.

[0013] In one embodiment, two orthogonal axes are defined as a first axis and a second axis;

[0014] In the same feeding balun, the first balun ground and the second balun ground are arranged in parallel and are arranged at intervals along the extension direction of the first axis and the extension direction of the second axis; or

[0015] The first balun ground and the second balun ground of the first feed balun are aligned along the extension direction of the second axis, and the first balun ground and the second balun ground of the second feed balun are aligned along the extension direction of the first axis.

[0016] In one embodiment, the number of the feeders is two, and the two feeders are defined as a first feeder and a second feeder;

[0017] The first balun ground and the second balun ground of the first feeding balun are arranged at intervals along the extension direction of the second axis, so that the first feeding element is inserted between the first balun ground and the second balun ground; and / or

[0018] The first balun ground and the second balun ground of the second feeding balun are arranged at intervals along the extending direction of the first axis, so that the second feeding element is inserted between the first balun ground and the second balun ground.

[0019] In one embodiment, the feeder is constructed as an air strip line; the number of the feeders is two, and the two feeders are defined as a first feeder and a second feeder, and the first feeder and the second feeder each include a first strip line segment, a second strip line segment, and a third strip line segment connected between the first strip line segment and the second strip line segment;

[0020] In the first feeding balun, the first stripline segment of the first feeding element is arranged at the first balun ground of the first feeding balun, and the second stripline segment of the first feeding element is arranged at the second balun ground of the first feeding balun; in the second feeding balun, the first stripline segment of the second feeding element is arranged at the first balun ground of the second feeding balun, and the second stripline segment of the second feeding element is arranged at the second balun ground of the second feeding balun.

[0021] In one embodiment, the base includes a main body and four connecting arms extending outward from the main body, and the four connecting arms are respectively connected to the first balun ground and the second balun ground of the first feeding balun and the first balun ground and the second balun ground of the second feeding balun.

[0022] In one embodiment, the radiation surface further includes a filter branch, and the first sub-radiation arm and the second sub-radiation arm are both integrally connected with the filter branch to form at least one filter circuit.

[0023] In one embodiment, the filter circuit includes an open resonant ring, and the operating frequencies of the first sub-radiating arm and the second sub-radiating arm are greater than or equal to the first frequency and less than or equal to the second frequency; the induced current on the open resonant ring caused by electromagnetic radiation greater than the second frequency can offset the induced current on the corresponding first sub-radiating arm or the second sub-radiating arm.

[0024] A second aspect of the present application provides an antenna device, comprising a reflector and the above-mentioned radiation unit; the reflector comprises a first surface and a second surface arranged opposite to each other in a thickness direction;

[0025] The base of the radiation unit is electrically connected to the first surface, and one end of the feeding element which is away from the radiation surface passes through the reflection plate and extends to one side of the second surface of the reflection plate.

[0026] In one of the embodiments, the antenna device further includes a transition piece between a cable and a metal;

[0027] The outer conductor of the cable is welded to the reflector through a transition piece, and the inner conductor of the cable is electrically connected to a feeder extending to one side of the second surface of the reflector.

[0028] A third aspect of the present application provides a method for manufacturing a radiation unit, which is used to manufacture the above-mentioned radiation unit. The method for manufacturing the radiation unit includes:

[0029] Cutting a planar metal plate to form a pre-processed part, the pre-processed part comprising a central part, at least two extension parts extending outward from the central part, and sub-radiating arms connected to the extension parts in a one-to-one correspondence, the sub-radiating arms being integrally connected with filter branches to form at least one filter circuit;

[0030] Bend each sub-radiating arm perpendicularly toward a first side in a thickness direction of the metal plate relative to the corresponding extending portion;

[0031] At the connection position between each extension part and the central part, the extension part is vertically bent toward a second side relative to the central part so that each sub-radiating arm is coplanar, wherein the second side is opposite to the first side.

[0032] In one of the embodiments, in the step of forming the pre-processed part, a cutting notch is further formed at the connection position between each extension portion and the central portion, the cutting notch comprising a first notch segment and a second notch segment which are continuous and perpendicular to each other, the first notch segment extending along the relative direction between the sub-radiating arm and the central portion, and the second notch segment extending to the outer contour line of the extension portion;

[0033] The step of vertically bending the extension portion relative to the central portion toward the second side specifically includes:

[0034] The extension portion is bent at an end position of the first notch segment facing away from the second notch segment.

[0035] Beneficial effects of the above-mentioned radiation unit, manufacturing method thereof, and antenna device:

[0036] By constructing the radiation surface, balun ground and base into an integrated structure, there is no need for welding or assembly between the radiation surface, balun ground and base, which reduces the number of solder joints of the entire radiation unit and reduces costs. In addition, the feed is coupled with the corresponding radiation arm, which can further reduce the number of solder joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of the connection between the radiating arm of a single polarization direction and the corresponding feeding balun in the radiating unit provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of the decomposed structure of the radiation unit provided in an embodiment of the present application;

[0040] Figure 4 A top view of the connection structure between the feed balun and the base in the radiation unit provided in an embodiment of the present application;

[0041] Figure 5 A top view of a radiation unit provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of the structure of an antenna device provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of the structure of the antenna device provided in an embodiment of the present application from another angle;

[0044] Figure 8 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of forming a pre-processed part in the method for manufacturing a radiation unit provided in an embodiment of the present application;

[0046] Fig.10 for Fig. 9 A top view of

[0047] Fig.11 A schematic diagram of bending a sub-radiating arm in a method for manufacturing a radiation unit provided in an embodiment of the present application;

[0048] Fig.12 A schematic diagram of bending the extension portion in the method for manufacturing the radiation unit provided in an embodiment of the present application;

[0049] Fig.13 This is a comparison chart of the efficiency of the radiation unit provided in the embodiment of the present application and the radiation unit of the related art.

[0050] Description of Figure Numbers:

[0051] 100. Radiating unit;

[0052] 10. Radiating surface; 11. Balun;

[0053] 20, radiation arm; 200, sub-radiation arm; 201, first sub-radiation arm; 202, second sub-radiation arm; 21, first radiation arm; 22, second radiation arm;

[0054] 30. filter branch; 300. open resonant ring; 31. first segment; 32. second segment; 33. third segment; 34. fourth segment;

[0055] 40. base; 41. connecting arm; 42. main body;

[0056] 50, feed balun; 500, balun ground; 501, first balun ground; 502, second balun ground; 51, first feed balun; 52, second feed balun;

[0057] 60, feeder; 601, first strip line segment; 602, second strip line segment; 603, third strip line segment; 61, first feeder; 62, second feeder;

[0058] 70. Transition piece;

[0059] 80, pre-processed part; 81, central part; 82, extension part; 83, cutting notch; 831, first notch section; 832, second notch section;

[0060] 1000, antenna device; 310, reflector; 311, first surface; 312, second surface; 320, cable;

[0061] F, first axis; S, second axis; T, third axis; R, fourth axis. DETAILED DESCRIPTION

[0062] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0063] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0068] The radiation unit and its manufacturing method, and the antenna device of the embodiments of the present application are described below with reference to the accompanying drawings.

[0069] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the connection between the radiating arm of a single polarization direction and the corresponding feeding balun in the radiating unit provided in an embodiment of the present application; Figure 3 A schematic diagram of the decomposed structure of the radiation unit provided in an embodiment of the present application; Figure 4 A top view of the connection structure between the feed balun and the base in the radiation unit provided in an embodiment of the present application; Figure 5 A top view of a radiation unit provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of an antenna device provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of the antenna device provided in an embodiment of the present application from another angle; Figure 8 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application; Fig. 9 A schematic diagram of forming a pre-processed part in the method for manufacturing a radiation unit provided in an embodiment of the present application; Fig.10 for Fig. 9 A top view of Fig.11 A schematic diagram of bending a sub-radiating arm in a method for manufacturing a radiation unit provided in an embodiment of the present application; Fig.12 A schematic diagram of bending the extension portion in the method for manufacturing the radiation unit provided in an embodiment of the present application.

[0070] Reference Figure 1The radiation unit 100 provided in the embodiment of the present application includes a radiation surface 10, a balun 11 and a base 40. The radiation surface 10 includes a radiation arm 20 in at least one polarization direction. The balun 11 includes at least one feeding balun 50, and the radiation arm 20 and the feeding balun 50 are arranged in a one-to-one correspondence. The radiation arm 20 is located at one end of the corresponding feeding balun 50, and the base 40 is located at the other end of the feeding balun 50 away from the radiation arm 20.

[0071] The feeding balun 50 includes a balun ground 500 and a feeding element 60. The feeding element 60 is disposed on the balun ground 500 and forms a transmission line with the balun ground 500. The feeding element 60 is also coupled to the corresponding radiation arm 20. The radiation surface 10, the balun ground 500 and the base 40 are constructed as an integrated structure.

[0072] Since the radiation surface 10, the balun ground 500 and the base 40 are constructed as an integrally formed part, there is no need for welding or assembly between the radiation surface 10, the balun ground 500 and the base 40, which reduces the number of solder joints of the entire radiation unit 100 and reduces the cost. In addition, the feed element 60 is coupled to the corresponding radiation arm 20, which can further reduce the number of solder joints.

[0073] Here, the radiation surface 10, the balun ground 500 and the base 40 are constructed as an integrally formed part, which means that the radiation surface 10, the balun ground 500 and the base 40 are an integral structural part, which are directly electrically connected without welding or electroplating. The radiation surface 10, the balun ground 500 and the base 40 can be made of metal, for example, they can be integrally formed from the same flat metal plate through cutting, bending and other processes. In this way, the parts can be electrically connected without electroplating.

[0074] The radiating arm 20 is located at one end of the corresponding feeding balun 50, and the base 40 is located at the other end of the feeding balun 50. In this way, when the radiating surface 10, the balun ground 500 and the base 40 are constructed as an integrated structure, the radiating surface 10, the balun ground 500 and the base 40 can be cut on a plane first, and then the radiating surface 10 and the base 40 can be bent relative to the balun ground 500.

[0075] In the embodiment of the present application, the feeder 60 is arranged on the balun ground 500 and forms a transmission line with the balun ground 500. The feeder 60 can be in the form of a PCB. For example, the feeder 60 is constructed as a printed circuit board, and is coupled with the corresponding balun ground 500 through the ground layer (copper sheet) on the back of the printed circuit board, so that the feeder 60 and the corresponding balun ground 500 form a transmission line.

[0076] In another possible implementation, the feeder 60 is constructed as an air strip line, and the air strip line and the corresponding balun ground 500 form a transmission line, which can ensure the integrity of the signal, realize flexible distribution of feeding, and facilitate layout. This is also applicable to the cable-free solution. In the embodiment of the present application, the feeder 60 is an air strip line as an example for explanation, and the example of the feeder 60 being a printed circuit board is similar to this, and will not be repeated here.

[0077] In the present application, refer to Figure 2 The radiation arm 20 of a single polarization direction includes a first sub-radiation arm 201 and a second sub-radiation arm 202 which are spaced apart from each other. The feeding balun 50 includes two balun grounds 500 which are spaced apart from each other. The two balun grounds 500 are defined as a first balun ground 501 and a second balun ground 502 .

[0078] Two ends of the first balun ground 501 are respectively connected to the first sub-radiation arm 201 and the base 40 in one piece, and two ends of the second balun ground 502 are respectively connected to the second sub-radiation arm 202 and the base 40 in one piece.

[0079] Since the first sub-radiating arm 201 and the second sub-radiating arm 202 are spaced apart, and the first balun ground 501 and the second balun ground 502 are spaced apart, in fact, the first sub-radiating arm 201 and the first balun ground 501 as a whole and the second sub-radiating arm 202 and the second balun ground 502 as a whole are spaced apart, so that it is convenient for the feeding element 60 to pass through the gap from one side of the radiation surface 10 and be installed between the first balun ground 501 and the second balun ground 502.

[0080] In the embodiment of the present application, the radiation unit 100 is a dual-polarized radiation unit for illustration, wherein the number of the radiation arms 20 and the feeding balun 50 are both two. For the case where the radiation unit 100 is a single-polarized radiation unit, the number of the radiation arms 20 and the feeding balun 50 are both one. In this case, the connection conditions of the various parts are similar to those of the dual-polarized radiation unit and are not illustrated here.

[0081] Further, refer to Figure 3 In the case where the radiation unit 100 is a dual-polarization radiation unit, the two feeding baluns 50 are respectively defined as the first feeding balun 51 and the second feeding balun 52, and the two radiation arms 20 are respectively defined as the first radiation arm 21 and the second radiation arm 22. The two feeding elements 60 are respectively defined as the first feeding element 61 and the second feeding element 62. For the convenience of observation, Figure 2 The second radiation arm 22 and the second feeding balun 52 are omitted, and only the connection between the first radiation arm 21 and the first feeding balun 51 is illustrated.

[0082] Combination Figure 2 and Figure 3, the first sub-radiation arm 201 and the second sub-radiation arm 202 of the first radiation arm 21 are respectively located in the first and third quadrants of the radiation plane 10, and the first sub-radiation arm 201 and the second sub-radiation arm 202 of the second radiation arm 22 are respectively located in the second and fourth quadrants of the radiation plane 10, wherein the first, second, third and fourth quadrants are divided by two orthogonal axes whose intersections coincide with the center of the radiation plane 10. The two orthogonal axes are the first axis F and the second axis S. In other words, the first sub-radiation arm 201 and the second sub-radiation arm 202 of the first radiation arm 21, and the first sub-radiation arm 201 and the second sub-radiation arm 202 of the second radiation arm 22 are orthogonally distributed in dual polarization to form two pairs of symmetrical radiation arm pairs.

[0083] It should be noted that the first sub-radiation arm 201 and the second sub-radiation arm 202 of the first radiation arm 21 are respectively located in the first and third quadrants of the radiation plane 10, and the first sub-radiation arm 201 and the second sub-radiation arm 202 of the second radiation arm 22 are respectively located in the second and fourth quadrants of the radiation plane 10, which means that the first sub-radiation arm 201 and the second sub-radiation arm 202 of the first radiation arm 21 and the first sub-radiation arm 201 and the second sub-radiation arm 202 of the second radiation arm 22 are respectively located in four quadrants and are spaced apart from each other.

[0084] When specifically connected, the first sub-radiating arm 201 and the second sub-radiating arm 202 of the first radiating arm 21 are respectively connected to the first balun ground 501 and the second balun ground 502 of the first feeding balun 51. The first sub-radiating arm 201 and the second sub-radiating arm 202 of the second radiating arm 22 are respectively connected to the first balun ground 501 and the second balun ground 502 of the second feeding balun 52.

[0085] That is, the first sub-radiating arm 201 of the first radiating arm 21 is connected to the first balun ground 501 of the first feeding balun 51, and the second sub-radiating arm 202 of the first radiating arm 21 is connected to the second balun ground 502 of the first feeding balun 51. The first sub-radiating arm 201 of the second radiating arm 22 is connected to the first balun ground 501 of the second feeding balun 52, and the second sub-radiating arm 202 of the second radiating arm 22 is connected to the second balun ground 502 of the second feeding balun 52.

[0086] In addition, in combination with 3 and 4, for the first sub-radiation arm 201 and the second sub-radiation arm 202 in the radiation arm 20, the first sub-radiation arm 201 and the second sub-radiation arm 202 are respectively connected to the opposite sides of the first balun ground 501 and the second balun ground 502, so that the first balun ground 501 can be bent relative to the base 40 from one side of the center of the radiation surface 10 with the first sub-radiation arm 201, and the second balun ground 502 can be bent relative to the base 40 from the other side of the center of the radiation surface 10 with the second sub-radiation arm 202, that is, the first sub-radiation arm 201 and the second sub-radiation arm 202 are bent into place from different sides of the center of the radiation surface 10.

[0087] In the present application, refer to Figure 4 In the same feeding balun 50 , the first balun ground 501 and the second balun ground 502 are arranged in parallel, and are arranged at intervals along the extension direction of the first axis F and the extension direction of the second axis S.

[0088] It can be understood that the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 are arranged at intervals along the extension direction of the second axis S, so that the first feeding element 61 is inserted between the first balun ground 501 and the second balun ground 502 .

[0089] The first balun ground 501 and the second balun ground 502 of the second feeding balun 52 are arranged at intervals along the extending direction of the first axis F, so that the second feeding element 62 is inserted between the first balun ground 501 and the second balun ground 502 .

[0090] Of course, the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 are also arranged at intervals along the extension direction of the first axis F, and the first balun ground 501 and the second balun ground 502 of the second feeding balun 52 are arranged at intervals along the extension direction of the second axis S. In this way, a space Z is defined between the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 and the first balun ground 501 and the second balun ground 502 of the second feeding balun 52, and the space Z is opened toward the radiation surface 10. Figure 3 and Figure 4 Since the first sub-radiating arm 201 and the second sub-radiating arm 202 of the first radiating arm 21 and the first sub-radiating arm 201 and the second sub-radiating arm 202 of the second radiating arm 22 are respectively located in four quadrants, and in the same feeding balun 50, the first balun ground 501 and the second balun ground 502 are spaced apart in the extension direction of the first axis F and the extension direction of the second axis S, the space Z is connected to the intervals between the sub-radiating arms, so that the first feeding element 61 and the second feeding element 62 that cross in the space can be installed from one side of the radiation surface 10 and inserted into the space Z.

[0091] Alternatively, in some other embodiments, the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 may be arranged in alignment along the extension direction of the second axis S, and the first balun ground 501 and the second balun ground 502 of the second feeding balun 52 may be arranged in alignment along the extension direction of the first axis F. The first feeding balun 51 and the second feeding balun 52 form a substantially cross shape as a whole.

[0092] In addition, the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 , and the first balun ground 501 and the second balun ground 502 of the second feeding balun 52 are arranged symmetrically with respect to the center of the radiation surface 10 .

[0093] In the present application, continue to refer to Figure 3 In the example where the feeder 60 is constructed as an air strip line, the first feeder 61 and the second feeder 62 each include a first strip line segment 601 , a second strip line segment 602 , and a third strip line segment 603 connected between the first strip line segment 601 and the second strip line segment 602 .

[0094] In the first feeding balun 51, the first stripline segment 601 of the first feeding element 61 is arranged at the first balun ground 501 of the first feeding balun 51, and the second stripline segment 602 of the first feeding element 61 is arranged at the second balun ground 502 of the first feeding balun 51. In the second feeding balun 52, the first stripline segment 601 of the second feeding element 62 is arranged at the first balun ground 501 of the second feeding balun 52, and the second stripline segment 602 of the second feeding element 62 is arranged at the second balun ground 502 of the second feeding balun 52.

[0095] In a specific implementation, there is a gap between the air strip line and the corresponding first balun ground 501 and second balun ground 502, and they are fixedly connected by a plastic part (not shown). It can be understood that because the first balun ground 501 and the second balun ground 502 are made of metal, they can be used to form a ground, and the air strip line is laid on the first balun ground 501 and the second balun ground 502 for feeding. Only a small amount of plastic parts with a high hollowing rate can be used to fix the air strip line on the balun ground 500, so that it can be stably fed.

[0096] Of course, if a cable-free solution is adopted in the radiation unit 100 of the embodiment of the present application, the feeding element 60 can be directly connected to the phase shifter after passing through the reflection plate 310 without the need for a coaxial line.

[0097] Furthermore, combined with Figure 3 and Figure 4The first stripline segment 601 and the second stripline segment 602 of the first feed element 61 are respectively arranged at the opposite sides of the first balun ground 501 and the second balun ground 502 of the first feed balun 51 along the extension direction of the second axis S. The first stripline segment 601 and the second stripline segment 602 of the second feed element 62 are respectively arranged at the opposite sides of the first balun ground 501 and the second balun ground 502 of the second feed balun 52 along the extension direction of the first axis F.

[0098] One of the third strip line segment 603 of the first power feeding element 61 and the third strip line segment 603 of the second power feeding element 62 is located above the other, and a certain distance is required between the two.

[0099] Furthermore, in the same feeding balun 50 , the first balun ground 501 and the second balun ground 502 are arranged in parallel. For example, the first balun ground 501 and the second balun ground 502 are both flat plate-shaped members and are arranged in parallel.

[0100] In the embodiment of the present application, the base 40 includes a main body 42 and four connecting arms 41 extending outward from the main body 42, and the four connecting arms 41 are respectively and integrally connected to the first balun ground 501 and the second balun ground 502 of the first feeding balun 51, and the first balun ground 501 and the second balun ground 502 of the second feeding balun 52.

[0101] Further, refer to Figure 5 The radiation surface 10 further includes a filter branch 30, and the first sub-radiation arm 201 and the second sub-radiation arm 202 are both integrally connected with the filter branch 30 to form at least one filter circuit. In this way, the filtering function can be realized by using the integrally formed first sub-radiation arm 201 and the filter branch 30, and the integrally formed second sub-radiation arm 202 and the filter. Compared with the case where the radiation surface adopts the PCB form in the related art, the loss caused by the PCB circuit is avoided, and the efficiency of the radiation unit 100 is improved.

[0102] The filter circuit includes an open resonant ring 300, and the operating frequencies of the first sub-radiating arm 201 and the second sub-radiating arm 202 are greater than or equal to the first frequency and less than or equal to the second frequency. The induced current on the open resonant ring 300 by electromagnetic radiation having a frequency greater than the second frequency can offset the induced current on the corresponding first sub-radiating arm 201 or second sub-radiating arm 202.

[0103] The radiation surface 10 radiates or receives radio waves through the radiation arm 20. The first sub-radiation arm 201 and the second sub-radiation arm 202 are integrally connected with the filter branch 30 to form at least one filter circuit including an open resonant ring 300. The operating frequencies of the first sub-radiation arm 201 and the second sub-radiation arm 202 are greater than or equal to the first frequency and less than or equal to the second frequency. The induced current on the open resonant ring 300 by the electromagnetic radiation greater than the second frequency can offset the induced current on the corresponding first sub-radiation arm 201 or the second sub-radiation arm 202. In this way, when the electromagnetic radiation greater than the second frequency passes through the radiation unit 100, the surface of the open resonant ring 300 The carried induced current can maintain a good relationship with the induced current on the corresponding first sub-radiation arm 201 or the second sub-radiation arm 202, that is, the induced current on the open resonant ring 300 of the electromagnetic radiation greater than the second frequency can offset the induced current on the corresponding first sub-radiation arm 201 or the second sub-radiation arm 202, and the induced current of the electromagnetic radiation greater than the second frequency on the radiation unit 100 can be reduced or even completely eliminated, thereby filtering the electromagnetic radiation greater than the second frequency, so as to achieve the effect that the first sub-radiation arm 201 and the second sub-radiation arm 202 are equivalently disconnected when the frequency is higher than the second frequency and are equivalently conducted when the frequency is lower than the second frequency.

[0104] In the present application, continue to refer to Figure 5 , the upper radiation sections of the first sub-radiation arm 201 and the second sub-radiation arm 202 are defined as the first segment 31, the filter branch 30 includes a second segment 32 arranged opposite to the first segment 31, a third segment 33 connected to the same end of the first segment 31 and the second segment 32, and a fourth segment 34 connected to the end of the first segment 31 away from the third segment 33. The first segment 31, the second segment 32, the third segment 33 and the fourth segment 34 jointly define the above-mentioned open resonant ring 300, and the end of the fourth segment 34 away from the first segment 31 is spaced apart from the end of the second segment 32 away from the third segment 33 to define the opening of the open resonant ring 300.

[0105] Since the opening is located between the end of the second segment 32 and the end of the fourth segment 34, that is, the opening is offset relative to the middle of the second segment 32 and the middle of the fourth segment 34, so that the opening is offset relative to the middle of the open resonant ring 300, so that the open resonant ring 300 forms a biased open ring filter structure loaded on the first sub-radiating arm 201 or the second sub-radiating arm 202, which is beneficial to expanding the bandwidth of the filtering frequency band.

[0106] Furthermore, the first sub-radiating arm 201 and the second sub-radiating arm 202 are both closed frames, and one or more open resonant rings 300 of different sizes are arranged on four sides of the first sub-radiating arm 201 and the second sub-radiating arm 202 around the center of the frame. Figure 5 In the example, when the second sub-radiating arm 202 located in the fourth quadrant is used as an example for explanation, on one frame side of the second sub-radiating arm 202, two groups of first segments 31, second segments 32, third segments 33 and fourth segments 34 are used to define two open resonant rings 300. The arrangement of the filter branches 30 on the four frame sides of the second sub-radiating arm 202 is the same, and will not be repeated here. Of course, in the dual-polarized radiation unit, each first sub-radiating arm 201 and the second sub-radiating arm 202 are arranged symmetrically relative to the center of the radiation surface 10.

[0107] In addition, in the embodiment of the present application, as mentioned above, the radiation unit 100 may also be a single-polarization radiation unit, wherein the number of the radiation arm 20 and the feed balun 50 are both one, for example, Figure 1 The single-polarized radiation unit 100 can be formed by removing the second radiation arm 22 and the second feed balun 52.

[0108] In the present application, refer to Figure 6 and Figure 7 , an antenna device 1000 is also provided, including a reflection plate 310 and the above-mentioned radiation unit 100, the reflection plate 310 includes a first surface 311 and a second surface 312 arranged opposite to each other along the thickness direction.

[0109] The base 40 of the radiation unit 100 is electrically connected to the first surface 311 , and one end of the feeding element 60 which is away from the radiation surface 10 penetrates the reflection plate 310 and extends to the second surface 312 of the reflection plate 310 .

[0110] Furthermore, the antenna device 1000 further includes a cable 320 and a metal transition piece 70 .

[0111] The outer conductor of the cable 320 is welded to the reflector 310 through the transition piece 70 , and the inner conductor of the cable 320 is electrically connected to the feeding element 60 extending to one side of the second surface 312 of the reflector 310 .

[0112] Furthermore, an insulating spacer (not shown) is provided between the reflective plate 310 and the base 40 , and the reflective plate 310 and the base 40 are connected via insulating screws, so that the reflective plate 310 and the base 40 are coupled and connected.

[0113] Reference Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 The embodiment of the present application further provides a method for manufacturing a radiation unit, which is used to manufacture the above-mentioned radiation unit 100. The method for manufacturing the radiation unit includes:

[0114] S10, cutting the flat metal sheet to form Fig. 9 The pre-processed part 80 shown includes a central portion 81, at least two extension portions 82 extending outward from the central portion 81, and sub-radiating arms 200 connected to the extension portions 82 one by one. The sub-radiating arms 200 are integrally connected with the filter branches 30 to form at least one filter circuit.

[0115] S20, such as Fig.11 As shown, each sub-radiating arm 200 is bent vertically toward a first side in the thickness direction of the metal plate relative to the corresponding extending portion 82 .

[0116] S30 . At the connection position between each extension portion 82 and the central portion 81 , bend the extension portion 82 vertically toward a second side relative to the central portion 81 , so that each sub-radiating arm 200 is coplanar, wherein the second side is opposite to the first side.

[0117] In the embodiment of the present application, the metal plate may be, for example, a flat metal plate, which is formed into a pre-processed piece by engraving, cutting and other processes, that is, a planar unfolded figure of each part of the radiation unit, and then bent into shape. Here, a dual-polarized radiation unit is used as an example for explanation, and the case where the radiation unit 100 is single-polarized is similar to this, and will not be repeated here.

[0118] Combination Figure 1 , Figure 9-12 In the radiation unit 100 made by the above method, because it is formed by bending the same flat metal plate, there is no need for many PCB solder joints. Also, because of the inherent hardness of the metal, it can support the feed balun 50 and the radiation surface 10, eliminating the problem of using plastic parts for support in traditional PCB units, saving the number of components, simplifying assembly and welding, and improving the efficiency of the radiation unit. At the same time, because the radiation surface 10 and the balun 500 do not need to be electroplated, the cost is also reduced.

[0119] In the example of the dual-polarized radiation unit, the number of the extensions 82 and the number of the sub-radiation arms 200 are both four, and the plane where the pre-processed part 80 is located is divided into four quadrants rotating counterclockwise, namely, quadrants 5, 6, 7, and 8, by two orthogonal axes, namely, the third axis T and the fourth axis R. The intersection of the third axis T and the fourth axis R coincides with the center of the central portion 81.

[0120] Combination Figure 3 and Fig. 9, the four extensions 82 are respectively located in the fifth, sixth, seventh and eighth quadrants, and the four sub-radiation arms 200 are also located in the fifth, sixth, seventh and eighth quadrants in one-to-one correspondence with the four extensions 82. Finally, the sub-radiation arm 200 located in the eighth quadrant forms the first sub-radiation arm 201 of the first radiation arm 21, the sub-radiation arm 200 located in the fifth quadrant forms the first sub-radiation arm 201 of the second radiation arm 22, the sub-radiation arm 200 located in the sixth quadrant forms the second sub-radiation arm 202 of the first radiation arm 21, and the sub-radiation arm 200 located in the seventh quadrant forms the second sub-radiation arm 202 of the second radiation arm 22.

[0121] The extension portion 82 located in the eighth quadrant forms the first balun ground 501 of the first feed balun 51 , the extension portion 82 located in the sixth quadrant forms the second balun ground 502 of the first feed balun 51 , the extension portion 82 located in the seventh quadrant forms the second balun ground 502 of the second feed balun 52 , and the extension portion 82 located in the fifth quadrant forms the first balun ground 501 of the second feed balun 52 .

[0122] Of course, after step S30, combined with Figure 3 The feeding element 60 can be inserted into the aforementioned space Z from the first sub-radiating arm 201 and the second sub-radiating arm 202 of the first radiating arm 21 and the first sub-radiating arm 201 and the second sub-radiating arm 202 of the second radiating arm 22, and the feeding element 60 is fixed to the corresponding balun 500. That is, the manufacturing of the radiating unit 100 is completed.

[0123] The filtering branches 30 on the four sub-radiating arms 200 and how to form the filter circuit have been described in detail above and will not be described again here.

[0124] In the embodiment of the present application, in step S10, continue to refer to Fig. 9 In the step of forming the pre-processed part 80, a cutting notch 83 is also formed at the connection position of each extension portion 82 and the central portion 81, and the cutting notch 83 includes a first notch segment 831 and a second notch segment 832 that are connected to each other and perpendicular to each other. The first notch segment 831 extends in the relative direction of the sub-radiating arm 200 and the central portion 81, and the second notch segment 832 extends to the outer contour line of the extension portion 82.

[0125] In step S30, the step of vertically bending the extension portion 82 relative to the central portion 81 toward the second side specifically includes:

[0126] The extension portion 82 is bent at the end of the first notch section 831 away from the second notch section 832. At this time, the portion of the central portion 81 close to the second notch section 832 forms the connecting arm 41.

[0127] The performance of the radiation unit in the embodiment of the present application is tested below.

[0128] Fig.13 This is a comparison chart of the efficiency of the radiation unit provided in the embodiment of the present application and the radiation unit of the related art. The radiation unit in the related art adopts the form of PCB. Fig.13 In the figure, the horizontal axis is the operating frequency of the radiation unit, and the vertical axis is the efficiency value. Fig.13 It can be seen that the efficiency of the radiation unit 100 of the present application is always greater than the efficiency of the radiation unit in the related art within its operating frequency band (roughly within the range of 690 GHz-960 GHz).

[0129] 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.

[0130] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radiation unit, characterized in that: Includes radiating surface, balun and base; The radiation surface includes at least one radiation arm in a polarization direction, the balun includes at least one feeding balun, the radiation arm and the feeding balun are arranged in one-to-one correspondence, the radiation arm is located at one end corresponding to the feeding balun, and the base is located at the other end of the feeding balun; The feeding balun comprises a balun ground and a feeding element, wherein the feeding element is arranged on the balun ground and forms a transmission line with the balun ground, and the feeding element is also coupled and connected with the corresponding radiation arm; Wherein, the radiation surface, the balun ground and the base are constructed as an integrated structure.

2. The radiation unit according to claim 1, characterized in that: The radiation arm of a single polarization direction includes a first sub-radiation arm and a second sub-radiation arm arranged at intervals, the feed balun includes two balun grounds arranged at intervals from each other, and the two balun grounds are defined as a first balun ground and a second balun ground; Two ends of the first balun ground are respectively connected to the first sub-radiation arm and the base in one piece, and two ends of the second balun ground are respectively connected to the second sub-radiation arm and the base in one piece.

3. The radiation unit according to claim 2, characterized in that: The radiation unit is a dual-polarization radiation unit, and the number of the radiation arms and the feeding balun are both two; the two feeding baluns are respectively defined as a first feeding balun and a second feeding balun; the two radiation arms are respectively defined as a first radiation arm and a second radiation arm; The first sub-radiating arm and the second sub-radiating arm of the first radiating arm are respectively located in the first and third quadrants of the radiating surface, and the first sub-radiating arm and the second sub-radiating arm of the second radiating arm are respectively located in the second and fourth quadrants of the radiating surface, wherein the first, second, third and fourth quadrants are divided by orthogonal axes whose two intersections coincide with the center of the radiating surface; The first sub-radiating arm and the second sub-radiating arm of the first radiating arm are respectively and integrally connected to the first balun ground and the second balun ground of the first feeding balun; the first sub-radiating arm and the second sub-radiating arm of the second radiating arm are respectively and integrally connected to the first balun ground and the second balun ground of the second feeding balun.

4. The radiation unit according to claim 3, characterized in that: defining the two orthogonal axes as a first axis and a second axis; In the same feed balun, the first balun ground and the second balun ground are arranged in parallel and are arranged at intervals along the extension direction of the first axis and the extension direction of the second axis; or The first balun ground and the second balun ground of the first feeding balun are aligned along the extension direction of the second axis, and the first balun ground and the second balun ground of the second feeding balun are aligned along the extension direction of the first axis.

5. The radiation unit according to claim 4, characterized in that: The number of the feeders is two, and the two feeders are defined as a first feeder and a second feeder; The first balun ground and the second balun ground of the first feeding balun are arranged at intervals along the extension direction of the second axis, so that the first feeding element is inserted between the first balun ground and the second balun ground; and / or The first balun ground and the second balun ground of the second feeding balun are arranged at intervals along the extension direction of the first axis, so that the second feeding element is inserted between the first balun ground and the second balun ground.

6. The radiation unit according to claim 4, characterized in that: The feeder is constructed as an air strip line; the number of the feeders is two, and the two feeders are defined as a first feeder and a second feeder, and the first feeder and the second feeder each include a first strip line segment, a second strip line segment, and a third strip line segment connected between the first strip line segment and the second strip line segment; In the first feeding balun, the first strip line segment of the first feeding element is arranged at the first balun ground of the first feeding balun, and the second strip line segment of the first feeding element is arranged at the second balun ground of the first feeding balun; in the second feeding balun, the first strip line segment of the second feeding element is arranged at the first balun ground of the second feeding balun, and the second strip line segment of the second feeding element is arranged at the second balun ground of the second feeding balun.

7. The radiation unit according to claim 3, characterized in that: The base includes a main body and four connecting arms extending outward from the main body, and the four connecting arms are respectively connected to the first balun ground and the second balun ground of the first feeding balun, and the first balun ground and the second balun ground of the second feeding balun.

8. The radiation unit according to any one of claims 2 to 7, characterized in that: The radiation surface further includes a filter branch, and the first sub-radiation arm and the second sub-radiation arm are both integrally connected with the filter branch to form at least one filter circuit.

9. The radiation unit according to claim 8, characterized in that: The filter circuit includes an open resonant ring, and the operating frequencies of the first sub-radiating arm and the second sub-radiating arm are greater than or equal to a first frequency and less than or equal to a second frequency; the induced current on the open resonant ring by electromagnetic radiation greater than the second frequency can offset the induced current on the corresponding first sub-radiating arm or the second sub-radiating arm.

10. An antenna device, characterized in that: A reflector comprising a reflector and a radiation unit as claimed in any one of claims 1 to 9; the reflector comprising a first surface and a second surface arranged opposite to each other in a thickness direction; The base of the radiation unit is electrically connected to the first surface, and one end of the feeding element that is away from the radiation surface passes through the reflection plate and extends to one side of the second surface of the reflection plate.

11. The antenna device according to claim 10, characterized in that: The antenna device also includes a cable and a metal transition piece; The outer conductor of the cable is welded to the reflector through the transition piece, and the inner conductor of the cable is electrically connected to the feeder extending to one side of the second surface of the reflector.

12. A method for manufacturing a radiation unit, characterized in that: Used to manufacture a radiation unit according to any one of claims 1 to 9, wherein the manufacturing method of the radiation unit comprises: Cutting a planar metal plate to form a pre-processed part, wherein the pre-processed part includes a central part, at least two extension parts extending outward from the central part, and sub-radiating arms connected to the extension parts in a one-to-one correspondence, wherein the sub-radiating arms are integrally connected with filter branches to form at least one filter circuit; Bend each of the sub-radiating arms perpendicularly toward a first side in a thickness direction of the metal plate relative to the corresponding extending portion; At the connection position between each of the extending portions and the central portion, the extending portion is vertically bent toward a second side relative to the central portion so that each of the sub-radiating arms is coplanar, wherein the second side is opposite to the first side.

13. The method for manufacturing the radiation unit according to claim 12, characterized in that: In the step of forming the pre-processed part, a cutting notch is further formed at the connection position between each of the extension parts and the central part, wherein the cutting notch includes a first notch segment and a second notch segment which are continuous and perpendicular to each other, wherein the first notch segment extends along the relative direction between the sub-radiating arm and the central part, and the second notch segment extends to the outer contour line of the extension part; The step of vertically bending the extension portion relative to the central portion toward the second side specifically includes: The extension portion is bent at an end position of the first notch segment facing away from the second notch segment.

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