Antenna unit and communication device based on coupling feeding

Abstract

The present invention relates to an antenna unit and a communication device based on coupled feeding. The antenna unit based on coupled feeding includes a reflector, a feeding network, a short-circuit branch, a radiating unit and a feeding assembly. The radiating unit is arranged on the reflector, and the radiating unit is electrically connected to the reflector through a conductive member, and a short-circuit conductive column is arranged at the bottom of the radiating unit. The short-circuit conductive column is electrically connected to the other end of the short-circuit branch. The feeding assembly is coupled and connected to the radiating unit, and the feeding assembly is electrically connected to the feeding network. The feeding network is electrically connected to one end of the short-circuit branch, and the radiating unit is electrically connected to the other end of the short-circuit branch through the short-circuit conductive column, and the feeding assembly is also electrically connected to the feeding network. In this way, the purpose of DC grounding can be achieved. The antenna unit using the DC grounding method only needs the two ends of the short-circuit branch to be connected to the feeding network and the short-circuit conductive column respectively, without adding additional structural design, which is simple and efficient, and improves the antenna integration and manufacturability.

Description

Technical Field

[0001] The present invention relates to the field of antenna communication technology, and in particular to an antenna unit and a communication device based on coupled feeding. Background Art

[0002] With the continuous expansion of the mobile communication spectrum, the requirements for the working bandwidth of the antenna unit are constantly increasing. The coupled feeding method is widely used because of its good broadband matching characteristics. When the radiating arm and the feeding component of the antenna unit all adopt the coupled feeding method, the DC grounding of the antenna unit needs to be considered. To solve this problem, the following solutions are usually adopted: Solution 1, select some antenna units in the array and replace them with directly welded antenna units; Solution 2, add a DC short-circuit structure to the feeding network (such as a phase shifter). However, since different antenna units are selected in Solution 1, the aperture phase in each antenna unit cannot be strictly the same, which increases the difficulty of the antenna shaping design; Solution 2 increases the difficulty and complexity of the feeding network design due to the addition of a short-circuit structure in the feeding network, while reducing production efficiency and bringing problems such as intermodulation stability. Summary of the invention

[0003] Based on this, it is necessary to overcome the defects of the prior art and provide an antenna unit and communication device based on coupled feeding, which can achieve the purpose of DC grounding, only adds a set of welding points, does not add additional structural design, is simple and efficient, and improves antenna integration and manufacturability and other indicators.

[0004] The technical solution is as follows: an antenna unit based on coupled feeding, the antenna unit based on coupled feeding comprising: a reflector, a feeding network and a short-circuit branch, the metal reflecting surface of the reflector being isolated from the feeding network and the short-circuit branch respectively, the feeding network being electrically connected to one end of the short-circuit branch; a radiating unit, the radiating unit being arranged on the reflector, the radiating unit being electrically connected to the metal reflecting surface of the reflector, a short-circuit conductive column being arranged at the bottom of the radiating unit, the short-circuit conductive column being electrically connected to the other end of the short-circuit branch; a feeding component, the feeding component being coupled and connected to the radiating unit, the feeding component being electrically connected to the feeding network.

[0005] The above-mentioned antenna unit based on coupled feeding, because the radiating unit is electrically connected to the metal reflective surface of the reflector, and the radiating unit is coupled and connected to the feeding assembly, that is, the structure formed by the combination of the reflector, the radiating unit and the feeding assembly is equivalent to an antenna unit in the coupled feeding form. Among them, the feeding network is electrically connected to one end of the short-circuit branch, the radiating unit is electrically connected to the other end of the short-circuit branch through the short-circuit conductive column, and the feeding assembly is also electrically connected to the feeding network, so as to achieve the purpose of DC grounding. The antenna unit using this DC grounding method only needs the two ends of the short-circuit branch to be connected to the feeding network and the short-circuit conductive column respectively, without adding additional structural design, which is simple and efficient, and improves the antenna integration and manufacturability indicators.

[0006] In one of the embodiments, the length of the short-circuit branch is L, the wavelength of the center frequency point of the working frequency band of the antenna unit based on coupled feeding is λ, and L is 1 / 6λ to 1 / 3λ.

[0007] In one embodiment, L is 1 / 4λ.

[0008] In one embodiment, the short-circuit conductive column is connected to the short-circuit branch by welding; and the feeding assembly is connected to the feeding network by welding.

[0009] In one of the embodiments, a metal reflecting surface is provided on a surface of the reflecting plate facing the radiating unit, and the feeding network and the short-circuit branch are provided on a side of the reflecting plate facing away from the radiating unit.

[0010] In one of the embodiments, the reflector is provided with a first through hole corresponding to the short-circuit conductive column, and a second through hole corresponding to the feeding component; the short-circuit conductive column is electrically connected to the short-circuit branch after passing through the first through hole, and the feeding component is electrically connected to the feeding network after passing through the second through hole.

[0011] In one of the embodiments, the antenna unit based on coupled feeding further includes a phase shifter or a power divider arranged on the reflector, and the feeding network is a phase shifting network of the phase shifter or a power dividing network of the power divider.

[0012] In one of the embodiments, the phase shifter or the power divider is arranged on the surface of the reflector facing away from the radiation unit; the plate body of the phase shifter or the power divider is an integrated structure with the plate body of the reflector; the plate body of the reflector is an insulating dielectric plate, and the metal reflective surface is provided on the surface facing the radiation unit.

[0013] In one of the embodiments, the radiating unit includes a vibrator seat and a radiating arm connected to the vibrator seat; the radiating unit is electrically connected to the reflecting plate through a conductive member; a third through hole is provided on the vibrator seat, the conductive member passes through the third through hole to fix the vibrator seat to the reflecting plate, and the vibrator seat is electrically connected to the reflecting plate through the conductive member.

[0014] A communication device comprises the antenna unit based on coupling feeding.

[0015] In the above-mentioned communication device, since the radiation unit is electrically connected to the metal reflection surface of the reflection plate, and the radiation unit is coupled to the feeding assembly, that is, the structure formed by the combination of the reflection plate, the radiation unit and the feeding assembly is equivalent to an antenna unit in the coupled feeding form. Among them, the feeding network is electrically connected to one end of the short-circuit branch, the radiation unit is electrically connected to the other end of the short-circuit branch through the short-circuit conductive column, and the feeding assembly is also electrically connected to the feeding network, so as to achieve the purpose of DC grounding. The antenna unit using this DC grounding method only needs the two ends of the short-circuit branch to be connected to the feeding network and the short-circuit conductive column respectively, without adding additional structural design, which is simple and efficient, and improves the antenna integration and manufacturability indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic structural diagram of an antenna unit based on coupling feeding according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A one-view structural diagram of the reflector and the phase shifter after the housing is hidden;

[0020] Figure 3 for Figure 2 Another perspective structural diagram of the structure shown;

[0021] Figure 4 for Figure 2 Another perspective structural diagram of the structure shown;

[0022] Figure 5 for Figure 1 A one-view structural diagram after the reflector and phase shifter are hidden;

[0023] Figure 6 for Figure 5 Another perspective structural diagram of the structure shown;

[0024] Figure 7 for Figure 6 Schematic diagram of the decomposition structure;

[0025] Figure 8 for Figure 7 A one-way structural diagram after the feeding components are hidden.

[0026] 10. Reflector; 11. First through hole; 12. Second through hole; 20. Feed network; 30. Short-circuit branch; 40. Radiating unit; 41. Short-circuit conductive column; 42. Diode seat; 421. Third through hole; 422. Connecting part; 423. Balun; 4231. Groove; 43. Radiating arm; 431. Radiating plate; 50. Feed assembly; 51. Feeding element; 511. First vertical section; 512. Horizontal section; 513. Second vertical section; 60. Phase shifter; 61. Insulating substrate. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figures 1 to 4 , Figure 1 FIG. 4 shows a schematic structural diagram of an antenna unit based on coupled feeding according to an embodiment of the present invention. Figures 2 to 4 They are shown respectively Figure 1The three structural diagrams of different viewing angles after the shell of the reflector 10 and the phase shifter 60 are hidden. An antenna unit based on coupled feeding is provided in one embodiment of the present invention, and the antenna unit based on coupled feeding includes: a reflector 10, a feeding network 20, a short-circuit branch 30, a radiation unit 40 and a feeding assembly 50. The metal reflection surface (not shown in the figure) of the reflector 10 is isolated from the feeding network 20 and the short-circuit branch 30 respectively. The feeding network 20 is electrically connected to one end of the short-circuit branch 30. The radiation unit 40 is arranged on the reflector 10, and the radiation unit 40 is electrically connected to the metal reflection surface of the reflector 10 through, for example, a conductive member, and a short-circuit conductive column 41 is provided at the bottom of the radiation unit 40. The short-circuit conductive column 41 is electrically connected to the other end of the short-circuit branch 30. The feeding assembly 50 is coupled to the radiation unit 40, and the feeding assembly 50 is electrically connected to the feeding network 20.

[0029] It should be noted that the metal reflective surface of the reflector 10 is isolated from the feed network 20 and the short-circuit branch 30, which means that the metal reflective surface of the reflector 10 has no direct electrical contact with the feed network 20 and the short-circuit branch 30, but is in a separated state.

[0030] The above-mentioned antenna unit based on coupled feeding, because the radiation unit 40 is electrically connected to the metal reflection surface of the reflection plate 10 through, for example, a conductive member, and the radiation unit 40 is coupled and connected to the feeding assembly 50, that is, the structure formed by the combination of the reflection plate 10, the radiation unit 40 and the feeding assembly 50 is equivalent to an antenna unit in the coupled feeding form. Among them, the feeding network 20 is electrically connected to one end of the short-circuit branch 30, the radiation unit 40 is electrically connected to the other end of the short-circuit branch 30 through the short-circuit conductive column 41, and the feeding assembly 50 is also electrically connected to the feeding network 20, so as to achieve the purpose of DC grounding. The antenna unit using this DC grounding method only needs the two ends of the short-circuit branch 30 to be connected to the feeding network 20 and the short-circuit conductive column 41 respectively, without adding additional structural design, which is simple and efficient, and improves the antenna integration and manufacturability indicators.

[0031] In one embodiment, the length of the short-circuit branch 30 is L, the wavelength of the center frequency of the working frequency band of the antenna unit based on the coupled feed is λ, and L is 1 / 6λ to 1 / 3λ. Specifically, L is 1 / 4λ. In this way, the purpose of DC grounding can be achieved. It should be noted that the shape of the short-circuit branch 30 is not limited here, for example, it can be a straight line, a broken line, an arc shape, etc. The length of the short-circuit branch 30 refers to the moving path along one end of the short-circuit branch 30 to the other end of the short-circuit branch 30.

[0032] See also Figures 2 to 4In one embodiment, the short-circuit conductive column 41 is welded to the short-circuit branch 30. In this way, the short-circuit conductive column 41 and the short-circuit branch 30 can be fixed together, and good conductivity of both can be ensured. Optionally, the short-circuit conductive column 41 and the short-circuit branch 30 can also be connected by bonding, for example, using conductive glue, or by clamping, riveting, screwing, bolting, etc., which are not limited here and can be set according to actual needs.

[0033] See also Figures 2 to 4 In one embodiment, the feed assembly 50 is connected to the feed network 20 by welding. In this way, the feed assembly 50 and the feed network 20 can be fixed together, and good conductivity of both can be ensured. Similarly, the feed assembly 50 and the feed network 20 can also be connected by bonding, for example, using a conductive adhesive, or by, for example, a snap connection, a riveted connection, a screw connection, a bolt connection, etc., which are not limited here and can be set according to actual needs.

[0034] In one embodiment, a metal reflective surface is provided on the surface of the reflector 10 facing the radiation unit 40, and the metal reflective surface is specifically, for example, a metal layer, and the feed network 20 and the short-circuit branch 30 are provided on the side of the reflector 10 facing away from the radiation unit 40. In this way, the feed network 20 and the short-circuit branch 30 are located on the side of the reflector 10 facing away from the radiation unit 40, and will not be directly electrically contacted and conducted with the metal layer of the reflector 10. Specifically, the feed network 20 and the short-circuit branch 30 can be provided on the surface of the reflector 10 facing away from the radiation unit 40, or, for example, on an insulating substrate 61, and the insulating substrate 61 is provided on the side of the reflector 10 facing away from the radiation unit 40. More specifically, when the antenna unit based on coupled feeding is provided with a phase shifter 60 or a power divider, the insulating substrate 61 is specifically provided inside the phase shifter 60 or the power divider.

[0035] See also Figures 2 to 4In one embodiment, the reflector 10 is provided with a first through hole 11 corresponding to the short-circuit conductive column 41, and a second through hole 12 corresponding to the feeding assembly 50. The short-circuit conductive column 41 is electrically connected to the short-circuit branch 30 after passing through the first through hole 11, and the feeding assembly 50 is electrically connected to the feeding network 20 after passing through the second through hole 12. In order to prevent the short-circuit conductive column 41 from being electrically connected to the reflector 10 during the process of passing through the first through hole 11, an insulating layer is provided on the inner wall of the first through hole 11, or an insulating layer is provided on the outer wall of the short-circuit conductive column 41, or the aperture size of the first through hole 11 is made larger than the outer diameter of the short-circuit conductive column 41, and the short-circuit conductive column 41 is prevented from contacting the hole wall of the first through hole 11. Similarly, in order to prevent the bottom end of the feeding component 50 from being electrically connected to the reflecting plate 10 during the process of passing through the second through hole 12, an insulating layer is provided on the inner wall of the second through hole 12, or an insulating layer is provided on the outer wall of the bottom end of the feeding component 50, or the aperture of the second through hole 12 is made larger than the outer diameter of the bottom end of the feeding component 50, and the bottom end of the feeding component 50 is prevented from contacting the hole wall of the second through hole 12.

[0036] Please refer to Figures 1 to 3 In one embodiment, the antenna unit based on coupling feeding includes but is not limited to a phase shifter 60 or a power divider disposed on the reflector 10. The feeding network 20 is specifically, for example, a phase shifting network of the phase shifter 60 or a power dividing network of the power divider.

[0037] See also Figure 1 In one embodiment, the phase shifter 60 or the power divider is disposed on the surface of the reflector 10 away from the radiation unit 40. The plate body of the phase shifter 60 or the power divider is an integrated structure with the plate body of the reflector 10. The plate body of the reflector 10 is an insulating dielectric plate, and a metal reflective surface is provided on the surface facing the radiation unit 40.

[0038] As an optional solution, the phase shifter 60 or the power divider can also be arranged on the surface of the reflector 10 facing the radiation unit 40. When the phase shifter 60 or the power divider is arranged on the surface of the reflector 10 facing the radiation unit 40, there is no need to arrange the first through hole 11 and the second through hole 12 on the reflector 10.

[0039] As an optional solution, the plate body of the phase shifter 60 or the power divider can also be connected to the plate body of the reflector 10 by bonding or fasteners. The fasteners include but are not limited to screws, pins, bolts, rivets, and clips.

[0040] As an optional solution, the reflective plate 10 may also be made of a metal plate.

[0041] See also Figures 4 to 6 , Figure 5 Shows Figure 1 A perspective structural diagram after the reflector 10 and the phase shifter 60 are hidden, Figure 6 Shows Figure 5 Another perspective structural diagram of the structure shown. In one embodiment, the radiation unit 40 includes a vibrator seat 42 and a radiation arm 43 connected to the vibrator seat 42. The vibrator seat 42 is provided with a third through hole 421, and the conductive member passes through the third through hole 421 to fix the vibrator seat 42 on the reflector 10, and the vibrator seat 42 is electrically connected to the reflector 10 through the conductive member. Specifically, the conductive member includes but is not limited to metal screws, metal bolts, metal screws, metal pins, metal rivets, and metal clips.

[0042] It should be noted that the coupling connection between the feeding component 50 and the radiation unit 40 means that the feeding component 50 and the radiation unit 40 are not in electrical contact, but are spaced apart so that energy is transferred between the feeding component 50 and the radiation unit 40 by mutual coupling to achieve signal transmission.

[0043] See also Figure 7 and Figure 8 , Figure 7 Shows Figure 6 Schematic diagram of the decomposition structure, Figure 8 Shows Figure 7 A perspective structural diagram after the feeding assembly 50 in is hidden. Further, the radiating arm 43 includes two dipoles arranged orthogonally. Each dipole includes two radiating plates 431, that is, one of the dipoles corresponds to one pair of two radiating plates 431 arranged diagonally, and the other dipole corresponds to the other pair of two radiating plates 431 arranged diagonally. The vibrator seat 42 includes a connecting portion 422 and four baluns 423. The bottom ends of the four baluns 423 are connected to the connecting portion 422, and the top ends of the four baluns 423 are respectively connected to the four radiating plates 431 in a one-to-one correspondence. The feeding assembly 50 includes two feeding elements 51 arranged orthogonally. The two feeding elements 51 are respectively coupled and connected to the two dipoles in a one-to-one correspondence. In this way, the radiating unit 40 is a dual-polarization radiating unit 40, and accordingly, there are two short-circuit conductive columns 41, and the two short-circuit conductive columns 41 are both connected to the connecting portion 422. There are two short-circuit branches 30, two feeding networks 20, two short-circuit conductive pillars 41 are connected to the two short-circuit branches 30 in a one-to-one correspondence, and two short-circuit branches 30 are connected to the two feeding networks 20 in a one-to-one correspondence. When the radiation unit 40 is a single-polarization radiation unit 40, the short-circuit conductive pillar 41, the short-circuit branch 30 and the feeding network 20 are all one, and the short-circuit conductive pillar 41 is connected to the feeding network 20 through the short-circuit branch 30.

[0044] Specifically, the feeding element 51 is, for example, a feeding sheet or a feeding rod.

[0045] See also Figure 7 and Figure 8Furthermore, the feeding element 51 includes a first vertical section 511 , and the first vertical section 511 is disposed on the periphery of the vibrator seat 42 .

[0046] See also Figure 7 and Figure 8 In some embodiments, the feeder 51 further includes a transverse section 512. One end of the transverse section 512 is connected to the first vertical section 511. A groove 4231 is provided on the top of the two baluns 423 of one of the dipoles, and the transverse section 512 corresponding to the feeding of the dipole is provided in the groove 4231, and an insulating spacer (not shown in the figure) is provided between the transverse section 512 and the inner wall of the groove 4231. Similarly, the tops of the two baluns 423 of the other dipole are also provided with a groove 4231 corresponding to the transverse section 512 of the other feeder 51. In this way, the transverse section 512 is provided in the groove 4231, and is spaced apart from the corresponding dipole to achieve coupling connection with the corresponding dipole, and is responsible for the transmission of the corresponding polarization direction signal. In addition, the transverse section 512 is connected to the inner wall of the groove 4231, for example, through an insulating spacer, so that the first feeder 51 can be stably provided on the vibrator seat 42.

[0047] It should be noted that the insulating isolation member is made of insulating materials such as plastic, ceramic, rubber, etc., mainly to avoid electrical connection between the first transverse section 512 of the feeder 51 and the top of the balun 423 , and to fix the feeder 51 .

[0048] See also Figure 7 and Figure 8 In some embodiments, the feeder 51 further includes a second vertical section 513. The second vertical section 513 is connected to the other end of the first horizontal section 512, and the second vertical section 513 is arranged at the periphery of the vibrator seat 42, specifically, it is arranged at intervals from the balun 423. In this way, it is not like the traditional technology that the second vertical sections 513 are arranged in the internal wiring grooves of the balun 423, so there is no need to set a closed balun 423 structure as in the traditional technology, but it can be set as an open balun 423 structure, thereby reducing the structural size of the vibrator seat 42 to a certain extent, that is, it can realize the miniaturization of the vibrator seat 42, and at the same time can reduce the high-frequency parasitic radiation of the balun 423, and effectively improve the gain of the high-frequency radiation unit 40.

[0049] Of course, the feeding element 51 in this embodiment can also be set in the internal wiring groove of the balun 423, as long as it is in a coupled feeding relationship with the radiation unit 40. The specific setting form and specific shape of the feeding element 51 are not limited and can be set according to actual needs.

[0050] See also Figure 7 and Figure 8In some embodiments, the radiation plate 431 is a frame, which is specifically a closed frame, or a notch is provided at a portion of the frame away from the balun 423. It should be noted that the frame specifically refers to a hollow area provided in the middle area of ​​the radiation plate 431 to form a frame.

[0051] Please refer to Figures 1 to 3 In one embodiment, a communication device includes the antenna unit based on coupling feeding according to any one of the above embodiments.

[0052] In the above communication device, since the radiation unit 40 is electrically connected to the reflector 10 through a conductive member, and the radiation unit 40 is coupled to the feed assembly 50, that is, the structure formed by the reflector 10, the radiation unit 40 and the feed assembly 50 is equivalent to an antenna unit in a coupled feeding form. Among them, the feed network 20 is electrically connected to one end of the short-circuit branch 30, the radiation unit 40 is electrically connected to the other end of the short-circuit branch 30 through the short-circuit conductive column 41, and the feed assembly 50 is also electrically connected to the feed network 20, so as to achieve the purpose of DC grounding. The antenna unit using this DC grounding method only needs the two ends of the short-circuit branch 30 to be connected to the feed network 20 and the short-circuit conductive column 41 respectively, without adding additional structural design, which is simple and efficient, and improves the antenna integration and manufacturability indicators.

[0053] It should be noted that the "short-circuit conductive column 41" can be "a part of the radiation unit 40", that is, the "short-circuit conductive column 41" is integrally formed with the "other parts of the radiation unit 40"; it can also be an independent component that can be separated from the "other parts of the radiation unit 40", that is, the "short-circuit conductive column 41" can be manufactured independently and then combined with the "other parts of the radiation unit 40" into a whole. Figure 5 or Figure 6 As shown, in one embodiment, the “short-circuit conductive column 41 ” is a part of the “radiation unit 40 ” that is integrally formed.

[0054] It should be noted that the "radiating arm 43" can be "a part of the vibrator base 42", that is, the "radiating arm 43" and "the other parts of the vibrator base 42" are integrally formed and manufactured; or it can be an independent component that can be separated from the "other parts of the vibrator base 42", that is, the "radiating arm 43" can be manufactured independently and then combined with the "other parts of the vibrator base 42" into a whole. Figure 5 or Figure 6 As shown, in one embodiment, the "radiating arm 43" is a part of the "vibrator seat 42" that is integrally formed.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above 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 those of ordinary skill in the art, 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

Claims

1. An antenna unit based on coupled feeding, characterized in that: The antenna unit based on coupling feeding includes: A reflector, a feed network and a short-circuit branch, wherein the metal reflective surface of the reflector is isolated from the feed network and the short-circuit branch respectively, and the feed network is electrically connected to one end of the short-circuit branch; A radiation unit, wherein the radiation unit is disposed on the reflection plate, the radiation unit is electrically connected to the metal reflection surface of the reflection plate, a short-circuit conductive column is disposed at the bottom of the radiation unit, and the short-circuit conductive column is electrically connected to the other end of the short-circuit branch; A feeding component, wherein the feeding component is coupled to the radiating unit and is electrically connected to the feeding network.

2. The antenna unit based on coupling feeding according to claim 1, characterized in that: The length of the short-circuit branch is L, the wavelength of the center frequency point of the working frequency band of the antenna unit based on coupling feeding is λ, and L is 1 / 6λ to 1 / 3λ.

3. The antenna unit based on coupling feeding according to claim 2, characterized in that: L is 1 / 4λ.

4. The antenna unit based on coupling feeding according to claim 1, characterized in that: The short-circuit conductive column is connected to the short-circuit branch by welding; and the feeding component is connected to the feeding network by welding.

5. The antenna unit based on coupling feeding according to claim 1, characterized in that: A metal reflecting surface is provided on the surface of the reflecting plate facing the radiating unit, and the feeding network and the short-circuit branch are arranged on a side of the reflecting plate facing away from the radiating unit.

6. The antenna unit based on coupling feeding according to claim 5, characterized in that: The reflector is provided with a first through hole corresponding to the short-circuit conductive column and a second through hole corresponding to the feeding component; the short-circuit conductive column is electrically connected to the short-circuit branch after passing through the first through hole, and the feeding component is electrically connected to the feeding network after passing through the second through hole.

7. The antenna unit based on coupling feeding according to claim 1, characterized in that: The antenna unit based on coupled feeding also includes a phase shifter or a power divider arranged on the reflector, and the feeding network is a phase shifting network of the phase shifter or a power dividing network of the power divider.

8. The antenna unit based on coupling feeding according to claim 7, characterized in that: The phase shifter or the power divider is arranged on the surface of the reflector away from the radiation unit; the plate body of the phase shifter or the power divider is an integrated structure with the plate body of the reflector; the plate body of the reflector is an insulating dielectric plate, and the metal reflective surface is provided on the surface facing the radiation unit.

9. The antenna unit based on coupling feeding according to any one of claims 1 to 8, characterized in that: The radiation unit includes a vibrator seat and a radiation arm connected to the vibrator seat; the radiation unit is electrically connected to the reflection plate through a conductive member; a third through hole is provided on the vibrator seat, the conductive member passes through the third through hole to fix the vibrator seat on the reflection plate, and the vibrator seat is electrically connected to the reflection plate through the conductive member.

10. A communication device, characterized in that: The communication device comprises the antenna unit based on coupling feeding according to any one of claims 1 to 9.

Images