Radiating unit, manufacturing method thereof and antenna device

Abstract

The invention relates to a radiation unit, a manufacturing method thereof and an antenna device. The radiation unit comprises a radiation surface and a balun; the radiating surface comprises at least one radiating arm in a polarization direction, the balun comprises at least one feed balun, and the radiating arms and the feed balun are arranged in a one-to-one correspondence manner; the feed balun comprises a balun ground and a feed part, and the balun ground and the radiating surface are integrally formed; the feed part is configured to be a printed circuit board, the feed part is arranged on the balun ground, and a grounding layer of the feed part is in coupling connection with the balun ground; the feed parts are also coupled with the corresponding radiation arms; wherein the radiation surface further comprises a filtering branch knot, the radiation arm comprises two sub-radiation arms, and each sub-radiation arm is integrally connected with the filtering branch knot to form at least one filter circuit. According to the radiation unit, the manufacturing method thereof and the antenna device, the loss is small, and the efficiency is high.

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 supported by plastic parts and welded together 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 large loss and low efficiency. Summary of the invention

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

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

[0005] The radiation surface includes at least one radiation arm in a polarization direction, the balun includes at least one feeding balun, and the radiation arms and the feeding balun are arranged in a one-to-one correspondence;

[0006] The feeding balun includes a balun ground and a feeding component, and the balun ground and the radiation surface are integrally formed;

[0007] The feeder is configured as a printed circuit board, the feeder is arranged on a balun ground, the grounding layer of the feeder is coupled and connected to the balun ground; the feeder is also coupled and connected to a corresponding radiation arm;

[0008] Wherein, the radiation surface further includes a filter branch, the radiation arm includes two sub-radiation arms, and each sub-radiation arm is integrally connected with a filter branch to form at least one filter circuit.

[0009] In one embodiment, the filter circuit includes an open resonant ring, and the operating frequency of the sub-radiating arm is 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 caused by electromagnetic radiation greater than the second frequency can offset the induced current on the sub-radiating arm.

[0010] In one of the embodiments, the upper radiation section of the sub-radiation arm is defined as a first segment, and the filtering branch includes a second segment arranged opposite to the first segment, a third segment connected to the same end of the first segment and the second segment, and a fourth segment connected to an end of the first segment away from the third segment. The first segment, the second segment, the third segment and the fourth segment together define an open resonant ring; an end of the fourth segment away from the first segment is spaced apart from an end of the second segment away from the third segment to define the opening of the open resonant ring.

[0011] In one embodiment, two sub-radiating arms included in the same radiating arm are defined as a first sub-radiating arm and a second sub-radiating arm respectively, the first sub-radiating arm and the second sub-radiating arm are arranged at an interval, the feeding balun includes two balun grounds arranged at an interval, and the two balun grounds are defined as a first balun ground and a second balun ground;

[0012] In the feeding balun and the radiating arm corresponding to each other, the first balun is integrally connected to the first sub-radiating arm, and the second balun is integrally connected to the second sub-radiating arm.

[0013] In one embodiment, the feeder includes a first feeder, a second feeder, and a third feeder connected between the first feeder and the second feeder;

[0014] In the same feeding balun, the first feeding part is arranged on the first balun ground and coupled to the first balun ground, the second feeding part is arranged on the second balun ground and coupled to the second feeding part, and at least part of the structure of the third feeding part is located between the first balun ground and the second balun ground.

[0015] 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;

[0016] 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;

[0017] 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.

[0018] In one embodiment, the number of the feed elements is two, and the two feed elements are defined as a first feed element and a second feed element respectively; and the two orthogonal axes are defined as a first axis and a second axis;

[0019] In the first feeding balun, the first feeding part and the second feeding part of the first feeding element are respectively arranged on the opposite sides of the first balun ground and the second balun ground of the first feeding balun along the extension direction of the second axis; in the second feeding balun, the first feeding part and the second feeding part of the second feeding element are respectively arranged on the opposite sides of the first balun ground and the second balun ground of the second feeding balun along the extension direction of the first axis;

[0020] One of the third feeding portion of the first feeding element and the third feeding portion of the second feeding element is overlapped on the other one.

[0021] In one embodiment, in the same feeding balun, the first balun ground and the second balun ground are arranged in parallel;

[0022] 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;

[0023] 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.

[0024] In one embodiment, the radiation unit also includes a base, which includes a main body and four connecting arms extending outward from the main body, and the four connecting arms are respectively integrally connected to the first balun ground and the second balun ground of the first feed balun, and the first balun ground and the second balun ground of the second feed balun.

[0025] 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;

[0026] The balun ground of the radiation unit is electrically connected to the first surface, and one end of the feeding element away from the radiation surface passes through the reflection plate and extends to one side of the second surface of the reflection plate.

[0027] In one embodiment, it further comprises a cable, wherein the inner conductor of the cable is electrically connected to the strip line of the feeder extending to one side of the second surface of the reflector; and the outer conductor of the cable is welded and connected to the ground layer of the feeder.

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

[0033] Since the radiation surface includes a radiation arm and a filter branch, the radiation arm includes two sub-radiation arms, and each sub-radiation arm is integrally connected with a filter branch to form at least one filter circuit, that is, the filtering function is realized by using the integrally formed sub-radiation arm and the filter branch. Compared with the radiation surface in the related art in the form of PCB, the loss caused by the PCB circuit is avoided, and the efficiency of the radiation unit is improved. In addition, the radiation surface and the balun are directly integrally formed without welding, which reduces the number of solder joints of the entire radiation unit and also reduces the cost. Furthermore, the feeder is configured as a printed circuit board, which is less difficult to design and has a higher structural accuracy than simply setting the feeder as a strip line. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the expanded structure of the radiation unit provided in an embodiment of the present application;

[0036] Figure 3 An exploded view of the connection structure between the balun ground and the feeding element in the radiation unit provided in an embodiment of the present application;

[0037] Figure 4 A top view of the connection structure between the balun ground and the feeding element in the radiation unit provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of the structure of an antenna device provided in an embodiment of the present application;

[0039] Figure 6 A schematic cross-sectional view of the antenna device provided in an embodiment of the present application;

[0040] Figure 7 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application;

[0041] Figure 8 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;

[0042] Fig. 9 for Figure 8 A top view of

[0043] Fig.10 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;

[0044] Fig.11 A schematic diagram of bending the extension portion in the method for manufacturing the radiation unit provided in an embodiment of the present application;

[0045] Fig.12 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;

[0046] Fig.13 A standing wave cut diagram of a radiation unit provided in an embodiment of the present application;

[0047] Fig.14 The oscillator radiation pattern of the radiation unit provided in the embodiment of the present application.

[0048] Description of Figure Numbers:

[0049] 100. Radiating unit;

[0050] 10. Radiating surface; 11. Balun; 111. Balun ground;

[0051] 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;

[0052] 30. filter branch; 300. open resonant ring; 31. first segment; 32. second segment; 33. third segment; 34. fourth segment;

[0053] 40. base; 41. connecting arm; 42. main body;

[0054] 50, feed balun; 500, balun ground; 501, first balun ground; 502, second balun ground; 51, first feed balun; 52, second feed balun;

[0055] 60, feeder; 601, first feeder; 602, second feeder; 603, third feeder; 6001, strip line; 6002, substrate; 61, first feeder; 62, second feeder;

[0056] 80, pre-processed part; 81, central part; 82, extension part; 83, cutting notch; 831, first notch section; 832, second notch section;

[0057] 1000, antenna device; 310, reflector; 311, first surface; 312, second surface; 320, cable;

[0058] F, first axis; S, second axis; T, third axis; R, fourth axis. DETAILED DESCRIPTION

[0059] 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.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

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

[0066] 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 expanded structure of the radiation unit provided in an embodiment of the present application; Figure 3 An exploded view of the connection structure between the balun ground and the feeding element in the radiation unit provided in an embodiment of the present application; Figure 4 A top view of the connection structure between the balun ground and the feeding element in the radiation unit provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of an antenna device provided in an embodiment of the present application; Figure 6 A schematic cross-sectional view of the antenna device provided in an embodiment of the present application; Figure 7 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application; Figure 8 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. 9 for Figure 8 A top view of Fig.10 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.11 A schematic diagram of bending the extension portion in the method for manufacturing the radiation unit provided in an embodiment of the present application.

[0067] Reference Figure 1 The radiation unit 100 provided in the embodiment of the present application includes a radiation surface 10 and a balun 11.

[0068] The radiation surface 10 includes at least one radiation arm 20 in a polarization direction, and the balun 11 includes at least one feed balun 50, and the radiation arm 20 and the feed balun 50 are arranged one by one. The feed balun 50 includes a balun ground 500 and a feed element 60, and the balun ground 500 and the radiation surface 10 are integrally formed. The feed element 60 is configured as a printed circuit board, and the feed element 60 is arranged on the balun ground 500, and the ground layer of the feed element 60 is coupled to the balun ground 500, and the feed element 60 is also coupled to the corresponding radiation arm 20.

[0069] The radiation surface 10 further includes a filter branch 30 , and the radiation arm 20 includes two sub-radiation arms 200 . Each sub-radiation arm 200 is integrally connected with the filter branch 30 to form at least one filter circuit.

[0070] Since the radiation surface 10 includes a radiation arm 20 and a filter branch 30, the radiation arm 20 includes two sub-radiation arms 200, and each sub-radiation arm 200 is integrally connected with a filter branch 30 to form at least one filter circuit, that is, the filtering function is realized by using the integrally formed sub-radiation arm 200 and the filter branch 30. Compared with the radiation surface 10 in the related art in the form of a PCB, the loss caused by the PCB circuit is avoided, and the efficiency of the radiation unit 100 is improved. In addition, the radiation surface 10 and the balun 500 are directly integrally formed without welding, which reduces the number of solder joints of the entire radiation unit 100 and also reduces the cost. Furthermore, the feeder 60 is configured as a printed circuit board, which is not only less difficult to design, but also more accurate in structure than simply setting the feeder 60 as a strip line.

[0071] The filter circuit includes an open resonant ring 300, and the operating frequency of the sub-radiating arm 200 is 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 greater than the second frequency can offset the induced current on the sub-radiating arm 200. Here, the operating frequency of the sub-radiating arm 200 can be, for example, 690 MHz-960 MHz.

[0072] Embodiments of the present application Figure 1 In the figure, the radiation unit 100 is a dual-polarized radiation unit for illustration, wherein the number of the radiation arms 20 and the number of the feed baluns 50 are both two. The case where the radiation unit 100 is a single-polarized radiation unit is similar to this and is not illustrated here.

[0073] The radiation surface 10 radiates or receives radio waves through the radiation arm 20. Each sub-radiation arm 200 is integrally connected with a filter branch 30 to form at least one filter circuit including an open resonant ring 300. The operating frequency of the sub-radiation arm 200 is 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 of the electromagnetic radiation with a frequency greater than the second frequency can offset the induced current on the sub-radiation arm 200. In this way, when the electromagnetic radiation with a frequency greater than the second frequency passes through the radiation unit 100, the induced current carried on the open resonant ring 300 can maintain a good approximate equal amplitude and opposite direction with the induced current on the sub-radiation arm 200. That is, the induced current on the open resonant ring 300 of the electromagnetic radiation with a frequency greater than the second frequency can offset the induced current on the sub-radiation arm 200, and the induced current of the electromagnetic radiation with a frequency greater than the second frequency on the radiation unit 100 can be reduced or even completely eliminated, thereby filtering the electromagnetic radiation with a frequency greater than the second frequency, so as to achieve the effect that the sub-radiation arm 200 is equivalently disconnected when the frequency is higher than the second frequency and equivalently conductive when the frequency is lower than the second frequency.

[0074] Here, the integral molding of the radiation surface 10 and the balun ground 500 means that the radiation surface 10 and the balun ground 500 are an integral structural component, and the two are directly electrically connected without welding or electroplating. The material of both can be metal, for example, they can be integrally formed from the same flat metal plate through cutting, bending and other processes.

[0075] In the present application, continue to refer to Figure 1 , the upper radiation section of the sub-radiation arm 200 is 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.

[0076] 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 sub-radiating arm 200, which is beneficial to expanding the bandwidth of the filtering frequency band.

[0077] Furthermore, the sub-radiating arm 200 is a closed frame, and one or more open resonant rings 300 of different sizes are arranged on four sides of the sub-radiating arm 200 around the center of the frame. Figure 1 In the example, on one frame side of the sub-radiating arm 200, two open resonant rings 300 are defined by two groups of first segments 31, second segments 32, third segments 33 and fourth segments 34. The arrangement of the filter branches 30 on the four frame sides of the sub-radiating arm 200 is the same and will not be described in detail here. Of course, in the dual-polarized radiating unit, each sub-radiating arm 200 is arranged symmetrically relative to the center of the radiating surface.

[0078] In order to facilitate the description of the connection between the radiation arm 20 and the corresponding balun ground 500, Figure 1 The sub-radiating arms 200 and the balun ground 500 connected thereto are rotated vertically outward to obtain Figure 2 The expanded schematic diagram shown ( Figure 2 The feeding element is omitted in the figure on the lower side of the drawing). Figure 2 The upper side of the figure is a schematic diagram of the exploded structure of the radiation unit 100. Figure 2 The lower side of the figure is a schematic diagram of the expanded structure. Figure 2 and Figure 3 , the two sub-radiation arms 200 included in the same radiation arm 20 are respectively defined as a first sub-radiation arm 201 and a second sub-radiation arm 202, and the first sub-radiation arm 201 and the second sub-radiation arm 202 are arranged at intervals, the number of balun grounds 500 included in the feed balun 50 is two, and the two balun grounds 500 are respectively defined as a first balun ground 501 and a second balun ground 502. The first balun ground 501 and the second balun ground 502 are arranged at intervals from each other.

[0079] In the feeding balun 50 and the radiating arm 20 corresponding to each other, the first balun ground 501 is integrally connected to the first sub-radiating arm 201 , and the second balun ground 502 is integrally connected to the second sub-radiating arm 202 .

[0080] In the example of the dual-polarized radiation unit, the number of the radiation arms 20 and the feed balun 50 are both two, the two feed baluns 50 are respectively defined as the first feed balun 51 and the second feed balun 52, and the two radiation arms 20 are respectively defined as the first radiation arm 21 and the second radiation arm 22, so that the first feed balun 51 and the first radiation arm 21 correspond to each other, and the second feed balun 52 and the second radiation arm 22 correspond to each other.

[0081] Exemplarily, the first sub-radiating arm 201 and the second sub-radiating arm 202 of the first radiating arm 21 are respectively located in quadrants I and III of the radiating plane 10, and the first sub-radiating arm 201 and the second sub-radiating arm 202 of the second radiating arm 22 are respectively located in quadrants II and IV of the radiating plane 10, wherein quadrants I, II, III, and IV are divided by two orthogonal axes whose intersections coincide with the center of the radiating plane 10, namely, the first axis F and the second axis S. In other words, 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 orthogonally distributed in dual polarization to form two pairs of symmetrical radiating arm pairs.

[0082] When specifically connected, the first sub-radiation arm 201 and the second sub-radiation arm 202 of the first radiation 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-radiation arm 201 and the second sub-radiation arm 202 of the second radiation arm 22 are respectively connected to the first balun ground 501 and the second balun ground 502 of the second feeding balun 52. That is, the first sub-radiation arm 201 of the first radiation arm 21 is connected to the first balun ground 501 of the first feeding balun 51, and the second sub-radiation arm 202 of the first radiation arm 21 is connected to the second balun ground 502 of the first feeding balun 51. The first sub-radiation arm 201 of the second radiation arm 22 is connected to the first balun ground 501 of the second feeding balun 52, and the second sub-radiation arm 202 of the second radiation arm 22 is connected to the second balun ground 502 of the second feeding balun 52.

[0083] Here, in the example of a single-polarized radiation unit, the number of the radiation arm 20 and the feeding balun 50 are both one, for example, Figure 2 The single-polarized radiation unit 100 can be formed by removing the second radiation arm 22 and the second feed balun 52.

[0084] In the present application embodiment, combining 2 and Figure 3 The feeding element 60 includes a first feeding portion 601 , a second feeding portion 602 , and a third feeding portion 603 connected between the first feeding portion 601 and the second feeding portion 602 .

[0085] In the same feeding balun 50 , the first feeding section 601 is disposed on the first balun ground 501 and coupled to the first balun ground 501 , the second feeding section 602 is disposed on the second balun ground 502 and coupled to the second feeding section 602 , and at least a portion of the structure of the third feeding section 603 is located between the first balun ground 501 and the second balun ground 502 .

[0086] In a specific implementation, the first feeder 601, the second feeder 602 and the third feeder 603 all include a substrate 6002, and strip lines 6001 and ground layers (not shown) respectively arranged on two opposite surfaces of the substrate 6002. For the first feeder 601, the ground layer in the first feeder 601 is coupled and connected with the corresponding first balun ground 501. For the second feeder 602, the ground layer in the second feeder 602 is coupled and connected with the corresponding second balun ground 502. Of course, both ends of the strip line 6001 of the third feeder 603 are also connected to the strip line 6001 of the first feeder 601 and the strip line 6001 of the second feeder 602. The strip line 6001 of the third feeder 603 is used to couple and connect with the radiating arm 20 corresponding to the feeder 60. In this way, the signal integrity from the strip line of the feeder 60 to the feeding balun 50 is ensured. In addition, the strip line of the third feeder 603 includes portions located on two surfaces of the substrate 6002 and a via portion penetrating the substrate 6002, and portions of the strip line of the third feeder 603 located on two surfaces of the substrate 6002 are electrically connected through the via portion. In addition, a set of corresponding feeders 60 and the balun ground 500 can be fixed by plastic studs.

[0087] Furthermore, combined with Figure 3 and Figure 4 The number of the feeders 60 is two, and the two feeders 60 are respectively defined as a first feeder 61 and a second feeder 62 .

[0088] In the first feeding balun 51, the first feeding section 601 and the second feeding section 602 of the first feeding element 61 are respectively arranged on the opposite sides of the first balun ground 501 and the second balun ground 502 of the first feeding balun 51 along the extending direction of the second axis S. In the second feeding balun 52, the first feeding section 601 and the second feeding section 602 of the second feeding element 62 are respectively arranged on the opposite sides of the first balun ground 501 and the second balun ground 502 of the second feeding balun 52 along the extending direction of the first axis F.

[0089] One of the third feeding portion 603 of the first feeding element 61 and the third feeding portion 603 of the second feeding element 62 is overlapped on the other one.

[0090] 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.

[0091] The first balun ground 501 and the second balun ground 502 of the first feeding balun 51 are arranged at intervals along the extending 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 .

[0092] 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 .

[0093] 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 2 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 are spaced apart from each other 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 200, so that the first feeding element 61 and the second feeding element 62 that cross in the space can be installed and inserted into the space Z from one side of the radiation surface 10.

[0094] Further, continue to refer to Figure 2 and Figure 4 The radiation unit 100 also includes a base 40, which 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.

[0095] In this way, the radiation surface 10, the balun ground 500, and the base 40 can be integrally formed.

[0096] Combination Figure 5 and Figure 6 The embodiment of the present application further provides an antenna device 1000, comprising a reflector 310 and the aforementioned radiation unit 100. The reflector 310 comprises a first surface 311 and a second surface 312 which are arranged opposite to each other along the thickness direction.

[0097] The balun ground 500 of the radiation unit 100 is electrically connected to the first surface 311 , and one end of the feeding element 60 away from the radiation surface 10 passes through the reflection plate 310 and extends to the second surface 312 of the reflection plate 310 .

[0098] Furthermore, the antenna device 1000 further includes a cable 320 , the inner conductor of the cable 320 is electrically connected to the strip line of the feeder 60 extending to one side of the second surface 312 of the reflector, and the outer conductor of the cable 320 is welded to the ground layer of the feeder 60 .

[0099] It can be understood that the outer conductor of the cable 320 and the grounding layer of the feeder 60 are welded, the grounding layer is coupled and connected with the corresponding balun ground 500, the balun ground 500 and the base 40 are formed integrally, and the base 40 and the reflector 310 are coupled and connected, so that the outer conductor of the cable 320 and the reflector 310 are electrically connected.

[0100] 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.

[0101] Reference Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 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:

[0102] S10. Cut the flat metal plate to form a pre-processed part 80, wherein the pre-processed part 80 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, and the sub-radiating arms 200 are integrally connected with the filter branches 30 to form at least one filter circuit.

[0103] S20, each sub-radiating arm 200 is vertically bent relative to the corresponding extension portion 82 toward a first side in the thickness direction of the metal plate. Here, the first side in the thickness direction of the metal plate may be, for example, Fig. 9 The lower side shown in the middle figure.

[0104] 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.

[0105] In the embodiment of the present application, the metal plate may be a flat metal plate, which is formed into a pre-processed piece by cutting and other processes. Here, a dual-polarized radiation unit is used as an example for description, and the case where the radiation unit 100 is single-polarized is similar to this, which will not be repeated here.

[0106] In the radiation unit 100 manufactured by the above method, because it is formed by bending the same flat metal plate, there is no need for many PCB solder joints. Also, because of the inherent hardness of the metal, it can support the balun ground 500 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 ground 500 do not need to be electroplated, the cost is also reduced.

[0107] 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 V, VI, VII, and VIII, 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.

[0108] Combine 2 and Fig. 9 , the four extensions 82 are respectively located in quadrants V, VI, VII, and VIII, and the four sub-radiation arms 200 are also located in quadrants V, VI, VII, and VIII in one-to-one correspondence with the four extensions 82. Finally, the sub-radiation arm 200 located in quadrant VIII forms the first sub-radiation arm 201 of the first radiation arm 21, the sub-radiation arm 200 located in quadrant V forms the first sub-radiation arm 201 of the second radiation arm 22, the sub-radiation arm 200 located in quadrant VI forms the second sub-radiation arm 202 of the first radiation arm 21, and the sub-radiation arm 200 located in quadrant VII forms the second sub-radiation arm 202 of the second radiation arm 22.

[0109] The extension portion 82 located in quadrant VIII forms the first balun ground 501 of the first feed balun 51 , the extension portion 82 located in quadrant VI forms the second balun ground 502 of the first feed balun 51 , the extension portion 82 located in quadrant VII forms the second balun ground 502 of the second feed balun 52 , and the extension portion 82 located in quadrant V forms the first balun ground 501 of the second feed balun 52 .

[0110] Of course, after step S30, combined with Figure 2 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.

[0111] 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.

[0112] Furthermore, combined with Figure 8 and Fig.11In step S10, in the step of forming a pre-processed part, 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 along 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.

[0113] In step S30 , the step of vertically bending the extension portion 82 relative to the central portion 81 toward the second side specifically includes: bending the extension portion 82 at the end position of the first notch segment 831 away from the second notch segment 832 .

[0114] The various performances of the radiation unit of the embodiment of the present application are tested below.

[0115] Fig.12 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. In the radiation unit of the related art, the radiation surface adopts the form of PCB. Fig.12 In the figure, the horizontal axis is the operating frequency of the radiation unit, and the vertical axis is the efficiency value. Fig.12 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).

[0116] Fig.13 The standing wave diagram of the radiation unit provided in the embodiment of the present application. Fig.13 In the figure, the horizontal axis is the operating frequency of the radiation unit, and the vertical axis is the standing wave magnitude. Fig.13 The black and gray curves are the standing wave tangent diagrams of two orthogonal polarizations, respectively. Fig.13 It can be seen that in the radiation unit 100 of the present application, within its working frequency band, the peak values ​​of the standing wave magnitudes of the two polarizations are both around 1.5, which can meet the basic requirements for the radiation unit.

[0117] Fig.14 The oscillator pattern of the radiating unit provided in the embodiment of the present application. Fig.14 In the figure, the horizontal axis is the angle of the plane pattern and the vertical axis is the gain. Fig.14 In the figure, thirteen oscillator direction curves are illustrated when the angle Phi between the X axis and the YZ plane in the radiation pattern is 90° and the frequencies are 0.69GHz, 0.703GHz, 0.718GHz, 0.733GHz, 0.758GHz, 0.773GHz, 0.788GHz, 0.8GHz, 0.807GHz, 0.822GHz, 0.832GHz, 0.847GHz, and 0.862GHz. Fig.14It can be seen that the radiation unit 100 of the embodiment of the present application has better consistency in the directional pattern curves at the above-mentioned frequencies, and the peak average is between 8dB-9dB. It can be seen that the radiation unit 100 of the embodiment of the present application has better performance.

[0118] 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.

[0119] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radiation unit, characterized in that: Including radiating surface and balun; The radiation surface includes at least one radiation arm in a polarization direction, the balun includes at least one feeding balun, and the radiation arm and the feeding balun are arranged in a one-to-one correspondence; The feeding balun comprises a balun ground and a feeding element, and the balun ground and the radiating surface are integrally formed; The feeder is configured as a printed circuit board, the feeder is arranged on the balun ground, the grounding layer of the feeder is coupled and connected to the balun ground; the feeder is also coupled and connected to the corresponding radiation arm; Wherein, the radiation surface further includes a filter branch, the radiation arm includes two sub-radiation arms, and each of the sub-radiation arms is integrally connected with the filter branch to form at least one filter circuit.

2. The radiation unit according to claim 1, characterized in that: The filter circuit includes an open resonant ring, the operating frequency of the sub-radiating arm is 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 sub-radiating arm.

3. The radiation unit according to claim 2, characterized in that: The upper radiation section of the sub-radiation arm is defined as a first segment, the filtering branch includes a second segment arranged opposite to the first segment, a third segment connected to the same end of the first segment and the second segment, and a fourth segment connected to an end of the first segment away from the third segment, and the first segment, the second segment, the third segment and the fourth segment jointly define an open resonant ring; An end of the fourth segment away from the first segment is spaced apart from an end of the second segment away from the third segment to define an opening of the open resonant ring.

4. The radiation unit according to any one of claims 1 to 3, characterized in that: The two sub-radiating arms included in the same radiating arm are defined as a first sub-radiating arm and a second sub-radiating arm respectively, the first sub-radiating arm and the second sub-radiating arm are arranged at an interval, the feeding balun includes two balun grounds arranged at an interval, and the two balun grounds are defined as a first balun ground and a second balun ground; In the feeding balun and the radiating arm corresponding to each other, the first balun ground is integrally connected to the first sub-radiating arm, and the second balun ground is integrally connected to the second sub-radiating arm.

5. The radiation unit according to claim 4, characterized in that: The feeder comprises a first feeder, a second feeder, and a third feeder connected between the first feeder and the second feeder; In the same feeding balun, the first feeding part is arranged at the first balun ground and coupled to the first balun ground, the second feeding part is arranged at the second balun ground and coupled to the second feeding part, and at least part of the structure of the third feeding part is located between the first balun ground and the second balun ground.

6. The radiation unit according to claim 5, 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 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.

7. The radiation unit according to claim 6, characterized in that: The number of the feeders is two, and the two feeders are defined as a first feeder and a second feeder respectively; and the two orthogonal axes are defined as a first axis and a second axis; In the first feeding balun, the first feeding portion and the second feeding portion of the first feeding element are respectively arranged on opposite sides of the first balun ground and the second balun ground of the first feeding balun along the extension direction of the second axis; in the second feeding balun, the first feeding portion and the second feeding portion of the second feeding element are respectively arranged on opposite sides of the first balun ground and the second balun ground of the second feeding balun along the extension direction of the first axis; One of the third feeding portion of the first feeding element and the third feeding portion of the second feeding element is overlapped on the other one.

8. The radiation unit according to claim 7, characterized in that: In the same feeding balun, the first balun ground and the second balun ground are arranged in parallel; 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; 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.

9. The radiation unit according to claim 6, characterized in that: The radiation unit also includes a base, which includes a main body and four connecting arms extending outward from the main body, and the four connecting arms are respectively and integrally 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.

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 balun ground of the radiation unit is electrically connected to the first surface, and one end of the feeding element away from the radiation surface passes through the reflection plate and extends to the second surface side of the reflection plate.

11. The antenna device according to claim 10, characterized in that: It also includes a cable, the inner conductor of the cable is electrically connected to the strip line of the feeder extending to one side of the second surface of the reflector; the outer conductor of the cable is welded to the ground layer of the feeder.

12. A method for manufacturing a radiation unit, characterized in that: Used to manufacture the radiation unit according to claim 9, the manufacturing method of the radiation unit comprising: 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.

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