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 radiation surface comprises at least one radiation arm in a polarization direction, and the balun comprises at least one feed balun; the feed balun comprises a feed part and two balun grounds which are arranged at an interval, the radiation arm comprises two sub-radiation arms which are arranged at an interval, and the two sub-radiation arms and the two balun grounds are integrally formed in a one-to-one correspondence manner; the balun grounds and the base are configured to be an integrated bending piece formed by bending the balun grounds relative to the base, the balun grounds comprise mounting surfaces on the front sides of the bending directions, and the feed piece is arranged on the two mounting surfaces of the two balun grounds and forms a strip line transmission line with the two balun grounds. According to the radiation unit, the manufacturing method thereof and the antenna device, the cross polarization is better, the connection is simple, and the cost is lower.

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 transmit and receive electromagnetic waves in a direction, thereby realizing wireless communication. In order to reduce costs, the current radiation units mostly use sheet metal bending oscillators. By opening a notch in the plate-shaped sheet metal material, the sheet metal material at the notch position is bent downward to form a balun ground, forming the sheet metal material with the notch as the radiation surface, and then fixing the balun ground to the reflector through the PCB base. However, the radiation unit in the related art has the problems of poor cross-polarization, complex connection between the balun ground and the base, 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 better cross-polarization, simple connection, and low cost.

[0004] On one hand, an embodiment of the present application provides a radiation unit, including a radiation surface, a balun and a base, wherein the radiation surface includes at least one radiation arm in a polarization direction, and the balun includes at least one feeding balun;

[0005] The feeding balun includes a feeding element and two balun grounds spaced apart from each other, the radiating arm includes two sub-radiating arms spaced apart from each other, and the two sub-radiating arms are integrally formed in a one-to-one correspondence with the two balun grounds;

[0006] The balun ground and the base are constructed as an integral bent piece formed by bending the balun ground relative to the base. The balun ground includes a mounting surface along the front side of the bending direction. The feeding element is arranged on the two mounting surfaces of the two balun grounds and forms a stripline transmission line with the two balun grounds.

[0007] In one embodiment, a virtual reference plane is defined between two corresponding balun grounds;

[0008] The mounting surfaces of the two corresponding balun grounds are both located on the side of the balun ground facing the reference plane;

[0009] There is a gap between the ends of the two corresponding balun grounds that are away from the base, for inserting the feeding element between the mounting surfaces of the two balun grounds.

[0010] In one embodiment, the orthographic projections of the mounting surfaces of the two baluns on the reference plane have an overlapping area;

[0011] The orthographic projection of the feed element on the reference plane is located within the overlap region.

[0012] In one embodiment, the feeding element includes a first feeding segment, a second feeding segment and a third feeding segment connected in sequence, the first feeding segment and the third feeding segment are respectively connected to the mounting surfaces of two balun grounds, and the second feeding segment is suspended between the mounting surfaces of the two balun grounds.

[0013] In one embodiment, the sub-radiating arm includes two first supporting arms and two first extension portions configured in a sheet shape;

[0014] The two first support arms are connected to both side ends of the balun ground in the width direction and extend to a side away from the mounting surface, and the width direction of the balun ground is perpendicular to the height direction and the thickness direction of the balun ground;

[0015] The two first extensions are respectively connected to the opposite inner sides of the two first support arms along the width direction, and the first edges of the two first extensions facing away from the corresponding first support arms are spaced apart from each other;

[0016] The first extension portions of the sub-radiating arms are arranged in the same plane.

[0017] In one embodiment, the first edges of the two first extensions of the same sub-radiating arm are parallel to each other; the edge of the first extension connected to the corresponding first supporting arm is defined as the second edge;

[0018] The included angle α between the first edge and the second edge of the first extension portion satisfies:

[0019] 0°≤α≤45°.

[0020] In one embodiment, the corresponding first support arm and first extension portion are constructed as an integral bent piece formed by bending the first extension portion relative to the first support arm.

[0021] In one of the embodiments, the radiating element is configured as a dual-polarized radiating element;

[0022] The number of radiating arms and feeding baluns are both two;

[0023] Each sub-radiation arm and each corresponding balun ground are arranged in an axisymmetric and center-symmetrical manner relative to the center of the radiation surface.

[0024] In one embodiment, the number of the feeding elements is two, and the two feeding elements are arranged crosswise with each other at an interval in the height direction of the balun.

[0025] In one embodiment, the base includes a main body and four mounting arms extending outwardly from the main body;

[0026] Each balun ground is connected to the outer contour edge of the main body, and a balun ground is provided between every two adjacent mounting arms.

[0027] In one embodiment, the orthographic projections of the mounting surfaces of the two baluns on the reference plane are staggered;

[0028] A partial area of ​​the orthographic projection of the feeding element on the reference plane is located between the orthographic projections of the two baluns on the reference plane.

[0029] In one of the embodiments, the mounting surfaces of the two balun grounds are parallel to the reference plane, the feeding element is constructed as a sheet-like element and includes a first feeding segment, a second feeding segment and a third feeding segment connected in sequence, the first feeding segment and the third feeding segment are respectively connected to the mounting surfaces of the two balun grounds, and the second feeding segment is suspended between the mounting surfaces of the two balun grounds.

[0030] In one embodiment, the sub-radiating arm includes a second supporting arm and a sheet-shaped second extending portion connected to each other; the second supporting arm is connected to the balun ground;

[0031] Each second extension portion is perpendicular to the corresponding balun ground, and all the second extension portions are coplanarly arranged.

[0032] In one embodiment, in the radiation unit, at least one of the following conditions is satisfied:

[0033] 1) The second extension portion is constructed as a long strip extending in a direction away from the balun ground, and the length L1 of the second extension portion is 1 / 4λ, where λ is the wavelength corresponding to the center frequency of the radiation unit;

[0034] 2) The height H of the balun is 1 / 4λ.

[0035] In one embodiment, the radiation unit is configured as a dual-polarization radiation unit with mutually orthogonal polarization directions; the number of radiation arms and the number of feed baluns are both two; the two sub-radiation arms included in the radiation arm extend along the polarization direction of the corresponding radiation arm;

[0036] The sub-radiating arm and the corresponding balun ground are constructed as an integral bent piece formed by bending the sub-radiating arm relative to the balun ground; and the sub-radiating arm and the corresponding balun ground are perpendicular to each other;

[0037] Each sub-radiating arm and each corresponding balun ground are arranged in centrosymmetry with respect to the center of the radiating surface.

[0038] In one embodiment, the corresponding second extension portion and the second support arm are constructed as an integral bent piece.

[0039] In one embodiment, the radiation unit is configured as a dual-polarization radiation unit; the number of the radiation arms and the number of the feed baluns are both two;

[0040] The number of the feeding elements is two, and the two feeding elements are cross-arranged with each other at an interval in the height direction of the balun.

[0041] In one of the embodiments, the base is provided with a through hole, and one end of the feeding element passes through the through hole and extends to a side of the base away from the radiation surface.

[0042] In one embodiment, the radiation unit is configured as a dual-polarization radiation unit with mutually orthogonal polarization directions; the number of the radiation arms and the number of the feed baluns are both two;

[0043] When the sub-radiating arm and the balun are unfolded in the opposite direction of their own bending direction to be in the same plane as the base to form an intermediate structure, the intermediate structure is located in a square area of ​​1 / 2λX 1 / 2λ, where λ is the wavelength corresponding to the center frequency of the radiation unit.

[0044] On the other hand, the present application further provides an antenna device, including a reflector and the above-mentioned radiation unit, wherein a base of the radiation unit is arranged on the reflector.

[0045] On the other hand, the present application further 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:

[0046] Cutting the planar metal plate to form a pre-processed part, wherein the pre-processed part includes a central part, at least two balun parts extending outward from the central part, and radiation parts connected to the balun parts in a one-to-one correspondence;

[0047] Bend at least a portion of each radiating portion relative to the corresponding balun portion, and make at least a portion of the radiating portion coplanar;

[0048] The balun portions are bent perpendicularly relative to the central portion toward the same side of the central portion.

[0049] In one embodiment, a first cutting notch is formed at a connection position between each balun portion and the central portion;

[0050] In the step of vertically bending each balun portion relative to the center portion toward the same side of the center portion:

[0051] The balun parts are bent at positions of the cutting ends of the balun parts corresponding to the first cutting notches.

[0052] In one embodiment, the radiation part is constructed as a long strip, and the radiation part is connected to the side of the corresponding balun part away from the first cutting notch; a second cutting notch is formed at the connection position between each balun part and the corresponding radiation part;

[0053] In the step of bending at least a portion of each radiating portion relative to the corresponding balun portion:

[0054] Bend the partial structure of each radiating portion corresponding to the second cutting notch relative to the corresponding balun portion, and the bending operation on the radiating portion and the bending operation on the balun portion are in the same bending direction; or

[0055] Each radiating portion is bent relative to the corresponding balun portion, and the bending direction of the radiating portion is opposite to that of the balun portion.

[0056] In one embodiment, the radiation portion includes two first support arm preforms and two first extension portion preforms;

[0057] One end of the two first support arm preforms is connected to the end of the balun portion away from the central portion, and the two first support arm preforms are located on both sides of the width direction of the corresponding balun portion, and the two first extension portion preforms are connected one by one to the side of the two first support arm preforms facing the central portion;

[0058] The step of bending at least a portion of each radiating portion relative to the corresponding balun portion comprises:

[0059] The first extension part preform is bent vertically toward the first side relative to the corresponding first support arm preform, and the two first support arm preforms are bent toward the first side at the same angle relative to the corresponding balun part, so that the two first extension part preforms are coplanar and there is a spacing between the edges of the two first extension part preforms that are away from the corresponding first support arm preform.

[0060] In one embodiment, in the step of vertically bending each balun portion relative to the central portion toward the same side of the central portion:

[0061] The bending of the balun portion is performed toward the second side, the first side and the second side being opposite sides of the planar metal sheet.

[0062] In one embodiment, the center portion includes a main body and four mounting arms extending outwardly from the main body;

[0063] The manufacturing method of the radiation unit also includes bending one of the mounting arms vertically toward the first side relative to the main body.

[0064] Beneficial effects of the above-mentioned radiation unit, manufacturing method thereof, and antenna device:

[0065] The two sub-radiating arms and the two balun grounds are integrally formed in one-to-one correspondence, and the balun ground and the base are constructed as an integral bent piece formed by bending the balun ground relative to the base. Therefore, the sub-radiating arms, the balun ground and the base are integrally formed, and no welding or assembly is required between the sub-radiating arms, the balun ground and the base, which reduces the number of welding points of the entire radiation unit, simplifies the connection, and reduces the cost. In addition, the radiation unit can be connected to the reflector through the base, so that the connection between the radiation unit and the reflector becomes relatively simple.

[0066] On the other hand, by arranging the two sub-radiating arms at intervals and not being connected to each other, the problems of incomplete linearity of the current and low polarization purity can be avoided, thereby achieving better cross polarization. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application;

[0068] Figure 2 for Figure 1 A top view of the radiation unit shown;

[0069] Figure 3 A schematic diagram of a radiation unit provided in an embodiment of the present application from another angle;

[0070] Figure 4 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application;

[0071] Figure 5 for Figure 4 A cross-sectional view of the radiation unit shown in a top view;

[0072] Figure 6 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application;

[0073] Figure 7 for Figure 6 A schematic diagram of one of the reference planes is shown in the radiating element;

[0074] Figure 8 It is a schematic diagram of a structure in which the mounting surface of the radiation unit is located on the back side of the bending direction of the balun;

[0075] Fig. 9 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application;

[0076] Fig.10 A schematic diagram of a pre-processed part formed in the method for manufacturing a radiation unit provided in an embodiment of the present application;

[0077] Fig.11A schematic diagram of a pre-processed part of another structure formed in the method for manufacturing a radiation unit provided in an embodiment of the present application;

[0078] Fig.12 for Fig.11 A schematic diagram of the three-dimensional structure of a pre-processed part;

[0079] Fig.13 For Fig.12 A schematic diagram of a pre-processed part being processed to a first state;

[0080] Fig.14 For Fig.13 A schematic diagram of a pre-processed part being processed to a second state;

[0081] Fig.15 A schematic diagram of a pre-processed part of another structure formed in the method for manufacturing a radiation unit provided in an embodiment of the present application;

[0082] Fig.16 for Figure 1 The vertical plane radiation pattern of the radiating element shown;

[0083] Fig.17 for Figure 1 The horizontal plane radiation pattern of the radiating element shown;

[0084] Fig.18 for Figure 1 The horizontal plane cross-polarization ratio of the radiating element shown;

[0085] Fig.19 for Figure 1 The standing wave curve diagram of the radiating unit shown;

[0086] Fig. 20 for Figure 6 The vertical plane radiation pattern of the radiating element shown;

[0087] Fig.21 for Figure 6 The horizontal plane radiation pattern of the radiating element shown;

[0088] Fig. 22 for Figure 6 The horizontal plane cross-polarization ratio of the radiating element shown;

[0089] Fig.23 for Figure 6 The standing wave curve of the radiating element is shown.

[0090] Description of Figure Numbers:

[0091] 100. Radiating unit;

[0092] 10. Radiating surface;

[0093] 20, radiation arm; 200, sub-radiation arm; 211, first support arm; 212, first extension portion; 2121, first edge; 2122, second edge; 221, second support arm; 222, second extension portion;

[0094] 30, balun; 300, feed balun; 310, feed element; 311, first feed section; 312, second feed section; 313, third feed section; 320, balun ground;

[0095] 40. base; 41. main body; 42. mounting arm; 43. through hole; 44. outer guide; 45. mounting hole;

[0096] 50. pre-processed part; 51. central part; 52. balun part; 53. radiation part; 531. first support arm preform; 532. first extension part preform; 54. first cutting notch; 541. crease; 55. second cutting notch;

[0097] 1000, antenna device; 1020, cable;

[0098] F, mounting surface; Z, reference plane, W, width direction. DETAILED DESCRIPTION

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] The radiation unit and antenna device of the embodiments of the present application are described below with reference to the accompanying drawings.

[0106] Figure 1 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application; Figure 2 for Figure 1 A top view of the radiation unit shown; Figure 3 A schematic diagram of a radiation unit provided in an embodiment of the present application from another angle; Figure 4 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application; Figure 5 for Figure 4 A cross-sectional view of the radiation unit shown in a top view; Figure 6 A schematic diagram of another structure of a radiation unit provided in an embodiment of the present application; Figure 7 for Figure 6 A schematic diagram of one of the reference planes is shown in the radiating element; Figure 8 It is a schematic diagram of the structure in which the mounting surface of the radiation unit is located on the back side of the bending direction of the balun.

[0107] Reference Figure 1 , Figure 4 , Figure 6 In the radiation unit 100 provided in the embodiment of the present application, after the feeding component, cables, etc. are disassembled, the schematic diagram shown in the lower left corner of the figure is obtained.

[0108] The radiation unit 100 provided in the embodiment of the present application includes a radiation surface 10 , a balun 30 and a base 40 . The radiation surface 10 includes a radiation arm 20 in at least one polarization direction, and the balun 30 includes at least one feeding balun 300 .

[0109] The feeding balun 300 includes a feeding element 310 and two balun grounds 320 spaced apart from each other. The radiating arm 20 includes two sub-radiating arms 200 spaced apart from each other. The two sub-radiating arms 200 and the two balun grounds 320 are integrally formed in a one-to-one correspondence.

[0110] The balun ground 320 and the base 40 are constructed as an integral bent piece formed by bending the balun ground 320 relative to the base 40 . The balun ground 320 includes a mounting surface F along the front side of the bending direction. The feeding element 310 is arranged on the two mounting surfaces F of the two balun grounds 320 and forms a stripline transmission line with the two balun grounds 320 .

[0111] The two sub-radiating arms 200 and the two balun grounds 320 are integrally formed in one-to-one correspondence, and the balun ground 320 and the base 40 are constructed as an integral bent piece formed by bending the balun ground 320 relative to the base 40. Therefore, the sub-radiating arms 200, the balun ground 320 and the base 40 are integrally formed, and no welding or assembly is required between the sub-radiating arms 200, the balun ground 320 and the base 40, thereby reducing the number of welding points of the entire radiation unit 100, simplifying the connection, and reducing the cost. In addition, the radiation unit 100 can be connected to a reflector (not shown) through the base 40, so that the connection between the radiation unit 100 and the reflector becomes relatively simple.

[0112] On the other hand, the two sub-radiating arms 200 included in one radiating arm 20 are spaced apart from each other and are not connected to each other, which can avoid the problems of incomplete linearity of current and low polarization purity, and make the cross polarization better.

[0113] Furthermore, since the feeder 310 is disposed on two mounting surfaces F of the two balun grounds 320, and the mounting surface F is the surface of the balun ground 320 located on the front side in the bending direction, the installation reliability of the feeder 310 is higher than that of the feeder 310 disposed on the back side in the bending direction of the balun ground 320. This is because the balun ground 320 and the base 40 are bent and formed. After the bending and forming is completed, since the two balun grounds 320 are spaced apart from each other, the corresponding two sub-radiating arms 200 are also spaced apart. The balun ground 320 has a tendency to unbend in the reverse direction along the bending direction. If Figure 8 As shown in the figure, the mounting surface F is located on the back side of the bending direction of the balun ground 320. As the balun ground 320 is unbent in the opposite direction of the bending direction, the space for installing the feeder 310 formed between the two mounting surfaces F becomes smaller, resulting in the inability to install the feeder 310. If the mounting surface F is located on the front side of the bending direction of the balun ground 320, even if the balun ground 320 has a tendency to unbend in the opposite direction of the bending direction, the installation space between the two mounting surfaces F will not become smaller, and the installation of the feeder 310 will not be affected.

[0114] In some embodiments, continue to refer to Figure 1 , Figure 4 and Figure 6 The sub-radiating arm 200 and the corresponding balun ground 320 are also constructed as an integral bent piece formed by bending the sub-radiating arm 200 relative to the balun ground 320. Figure 1 , Figure 6 In the example of , the bending direction of the sub-radiating arm 200 relative to the balun ground 320 and the bending direction of the balun ground 320 relative to the base 40 may be opposite. Figure 4 In the example, the bending direction of the sub-radiating arm 200 relative to the balun ground 320 and the bending direction of the balun ground 320 relative to the base 40 can be the same, for example, both can be bent toward the upper side of the drawing.

[0115] In the embodiment of the present application, the radiation unit 100 is a dual-polarization radiation unit as an example for description. In this case, the number of the radiation arm 20 and the feed balun 300 are both two, and the two radiation arms 20 are respectively located in two orthogonal polarization directions. In the case where the radiation unit 100 is a single-polarization radiation unit, the number of the radiation arm 20 and the feed balun 300 are both one. The case where the radiation unit 100 is single-polarization is similar to the dual-polarization case, and will not be repeated here.

[0116] The feeder 310 may be, for example, a metal air strip line, or may be a PCB printed circuit board. In the embodiment of the present application, the feeder 310 is an example of a metal air strip line, and the feeder 310 and the corresponding two balun grounds 320 have a spacing to achieve coupling connection, so that the feeder 310 and the two balun grounds 320 form a stripline transmission line. The feeder 310 and the corresponding balun grounds 320 may be connected by a plastic fastener or the like.

[0117] The two sub-radiating arms 200 and the two balun grounds 320 are integrally formed in a one-to-one correspondence, which means that one of the sub-radiating arms 200 is integrally formed with one balun ground 320 , and the other sub-radiating arm 200 is integrally formed with the other balun ground 320 .

[0118] Further, the balun ground 320 and the base 40 are constructed as an integral bent piece formed by bending the balun ground 320 relative to the base 40, which means that the balun ground 320 is bent relative to the base 40 in a preset bending direction, thereby forming an integral balun ground 320 and base 40. The balun ground 320 includes a mounting surface F along the front side of the bending direction, wherein the mounting surface F along the front side of the bending direction refers to the frontmost surface of the balun ground 320 along the bending direction during the relative bending of the balun ground 320 and the base 40. That is, during the bending process of a group of paired balun grounds 320, the surfaces of the balun ground 320 that face each other and are close to each other with the base 40.

[0119] In some embodiments, the balun ground 320 may be disposed perpendicular to the base 40 .

[0120] In the present application, refer to Figure 2 , Figure 5 , Figure 7 , a virtual reference plane Z located between the two corresponding balun grounds 320 is defined. The mounting surfaces F of the two corresponding balun grounds 320 are both located on the side of the balun ground 320 facing the reference plane Z. There is a gap between the ends of the two corresponding balun grounds 320 away from the base 40 for the feeding member 310 to be inserted between the mounting surfaces F of the two balun grounds 320.

[0121] In this configuration, the feeding element 310 can be inserted between two balun grounds 320 from a side of the balun grounds 320 facing away from the base 40 .

[0122] The mounting surfaces F of the two balun grounds 320 are both arranged toward the reference plane Z, so that the feeder 310 can be mounted between the two mounting surfaces F. The two mounting surfaces F can be parallel to each other or have a certain angle. The sub-radiating arm 200 can be mounted at the end of the corresponding balun ground 320 away from the base 40.

[0123] Specifically, in Figure 2In the example, the schematic diagram on the upper side of the figure is a top view, and the schematic diagram on the lower side of the figure is a cross-sectional view obtained by cutting at a preset position in the height direction of the radiation unit 100. Since a reference plane Z is provided between a set of corresponding baluns 320, Figure 2 In the dual-polarized radiation unit shown, the upper schematic diagram only shows one set of reference planes Z between the corresponding balun grounds 320, and the lower schematic diagram only shows another set of reference planes Z between the corresponding balun grounds 320. Figure 5 In the example, the reference planes Z corresponding to the two sets of corresponding baluns 320 are illustrated. Figure 7 In the example, only a set of corresponding reference planes Z between the balun grounds 320 are shown.

[0124] In the present application, refer to Figure 1 , Figure 2 As a possible implementation, the orthographic projections of the mounting surfaces F of the two baluns 320 on the reference plane Z have an overlapping area. The orthographic projection of the feeding element 310 on the reference plane Z is located in the overlapping area.

[0125] That is, the mounting surfaces F of the two balun grounds 320 have mounting areas facing each other, and a facing space is defined between the mounting areas of the two balun grounds 320, and the feeder 310 is located in the facing space. In some embodiments, the projections of the mounting surfaces F of the two balun grounds 320 on the reference plane Z may completely overlap, so that the two balun grounds 320 completely face each other, and the symmetry of the radiation surface 10 is also better. Alternatively, the projections of the mounting surfaces F of the two balun grounds 320 on the reference plane Z may partially overlap.

[0126] At this time, the distance between the two mounting surfaces F may be greater than the outer contour size of the feeding element 310 , so that the feeding element 310 can be accommodated between the two mounting surfaces F.

[0127] Further, continue to refer to Figure 1 and Figure 3 , Figure 3 In the figure, for ease of observation, the feeding element 310 is moved to the upper side and enlarged to show that the feeding element 310 includes a first feeding segment 311, a second feeding segment 312 and a third feeding segment 313 which are connected in sequence, the first feeding segment 311 and the third feeding segment 313 are respectively connected to the mounting surfaces F of the two balun grounds 320, and the second feeding segment 312 is suspended between the mounting surfaces F of the two balun grounds 320.

[0128] In a specific implementation, the feeder 310 can be a long strip-shaped member bent along its thickness direction. For example, for a long strip-shaped member, two points in the length direction are bent twice toward the same side in the thickness direction, so as to form Figure 3The feeding element 310 shown in FIG. 1 is a feeding element 310 . The length of the first feeding section 311 is less than the length of the third feeding section 313 . The third feeding section 313 can extend toward the base 40 and penetrate the base 40 , thereby being electrically connected to the inner conductor of the cable 1020 .

[0129] In the embodiment of the present application, Figure 1 , Figure 2 , Figure 3 In the embodiment, the two sub-radiating arms 200 are both located on the side of the corresponding balun ground 320 away from the mounting surface F. At this time, the end of the mounting surface F of the balun ground 320 away from the base 40 is not blocked by any component, so that the feeding element 310 can be directly inserted between the mounting surfaces F of the two balun grounds 320.

[0130] Further, continue to refer to Figure 3 The sub-radiating arm 200 includes two first supporting arms 211 and two first extending portions 212 in a sheet shape. The two first supporting arms 211 are connected to both side ends of the balun ground 320 in the width direction W and extend to a side away from the mounting surface F. The width direction W of the balun ground 320 is perpendicular to both the height direction and the thickness direction of the balun ground 320.

[0131] The two first extensions 212 are respectively connected to the opposite inner sides of the two first support arms 211 along the width direction W, and there is a gap between the first edges 2121 of the two first extensions 212 away from the corresponding first support arms 211 . The gap forms a slit between the two first extensions 212 .

[0132] In the embodiment of the present application, the first extension portions 212 of each sub-radiating arm 200 are arranged on the same plane and the first extension portions 212 of each sub-radiating arm 200 are perpendicular to the corresponding balun ground 320 .

[0133] In a specific implementation, each first extension portion 212 may be disposed at the end portion of the corresponding first support arm 211 facing the base 40 .

[0134] In the embodiment of the present application, the first edges 2121 of the two first extensions 212 of the same sub-radiating arm 200 are parallel to each other. The edge of the first extension 212 connected to the corresponding first supporting arm 211 is defined as the second edge 2122 .

[0135] The included angle α between the first edge 2121 and the second edge 2122 of the first extension portion 212 satisfies:

[0136] 0°≤α≤45°. Preferably 22.5°. Such an arrangement enables the radiation unit 100 to have better performance. It should be noted that when the angle between the first edge 2121 and the second edge 2122 changes, the angle between the second edges 2122 of the two first extensions 212 of the same sub-radiating arm 200 changes when viewed from above, while ensuring that the spacing between the first edges 2121 of the two first extensions 212 does not change.

[0137] The first edges 2121 of the two first extension portions 212 of the same sub-radiating arm 200 may be parallel to each other, so that a rectangular gap is formed between the two first edges 2121 . The center line of the gap passes through the center of the radiating surface 10 .

[0138] In the embodiment of the present application, the corresponding first support arm 211 and first extension portion 212 are constructed as an integral bent piece formed by bending the first extension portion 212 relative to the first support arm 211. The first extension portion 212 may be perpendicular to the balun ground 320 and parallel to the base 40.

[0139] Furthermore, in an embodiment where the radiation unit 100 is configured as a dual-polarization radiation unit 100 and the number of the radiation arms 20 and the feed balun 300 are both two, each sub-radiation arm 200 and each corresponding balun ground 320 are arranged axially and centrosymmetrically relative to the center of the radiation surface 10 .

[0140] In addition, one of the radiation arms 20 is located in one polarization direction, and the other radiation arm 20 is located in another orthogonal polarization direction. In this case, the four sub-radiation arms 200 are arranged at intervals from each other.

[0141] Continue to refer to Figure 3 The number of the feeding elements 310 is two, and the two feeding elements 310 are arranged crosswise with each other in a height direction of the balun 320 .

[0142] In this way, space can be saved. The two feeders 310 cross each other at the second feed section 312 , and the mounting surfaces F of the four balun grounds 320 together define a square mounting space, and the two feeders 310 are located in the mounting space.

[0143] Continue to refer to Figure 1 The base 40 includes a main body 41 and four mounting arms 42 extending outward from the main body 41 .

[0144] Each balun ground 320 is connected to the outer contour edge of the main body 41 , and one balun ground 320 is provided between every two adjacent mounting arms 42 .

[0145] In this way, the spacing between the four baluns 320 can be reduced, and the mounting arm 42 extends outward from the main body 41 and can have a longer size, so that the overall outer contour of the base 40 is larger and the supporting performance is better after being connected to the reflector.

[0146] In some embodiments, at least one mounting arm 42 is bent away from the radiation surface 10 to form an outer conductor 44 . The outer conductor 44 may be partially electroplated to be electrically connected to the outer conductor of the cable 1020 .

[0147] In the present application, refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 In the embodiment, the orthographic projections of the mounting surfaces F of the two baluns 320 on the reference plane Z are staggered.

[0148] A partial area of ​​the orthographic projection of the feeding element 310 on the reference plane Z is located between the orthographic projections of the two balun grounds 320 on the reference plane Z.

[0149] The orthographic projections of the mounting surfaces F of the two balun grounds 320 on the reference plane Z are staggered, which means that the mounting surfaces F of the two balun grounds 320 are staggered and have no facing parts. Further, after the feeder 310 is mounted on the mounting surfaces F of the two balun grounds 320, a portion of the feeder 310 is located between the two mounting surfaces F.

[0150] At this time, the distance between the two mounting surfaces F may be substantially equal to the thickness of the feeding element 310 , or slightly greater than the thickness of the feeding element 310 .

[0151] Furthermore, the mounting surfaces F of the two balun grounds 320 are parallel to the reference plane Z, the feeding element 310 is constructed as a sheet-like element, and includes a first feeding segment 311, a second feeding segment 312 and a third feeding segment 313 connected in sequence, the first feeding segment 311 and the third feeding segment 313 are respectively connected to the mounting surfaces F of the two balun grounds 320, and the second feeding segment 312 is suspended between the mounting surfaces F of the two balun grounds 320.

[0152] Such a sheet-shaped feeding element 310 is actually sandwiched between the mounting surfaces F of the two balun grounds 320 .

[0153] exist Figure 4 and Figure 5 ,as well as Figure 6 and Figure 7 In the example of FIG. 1 , the sub-radiating arm 200 includes a second supporting arm 221 and a sheet-shaped second extending portion 222 connected to each other. The second supporting arm 221 is connected to the balun ground 320 .

[0154] Each second extension portion 222 is perpendicular to the corresponding balun ground 320 , and all the second extension portions 222 are disposed in the same plane.

[0155] exist Figure 4 In the example, the second extension portion 222 is connected to the side of the second support arm 221 facing the base 40. The second extension portion 222 and the second support arm 221 are arranged along the thickness direction of the corresponding balun ground 320. The second support arm 221 and the corresponding balun ground 320 are arranged coplanarly.

[0156] exist Figure 6 In the example of FIG. 3 , the second support arm 221 and the second extension portion 222 are sequentially arranged along the thickness direction of the corresponding balun ground 320 . The second support arm 221 and the second extension portion 222 are coplanar and both are perpendicular to the corresponding balun ground 320 .

[0157] In the present application, refer to Figure 4 and Figure 6 The second extension portion 222 is constructed as a long strip extending in a direction away from the balun ground 320 .

[0158] The length L1 of the second extension portion 222 is 1 / 4λ, where λ is the wavelength corresponding to the center frequency of the radiation unit 100 .

[0159] Further, in some embodiments, the length L1 of the sub-radiating arm 200 is approximately 7 times the width M of the sub-radiating arm 200. In addition, the height of the balun ground 320 is 1 / 4λ.

[0160] The length of the sub-radiating arm 200 is 7 times the width of the sub-radiating arm 200 , so that the width of the sub-radiating arm 200 is wider, thereby increasing the standing wave bandwidth of the radiation unit 100 .

[0161] In some embodiments, the radiation unit 100 is configured as a dual-polarization radiation unit with mutually orthogonal polarization directions, and the two sub-radiation arms 200 included in the radiation arm 20 extend along the polarization direction of the corresponding radiation arm 20. In addition, the sub-radiation arm 200 and the corresponding balun ground 320 are constructed as an integral bent piece formed by bending the sub-radiation arm 200 relative to the balun ground 320. In this way, the sub-radiation arm 200, the balun ground 320 and the base 40 are formed as an integral bent piece with each other, and in this way, the sub-radiation arm 200, the balun ground 320 and the base 40 can be bent from a pre-processed piece cut from the same metal plate. In addition, the sub-radiation arm 200 and the corresponding balun ground 320 are perpendicular to each other. Each sub-radiation arm 200 and each corresponding balun ground 320 are arranged in a central symmetric manner relative to the center of the radiation surface 10. In addition, the length L1 of the second extension portion 222 is 1 / 4λ, and the height of the balun ground 320 is 1 / 4λ. In this way, the material of the balun ground 320 and the sub-radiation arm 200 can actually be cut out in one piece on a metal plate with an area of ​​about λ / 2×λ / 2. This saves raw materials and reduces manufacturing costs. The balun ground 320, the sub-radiation arm 200 and the base 40 here can be sheet metal parts, which reduces internal cracks and holes and avoids intermodulation problems caused by them.

[0162] In addition, in a specific implementation, the length L1 of the second extension portion 222 (ie, the length of the sub-radiating arm 200 ) may be greater than, less than or equal to the height of the balun 320 , which is more flexible in design.

[0163] Furthermore, the corresponding second extension portion 222 and the second support arm 221 are constructed as an integral bent piece.

[0164] exist Figure 4 In the example, the second support arm 221 and the second extension portion 222 are formed on the surface of the balun 320 other than the mounting surface F, for example, on the side surface adjacent to the mounting surface F, and will not interfere with the insertion operation of the feeder 310. In addition, the second extension portion 222 can also limit the feeder 310.

[0165] exist Figure 6 In the example, the second support arm 221 and the second extension portion 222 are formed on the top end surface of the balun 320 .

[0166] In the embodiment of the present application, when the radiation unit 100 is configured as a dual-polarization radiation unit 100, and the number of the radiation arm 20 and the feed balun 300 are both two, Figure 4 , Figure 6 In the embodiment, each sub-radiating arm 200 and each corresponding balun ground 320 are arranged in a centrally symmetrical manner relative to the center of the radiation surface 10 .

[0167] It can be understood that when the sub-radiating arm 200 and the corresponding balun ground 320 are unfolded in the opposite direction of their own bending direction to be located in the same plane as the base 40 to form an intermediate structure, the intermediate structure is located in a square area of ​​1 / 2λ×1 / 2λ, that is, the sub-radiating arm 200, the balun ground 320 and the base 40 can be bent from a pre-processed piece (intermediate structure) cut from the same metal plate. In this way, the sub-radiating arm 200, the balun ground 320 and the base 40 can be made of very small metal plates, which greatly reduces the manufacturing cost.

[0168] Further, the number of the feeding elements 310 is two, and the two feeding elements 310 are arranged crosswise with each other at an interval in the height direction of the balun 320 .

[0169] In the present application, further, continue to refer to Figure 4 , Figure 6 The base 40 includes a main body 41 and four mounting arms 42 extending outward from the main body 41 , and each balun ground 320 is connected to the mounting arm 42 in a one-to-one correspondence.

[0170] When looking down at the radiation unit 100 from the radiation surface 10 , the balun ground 320 is connected to the right side of the corresponding mounting arm 42 , and the second extension portion 222 is located on the left side of the second support arm 221 .

[0171] Further, refer to Figure 1 , Figure 4 , Figure 6 The base 40 is provided with a through hole 43 , and one end of the feeding element 310 passes through the through hole 43 and extends to a side of the base 40 away from the radiation surface 10 .

[0172] In this way, one end of the feeder 310 can pass through the base 40 through the through hole 43 and be electrically connected to the inner core of the coaxial cable 1020. One end of the feeder 310 and the inner core of the coaxial cable 1020 can be connected by welding. Of course, when the number of the feeders 310 is two, the number of the through holes 43 on the base 40 can be set to two accordingly.

[0173] In addition, Figure 4 , Figure 6 In the embodiment, the through hole 43 may be provided on the mounting arm 42 of the base 40. For example, in the case of a dual-polarized radiation unit 100, two through holes 43 may be provided on two adjacent mounting arms 42, respectively. Figure 1 , Figure 2In the embodiment, the through hole 43 can be set on the main body 41 of the base 40. In the case of a dual-polarized radiation unit 100, the outline size of the through hole 43 can be set to be larger so that both feeders 310 can be inserted into the same through hole 43. It can be understood that when both feeders 310 are inserted into the through hole 43, there is a certain distance between the two feeders 310.

[0174] Of course, a mounting hole 45 may also be provided on the base 40, and a fastener or the like may be passed through the mounting hole 45 and connected to the reflector, so that the radiation unit 100 is fixed on the reflector as a whole. The through holes 43 may be arranged one-to-one on the mounting arms 42 of the base 40.

[0175] A second aspect of the embodiments of the present application further provides an antenna device, including a reflective plate (not shown) and the radiation unit 100 as described above, wherein the base 40 of the radiation unit 100 is disposed on the reflective plate.

[0176] In a specific implementation, the base 40 of the radiation unit 100 is electrically connected to the reflection plate, and one end of the feeding element 310 which is away from the radiation surface 10 passes through the reflection plate and extends to the back side of the reflection plate.

[0177] Furthermore, the antenna device further includes a cable 1020, the inner conductor of the cable 1020 is electrically connected to the feeding element 310 extending to the back side of the reflector. Figure 1 In the radiation unit 100 , the outer conductor of the cable 1020 is electrically connected to the outer conductor 44 of the base 40 .

[0178] Fig. 9 A schematic diagram of a process for manufacturing a radiation unit provided in an embodiment of the present application; Fig.10 A schematic diagram of a pre-processed part formed in the method for manufacturing a radiation unit provided in an embodiment of the present application; Fig.11 A schematic diagram of a pre-processed part of another structure formed in the method for manufacturing a radiation unit provided in an embodiment of the present application; Fig.12 for Fig.11 A schematic diagram of the three-dimensional structure of a pre-processed part; Fig.13 For Fig.12 A schematic diagram of a pre-processed part being processed to a first state; Fig.14 For Fig.13 A schematic diagram of a pre-processed part being processed to a second state; Fig.15 A schematic diagram of a pre-processed part of another structure formed in the method for manufacturing a radiation unit provided in an embodiment of the present application.

[0179] Reference Figure 9-Figure 15The embodiment of the present application further provides a method for manufacturing a radiation unit, which is used to manufacture the radiation unit 100 as described above. The method for manufacturing the radiation unit 100 includes:

[0180] S10, cutting the flat metal plate to form a pre-processed part, wherein the pre-processed part includes a central part, at least two balun parts extending outward from the central part, and radiation parts connected to the balun parts in a one-to-one correspondence.

[0181] S20, bending at least a portion of each radiating portion relative to the corresponding balun portion, and making at least a portion of the radiating portion coplanar.

[0182] S30, bend each balun portion vertically relative to the center portion toward the same side of the center portion.

[0183] In the embodiment of the present application, the metal plate may be a flat metal plate, and the pre-processed part 50 is formed by cutting and other processes. Here, the dual-polarized radiation unit 100 is taken as an example for description. The case where the radiation unit 100 is single-polarized is similar to this, and will not be repeated here.

[0184] 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 welding points. Also, because of the inherent hardness of the metal, it can support the balun ground 320 and the radiation surface 10, which saves the number of components, simplifies assembly and welding, and improves the efficiency of the radiation unit 100. At the same time, because only partial electroplating of the outer guide 44 is required, the cost is also reduced.

[0185] In addition, the radiation unit 100 can be connected to the reflection plate through the base 40, so that the connection between the radiation unit 100 and the reflection plate becomes relatively simple.

[0186] In the embodiment of the present application, the radiation portion 53 may be bent first, and then the balun portion 52 may be bent, or the balun portion 52 may be bent first, and then the radiation portion 53 may be bent. The present application does not limit this.

[0187] In the present application, refer to Fig.11 and Fig.15 A first cutting notch 54 is formed at the connection position between each balun portion 52 and the central portion 51 .

[0188] In step S30, in which each balun portion 52 is vertically bent relative to the central portion 51 toward the same side of the central portion 51:

[0189] At the position of the cut end of each balun portion 52 corresponding to the first cutting notch 54 , the balun portion 52 is bent.

[0190] Furthermore, the radiation part 53 is configured as a long strip, and is connected to a side of the corresponding balun part 52 away from the first cutting notch 54. A second cutting notch 55 is formed at the connection position between each balun part 52 and the corresponding radiation part 53.

[0191] Step S20, in the step of bending at least a portion of each radiating portion 53 relative to the corresponding balun portion 52:

[0192] You can Fig.11 As shown, the partial structure of each radiating portion 53 corresponding to the second cutting notch 55 is bent relative to the corresponding balun portion 52 , and the bending operation performed on the radiating portion 53 and the bending operation performed on the balun portion 52 have the same bending direction.

[0193] or in Fig.15 In the example, each radiating portion 53 is bent relative to the corresponding balun portion 52 , and the bending operation performed on the radiating portion 53 is opposite to the bending operation performed on the balun portion 52 .

[0194] Continue to refer to Fig.10 The radiation portion 53 includes two first support arm preforms 531 and two first extension portion preforms 532 .

[0195] One end of the two first support arm preforms 531 is connected to the end of the balun portion 52 away from the central portion 51, and the two first support arm preforms 531 are located on the width direction side of the corresponding balun portion 52, and the two first extension portion preforms 532 are connected one by one to the side of the two first support arm preforms 531 facing the central portion 51.

[0196] Step S20, the step of bending at least a portion of each radiating portion 53 relative to the corresponding balun portion 52 includes:

[0197] The first extension preform 532 is moved toward the first side (eg, Fig.10 The two first support arm preforms 531 are bent vertically (inward direction perpendicular to the paper plane), and the two first support arm preforms 531 are bent toward the first side at the same angle relative to the corresponding balun portion 52, so that the two first extension portion preforms 532 are coplanar, and the edges of the two first extension portion preforms 532 that are away from the corresponding first support arm preform 531 have a spacing.

[0198] Combination Fig.10 and Figure 1 The first extension part preform 532 forms the first extension part 212 , and the first support arm preform 531 forms the first support arm 211 .

[0199] Further, in step S30, in the step of vertically bending each balun portion 52 relative to the central portion 51 toward the same side of the central portion 51:

[0200] The bending of the balun portion 52 is performed toward the second side, the first side and the second side being opposite sides of the planar metal sheet.

[0201] Furthermore, the central portion 51 includes a main body 41 and four mounting arms 42 extending outward from the main body 41 .

[0202] The manufacturing method of the radiation unit 100 further includes bending one of the mounting arms 42 vertically toward the first side relative to the main body 41 , so that the bent mounting arm 42 forms an outer guide 44 .

[0203] Combine the following Figure 1 and Fig.10 Detailed description Figure 1 A method for manufacturing a radiation unit according to an embodiment.

[0204] The method includes:

[0205] Step 1: Move the first extension preform 532 toward the first side (eg, Fig.10 The two first support arm preforms 531 are bent perpendicularly (inward direction perpendicular to the paper plane), and the two first support arm preforms 531 are bent toward the first side at the same angle relative to the corresponding balun portion 52, so that the two first extension portion preforms 532 are coplanar, and the edges of the two first extension portion preforms 532 that are away from the corresponding first support arm preform 531 are spaced apart. At this time, the first extension portion preform 532 forms the first extension portion 212, and the first support arm preform 531 forms the first support arm 211.

[0206] Step 2: Bend the balun portion 52 relative to the central portion 51 toward the second side, where the first side and the second side are opposite sides of the planar metal plate.

[0207] Step 3: bend one of the mounting arms 42 vertically toward the first side relative to the main body 41 , so that the bent mounting arm 42 forms an outer guide 44 .

[0208] Combine the following Figure 4 and Fig.12 , Fig.13 , Fig.14 Detailed description Figure 4 A method for manufacturing a radiation unit according to an embodiment.

[0209] The method includes:

[0210] Step 1: Reference Fig.12 and Fig.13The portion of each radiating portion 53 corresponding to the second cutting notch 55 is bent upward relative to the corresponding balun portion 52. The bent portion of the radiating portion 53 forms the second extension portion 222, and the unbent portion forms the second support arm 221.

[0211] Step 2: Combine Fig.12 and Fig.13 At the position of the cut end of each balun portion 52 corresponding to the first cutting notch 54 , the balun portion 52 is bent upward. The balun portion 52 forms a balun ground 320 , and the central portion 51 forms a base 40 .

[0212] Combine the following Figure 6 and Fig.15 Detailed description Figure 6 A method for manufacturing a radiation unit according to an embodiment.

[0213] The method includes:

[0214] Step 1: Bend each radiating portion 53 relative to the corresponding balun portion 52 at the position of the second cutting notch 55, with the bending direction along Fig.15 The paper surface is inward. The fold 541 is as shown in FIG. Fig.15 As shown, it is located at the junction of the radiation portion 53 and the balun portion 52 .

[0215] Step 2: At the position of the cutting end of each balun portion 52 corresponding to the first cutting notch 54, Fig.15 The balun portion 52 forms the balun ground 320 , and the center portion 51 forms the base 40 .

[0216] The various performances of the radiation unit of the embodiment of the present application are tested below.

[0217] Fig.16 for Figure 1 The vertical plane radiation pattern of the radiating element is shown. Fig.16 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig.16 In the figure, the horizontal axis is the angle and the vertical axis is the gain. Fig.16 It can be seen that in the radiation unit 100 of the present application, the peak values ​​of the gain at the above three frequency points are about 8.5 dB, which has good radiation performance.

[0218] Fig.17 for Figure 1 The horizontal plane radiation pattern of the radiating element is shown. Fig.17 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig.17In the figure, the horizontal axis is the angle and the vertical axis is the gain. Fig.17 It can be seen that in the radiation unit 100 of the present application, the peak values ​​of the gain at the above three frequency points are about 8.5 dB, which has good radiation performance.

[0219] Fig.18 for Figure 1 The horizontal plane cross-polarization ratio of the radiating element is shown. Fig.18 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig.18 In the figure, the horizontal axis is the angle and the vertical axis is the cross-polarization ratio. Fig.18 It can be seen that in the radiation unit 100 of the present application, the cross-polarization ratio at the 0° position is greater than 15, the polarization purity is better, and therefore it has better radiation performance.

[0220] Fig.19 for Figure 1 The standing wave curve of the radiating element is shown. Fig.19 The standing wave curves of the positive polarization and negative polarization of the radiation unit are shown in FIG. Fig.19 In the figure, the horizontal axis is frequency and the vertical axis is standing wave. Fig.19 It can be seen that in the radiation unit 100 of the present application, the standing wave is about 1.5, and therefore has good radiation performance.

[0221] From this we can see that Figure 1 The radiating element shown can achieve better standing wave and radiation performance.

[0222] Fig. 20 for Figure 6 The vertical plane radiation pattern of the radiating element is shown. Fig. 20 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig. 20 In the figure, the horizontal axis is the angle and the vertical axis is the gain. Fig. 20 It can be seen that in the radiation unit 100 of the present application, the peak values ​​of the gain at the above three frequency points are about 8.5 dB, which has good radiation performance.

[0223] Fig.21 for Figure 6 The horizontal plane radiation pattern of the radiating element is shown. Fig.21 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig.21 In the figure, the horizontal axis is the angle and the vertical axis is the gain. Fig.21 It can be seen that in the radiation unit 100 of the present application, the peak values ​​of the gain at the above three frequency points are about 8.5 dB, which has good radiation performance.

[0224] Fig. 22 for Figure 6 The horizontal plane cross-polarization ratio of the radiating element is shown. Fig. 22 The curves of the radiation unit at the three frequency points of 1710MHz, 1770MHz and 1830MHz are shown in FIG. Fig. 22 In the figure, the horizontal axis is the angle and the vertical axis is the cross-polarization ratio. Fig. 22 It can be seen that in the radiation unit 100 of the present application, the cross-polarization ratio at the 0° position is greater than 15, the polarization purity is better, and therefore it has better radiation performance.

[0225] Fig.23 for Figure 6 The standing wave curve of the radiating element is shown. Fig.23 The standing wave curves of the positive polarization and negative polarization of the radiation unit are shown in FIG. Fig.23 In the figure, the horizontal axis is frequency and the vertical axis is standing wave. Fig.23 It can be seen that in the radiation unit 100 of the present application, the standing wave is within 1.5, and therefore has good radiation performance.

[0226] From this we can see that Figure 6 The radiating element shown can achieve better standing wave and radiation performance.

[0227] 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.

[0228] 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: It includes a radiating surface, a balun and a base, wherein the radiating surface includes at least one radiating arm in a polarization direction, and the balun includes at least one feeding balun; The feeding balun includes a feeding element and two balun grounds spaced apart from each other, the radiating arm includes two sub-radiating arms spaced apart from each other, and the two sub-radiating arms are integrally formed in a one-to-one correspondence with the two balun grounds; The balun ground and the base are constructed as an integral bent piece formed by bending the balun ground relative to the base. The balun ground includes a mounting surface along the front side of the bending direction. The feeding element is arranged on the two mounting surfaces of the two balun grounds and forms a stripline transmission line with the two balun grounds.

2. The radiation unit according to claim 1, characterized in that: defining a virtual reference plane between two corresponding balun grounds; The mounting surfaces of the two corresponding balun grounds are both located on a side of the balun ground facing the reference plane; There is a gap between the ends of two corresponding balun grounds facing away from the base for inserting a feeding member between the mounting surfaces of the two balun grounds.

3. The radiation unit according to claim 2, characterized in that: The orthographic projections of the mounting surfaces of the two baluns on the reference plane have an overlapping area; The orthographic projection of the feeding element on the reference plane is located within the overlapping area.

4. The radiation unit according to claim 3, characterized in that: The feeding component includes a first feeding segment, a second feeding segment and a third feeding segment connected in sequence, the first feeding segment and the third feeding segment are respectively connected to the mounting surfaces of the two balun grounds, and the second feeding segment is suspended between the mounting surfaces of the two balun grounds.

5. The radiation unit according to claim 4, characterized in that: The sub-radiating arm comprises two first supporting arms and two first extending portions in sheet shape; Two first support arms are connected to both side ends of the balun ground in the width direction and extend to a side away from the mounting surface, and the width direction of the balun ground is perpendicular to both the height direction and the thickness direction of the balun ground; The two first extensions are respectively connected to the opposite inner sides of the two first support arms along the width direction, and the two first extensions are spaced apart from the first edges of the corresponding first support arms; The first extension portions of the sub-radiating arms are arranged in the same plane.

6. The radiation unit according to claim 5, characterized in that: The first edges of the two first extensions of the same sub-radiating arm are parallel to each other; an edge of the first extension connected to the corresponding first supporting arm is defined as a second edge; The included angle α between the first edge and the second edge of the first extension portion satisfies: 0°≤α≤45°。 7. The radiation unit according to claim 5, characterized in that: The corresponding first support arm and the first extension portion are constructed as an integral bent piece formed by bending the first extension portion relative to the first support arm.

8. The radiation unit according to claim 3, characterized in that: The radiation unit is configured as a dual-polarization radiation unit; The number of the radiation arms and the number of the feeding baluns are both two; Each of the sub-radiating arms and the corresponding balun grounds are arranged in an axisymmetric and center-symmetrical manner relative to the center of the radiating surface.

9. The radiation unit according to claim 8, characterized in that: The number of the feeding elements is two, and the two feeding elements are cross-arranged with each other at an interval in the height direction of the balun.

10. The radiation unit according to claim 8, characterized in that: The base includes a main body and four mounting arms extending outward from the main body; Each balun ground is connected to the outer contour edge of the main body, and one balun ground is arranged between each two adjacent mounting arms.

11. The radiation unit according to claim 2, characterized in that: The orthographic projections of the mounting surfaces of the two baluns on the reference plane are arranged staggered; A partial area of ​​the orthographic projection of the feeding element on the reference plane is located between the orthographic projections of the two baluns on the reference plane.

12. The radiation unit according to claim 11, characterized in that: The mounting surfaces of the two balun grounds are parallel to the reference plane, the feeding element is constructed as a sheet-like element, and includes a first feeding segment, a second feeding segment and a third feeding segment connected in sequence, the first feeding segment and the third feeding segment are respectively connected to the mounting surfaces of the two balun grounds, and the second feeding segment is suspended between the mounting surfaces of the two balun grounds.

13. The radiation unit according to claim 11, characterized in that: The sub-radiating arm comprises a second supporting arm and a sheet-shaped second extending portion connected to each other; the second supporting arm is connected to the balun ground; Each of the second extension portions is perpendicular to the corresponding balun ground, and all of the second extension portions are coplanarly arranged.

14. The radiation unit according to claim 13, characterized in that: The radiation unit satisfies at least one of the following conditions: 1) The second extension portion is constructed as a long strip extending in a direction away from the balun ground, and the length L1 of the second extension portion is 1 / 4λ, where λ is the wavelength corresponding to the center frequency of the radiation unit; 2) The height H of the balun is 1 / 4λ.

15. The radiation unit according to claim 14, characterized in that: The radiation unit is configured as a dual-polarization radiation unit with mutually orthogonal polarization directions; the number of the radiation arm and the number of the feed balun are both two; the two sub-radiation arms included in the radiation arm extend along the polarization direction corresponding to the radiation arm; The sub-radiating arm and the corresponding balun ground are constructed as an integral bent piece formed by bending the sub-radiating arm relative to the balun ground; and the sub-radiating arm and the corresponding balun ground are perpendicular to each other; Each of the sub-radiating arms and the corresponding balun grounds are arranged in centrosymmetry with respect to the center of the radiating surface.

16. The radiation unit according to any one of claims 1 to 15, characterized in that: The base is provided with a through hole, and one end of the feeding element passes through the through hole and extends to a side of the base away from the radiation surface.

17. The radiation unit according to any one of claims 1 to 15, characterized in that: The radiation unit is configured as a dual-polarization radiation unit with polarization directions orthogonal to each other; the number of the radiation arms and the number of the feed baluns are both two; When the sub-radiating arm and the corresponding balun are unfolded in the opposite direction of their own bending direction to be located in the same plane as the base to form an intermediate structure, the intermediate structure is located in a square area of ​​1 / 2λX 1 / 2λ, wherein λ is the wavelength corresponding to the center frequency of the radiation unit.

18. An antenna device, characterized in that: It comprises a reflecting plate and a radiation unit as claimed in any one of claims 1 to 17, wherein the base of the radiation unit is arranged on the reflecting plate.

19. A method for manufacturing a radiation unit, characterized in that: Used to manufacture a radiation unit according to any one of claims 1 to 17, 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 balun parts extending outward from the central part, and radiation parts connected to the balun parts in a one-to-one correspondence; Bend at least a portion of each of the radiating portions relative to the corresponding balun portion, and make at least a portion of the radiating portions coplanar; The balun portions are bent perpendicularly relative to the central portion toward the same side of the central portion.

20. The method for manufacturing the radiation unit according to claim 19, characterized in that: A first cutting notch is formed at a connection position between each of the balun parts and the central part; In the step of vertically bending each of the balun portions relative to the central portion toward the same side of the central portion: The bending operation is performed on the balun portion at a position of a cutting end of each balun portion corresponding to the first cutting notch.

21. The method for manufacturing the radiation unit according to claim 20, characterized in that: The radiation part is constructed as a long strip, and the radiation part is connected to the side of the corresponding balun part away from the first cutting notch; a second cutting notch is formed at the connection position between each balun part and the corresponding radiation part; In the step of bending at least a portion of each of the radiating portions relative to the corresponding balun portion: Bend the portion of the radiation portion corresponding to the second cutting notch relative to the corresponding balun portion, and the bending operation on the radiation portion and the bending operation on the balun portion are in the same bending direction; or Each of the radiation parts is bent relative to the corresponding balun part, and the bending direction of the radiation part and the bending direction of the balun part are opposite.

22. The method for manufacturing the radiation unit according to claim 19, characterized in that: The radiation portion includes two first support arm preforms and two first extension portion preforms; One end of the two first support arm preforms is connected to the end of the balun portion away from the central portion, and the two first support arm preforms are located on both sides of the width direction of the corresponding balun portion, and the two first extension portion preforms are connected one by one to the side of the two first support arm preforms facing the central portion; The step of bending at least a portion of each of the radiating portions relative to the corresponding balun portion comprises: The first extension part preform is bent vertically toward the first side relative to the corresponding first support arm preform, and the two first support arm preforms are bent toward the first side at the same angle relative to the corresponding balun part, so that the two first extension part preforms are coplanar and there is a spacing between the edges of the two first extension part preforms that are away from the corresponding first support arm preform.

23. The method for manufacturing the radiation unit according to claim 22, characterized in that: In the step of vertically bending each of the balun portions relative to the central portion toward the same side of the central portion: The bending of the balun portion is performed toward a second side, the first side and the second side being opposite sides of the planar metal sheet.

24. The method for manufacturing the radiation unit according to claim 22, characterized in that: The central portion includes a main body and four mounting arms extending outwardly from the main body; The manufacturing method of the radiation unit further includes bending one of the mounting arms vertically toward the first side relative to the main body.

Images