Low-frequency transducer unit and antenna

Abstract

To provide a low frequency oscillator unit and an antenna with good high isolation and decoupling capabilities.SOLUTION: A low frequency oscillator unit and an antenna low frequency oscillator unit have a plurality of oscillator arms 1 extending outward along the mid-axis of the low frequency oscillator unit and spaced from each other, the oscillator arm has a dielectric substrate 11 and a conductive layer 12 provided on the dielectric substrate, the conductive layer includes a plurality of spiral-shaped first conductor sections and a plurality of second conductor sections arranged along the direction of extension of the oscillator arm, adjacent first conductor sections are connected via two spaced second conductor sections, and the two adjacent first conductor sections are symmetrically arranged.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of base station antennas, and in particular to low frequency transducer units and antennas. [Background technology]

[0002] As base station antennas become multi-frequency, smaller, and more complex, how to achieve optimal performance indicators in each sub-frequency band of the same antenna is currently a bottleneck in base station antenna research and development. In this regard, oscillators that can achieve high isolation and have decoupling functions are particularly important. Summary of the Invention [Problem to be solved by the invention]

[0003] It is with this in mind that embodiments of the present invention provide a low frequency transducer unit and antenna with good high isolation and decoupling capabilities. [Means for solving the problem]

[0004] In a first aspect, an embodiment of the present invention is a low-frequency vibrator unit, the low-frequency vibrator unit including a plurality of vibrator arms extending outward along a central axis of the low-frequency vibrator unit and spaced apart from each other, the vibrator arms including a dielectric substrate and a conductive layer provided on the dielectric substrate, the conductive layer including a plurality of spiral-shaped first conductor portions and a plurality of second conductor portions arranged along the extension direction of the vibrator arms, adjacent first conductor portions being connected via two of the second conductor portions spaced apart, and the two adjacent first conductor portions being arranged symmetrically.

[0005] Furthermore, the first conductor portion includes a first branch, a second branch, and a third branch that are fitted outward sequentially and arranged coaxially, the first branch, the second branch, and the third branch each have a first opening, a second opening, and a third opening arranged on the same side, the first end of the first opening and the second end of the second opening are connected via a fourth branch, the first end of the second opening and the second end of the third opening are connected via a fifth branch, and the fourth branch and the fifth branch are arranged at an interval.

[0006] Furthermore, the first conductor portion has a rectangular spiral shape, the first branch has a rectangular structure, the second branch and the third branch have rectangular ring structures, the perimeter of the first branch is 1 / 4 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, the perimeter of the second branch is 1 / 3 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, and the perimeter of the third branch is 1 / 2 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit.

[0007] Furthermore, the first conductor portion has a circular spiral shape, the first branch has a circular structure, the second branch and the third branch have annular structures, the perimeter of the first branch is 1 / 3 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, the perimeter of the second branch is 1 / 2 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, and the perimeter of the third branch is 2 / 3 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit.

[0008] Furthermore, the vibrator arm includes three spiral-shaped first conductor portions, two adjacent first conductor portions on the outside are connected via the two conductor portions to form a closed structure, and the two second conductor portions between the two adjacent first conductor portions on the outside are located on both ends outside the third opening.

[0009] Furthermore, the low-frequency vibrator unit further includes a pull-out piece having pull-out arms equal in number to the vibrator arms, the extension direction of the pull-out arms corresponds to the extension direction of the vibrator arms, the pull-out arms are arranged above the corresponding vibrator arms, and there is a predetermined gap between the pull-out arms and the vibrator arms.

[0010] Furthermore, the low-frequency vibrator unit has four vibrator arms arranged perpendicular to each other, and the vibrator arms are arranged perpendicular to the pull-out piece; The drawer piece has four drawer arms arranged perpendicular to each other, the drawer piece (2) is formed in a cross shape, and the drawer piece has a cross-shaped openwork pattern.

[0011] Furthermore, the low-frequency vibrator unit further includes a feed plate and a balun component; the feeder board is provided with a feeder line and an interface electrically connected to an external coaxial cable; The balun component is connected to the feed plate, and the balun component includes a plurality of baluns, each of which has two vibrator arms fixed to both sides thereof, and each of which is electrically connected to the feed line and the corresponding vibrator arm.

[0012] Furthermore, the low-frequency vibrator unit further includes a pull-out plate that supports the pull-out piece, the pull-out plate having a shape that matches the pull-out piece, a connecting plate extending upward from the top of the balun, and the pull-out plate being fixedly connected to the connecting plate so that there is a predetermined gap between the pull-out piece and the vibrator arm.

[0013] In a second aspect, an embodiment of the present invention is an antenna, said antenna comprising at least two low frequency transducer units according to the first aspect, said low frequency transducer units being arranged in an array. [Effects of the Invention]

[0014] An embodiment of the present invention is a low-frequency vibrator unit and an antenna, the low-frequency vibrator unit including a plurality of vibrator arms extending outward along a central axis of the low-frequency vibrator unit and arranged at intervals from one another, the vibrator arms including a dielectric substrate and a conductive layer provided on the dielectric substrate, the conductive layer including a plurality of spiral-shaped first conductors and a plurality of second conductors arranged along the extension direction of the vibrator arms, adjacent first conductors being connected via two spaced-apart second conductors, and the two adjacent first conductors being arranged symmetrically. As a result, the vibrator arms of the low-frequency vibrator unit can eliminate coupling caused by the low-frequency vibrator unit by the sequentially connected first conductors having a plurality of spiral shapes, thereby eliminating influence between vibrator units of different frequency bands in a multi-frequency antenna. [Brief explanation of the drawings]

[0015] The above and other objects, features and advantages of the present invention will become more apparent from the following description of the preferred embodiments of the present invention taken in conjunction with the drawings. [Figure 1] 1 is a schematic diagram illustrating the configuration of a low-frequency vibrator unit according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating the configuration of a vibrator arm according to an embodiment of the present invention. [Figure 3] 3 is a schematic diagram illustrating the configuration of a drawer piece and a drawer plate according to an embodiment of the present invention. FIG. [Figure 4] 1 is a schematic diagram illustrating the configuration of a balun component according to an embodiment of the present invention. [Figure 5] 1 is a schematic diagram illustrating the configuration of a feeder plate according to an embodiment of the present invention. [Figure 6] 10A and 10B are schematic diagrams illustrating another configuration of a vibrator arm according to an embodiment of the present invention. [Figure 7] FIG. 10 is another schematic diagram of the configuration of the low-frequency vibrator unit according to the embodiment of the present invention. [Figure 8] FIG. 2 is a directional view of a high-frequency vibrator unit of an antenna according to an embodiment of the present invention. [Figure 9] FIG. 2 is a directional view of a low-frequency transducer unit of an antenna according to an embodiment of the present invention. [Figure 10] FIG. 10 is a directional diagram of a single high-frequency transducer unit array. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be described below based on examples, but the present invention is not limited to these examples. In the detailed description of the present invention, certain details will be described in detail. The present invention can be fully understood by those skilled in the art without these details. Well-known methods, processes, flows, elements and circuits will not be described in detail to avoid confusing the essence of the present invention. Additionally, those skilled in the art will appreciate that the drawings provided herein are provided for illustrative purposes and are not necessarily drawn to scale.

[0017] Unless otherwise clearly specified and limited, terms such as "attached," "contacted," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, or an integral connection. They may refer to a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediate medium. Unless otherwise limited, they may refer to an internal connection between two elements or an interactive relationship between two elements. The specific meanings of the above terms used in this application can be understood by those skilled in the art depending on the context.

[0018] Unless the context clearly requires otherwise, throughout the application documents, the words "comprises," "comprises," and similar words shall be construed in an inclusive sense, rather than an exclusive or exclusive sense, i.e., "including but not limited to."

[0019] It should be understood that in describing the present invention, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Furthermore, in describing the present invention, unless otherwise specified, "plurality" means two or more than two.

[0020] 1 and 7 are perspective structural schematic diagrams of a low-frequency vibrator unit according to an embodiment of the present invention. As shown in FIGS. 1 and 7, the low-frequency vibrator unit includes a plurality of vibrator arms 1. The vibrator arms 1 extend outward along the central axis of the low-frequency vibrator unit and are spaced apart from one another, with the extension direction of each vibrator arm 1 constituting a first plane. The vibrator arms 1 are arranged in a circular array around the central axis of the low-frequency vibrator unit, i.e., the central axis, and are spaced apart from one another by a certain angle. Here, the vibrator arms 1 are made of a conductive material.

[0021] In this embodiment, the first plane is a horizontal plane. The plurality of transducer arms 1 of the low-frequency transducer unit are all provided perpendicular to the first plane and formed in a sheet shape perpendicular to the horizontal plane.

[0022] 2 and 6 are schematic diagrams illustrating different configurations of a vibrator arm according to an embodiment of the present invention. As shown in FIGS. 2 and 6, the vibrator arm 1 includes a dielectric substrate 11 and a conductive layer 12 disposed on the dielectric substrate 11. The conductive layer 12 includes a plurality of spiral-shaped first conductors 13 and a plurality of second conductors 14 arranged along the extension direction of the vibrator arm 1. Adjacent first conductors 13 are connected via two spaced-apart second conductors 14, and the two adjacent first conductors 13 are arranged symmetrically. The dielectric substrate 11 can protect the conductive layer 12 and increase capacitive coupling. In an optional embodiment, the conductive layer 12 is a copper layer. This allows the low-frequency vibrator unit to achieve a good decoupling effect thanks to the vibrator arm 1 having multiple spiral shapes.

[0023] In this embodiment, the vibrator arm 1 is heat-resistant grade FR-4, and the material is mainly epoxy resin and glass fiber PCB board.

[0024] 2 and 6 , the first conductor 13 includes a first branch 131, a second branch 132, and a third branch 133 that are coaxially fitted outward. The first branch 131, the second branch 132, and the third branch 133 each have a first opening, a second opening, and a third opening, which are located on the same side. A first end of the first opening and a second end of the second opening are connected via a fourth branch 134, and a first end of the second opening and a second end of the third opening are connected via a fifth branch 135. The fourth branch 134 and the fifth branch 135 are spaced apart from each other. Thus, the first conductor 13 is formed in a spiral shape with an opening at one end, and the first branch 131, the second branch 132, and the third branch 133 are sequentially connected to each other. The spiral shape of the first conductor portion 13 provides the low-frequency vibrator unit with a stealth decoupling effect.

[0025] In this embodiment, the vibrator arm 1 includes three spiral-shaped first conductors 13. The openings of two adjacent outer first conductors 13 are arranged opposite each other and are connected via the two conductors. The two second conductors 14 are connected to the outside of both ends of the third openings of the two adjacent outer first conductors 13, thereby forming a closed structure between the two outer first conductors 13. The openings of two adjacent inner first conductors 13 are arranged back-to-back and are connected via the two conductors. The two second conductors 14 are connected to the back-to-back sides of the openings of the two adjacent inner first conductors 13. The first end of the third opening of the innermost first conductor 13 is a free end. The vibrator arm 1 is electrically connected to a balun component via the first end of the third opening of the innermost first conductor 13 to achieve power supply. Here, the vibrator arm 1 has three spiral-shaped first conductor portions 13 so that the side lengths of the three first conductor portions 13 approach 1 / 4 of the frequency band wavelength of the low-frequency vibrator unit, thereby effectively eliminating coupling caused by the low-frequency vibrator unit.

[0026] 2, in one embodiment, the first conductor portion 13 has a square spiral shape. That is, the first branch 131 has a square structure, and the second branch 132 and the third branch 133 have square ring structures. Here, the perimeter of the first branch 131 is ¼ wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, the perimeter of the second branch 132 is ⅓ wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, and the perimeter of the third branch 133 is ½ wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit. This dimensional design allows the low-frequency vibrator unit to achieve better operating effects.

[0027] 6, in another embodiment, the first conductor portion 13 has a circular spiral shape. That is, the first branch 131 has a circular structure, the second branch 132 and the third branch 133 have annular structures, and the perimeter of the first branch 131 is 1 / 3 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, the perimeter of the second branch 132 is 1 / 2 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit, and the perimeter of the third branch 133 is 2 / 3 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit. This dimensional design allows the low-frequency vibrator unit to achieve a better operating effect.

[0028] Alternatively, the first conductor portion 13 may have other spiral structures that are not limited in this specification.

[0029] As shown in FIGS. 1 and 7, the low-frequency vibrator unit further includes a drawer piece 2. The drawer piece 2 is arranged parallel to a first plane above the multiple vibrator arms 1, with a predetermined distance between the drawer piece 2 and the vibrator arms 1. That is, the multiple vibrator arms 1 are located on the same plane, and the vibrator arms 1 and the drawer piece 2 are respectively arranged on two parallel planes, with a predetermined distance between the two planes so that the drawer piece 2 is positioned higher than the vibrator arms 1. The drawer piece 2 is formed in a sheet shape with an openwork pattern. The drawer piece 2 is made of a conductive metal. In this embodiment, the drawer piece 2 is made of metallic copper. Alternatively, the drawer piece 2 may be made of other materials. The openwork pattern on the drawer piece 2 reduces the influence on the low-frequency vibrator unit and improves the cross-polarization ratio after the unit array, resulting in strong signal spatial directivity and decoupling after the unit array.

[0030] FIG. 3 is a schematic diagram of the configuration of a pull-out piece and a pull-out plate according to an embodiment of the present invention. As shown in FIG. 3, the pull-out piece 2 has pull-out arms 21, the number of which is equal to the number of transducer arms 1, and the extension direction of the pull-out arms 21 corresponds to the extension direction of the transducer arms 1. That is, the pull-out piece 2 has protrusions equal to the number of transducer arms 1, and the pull-out arms 21 extend in the same direction as the transducer arms 1, i.e., are similarly arranged around the central axis of the low-frequency transducer unit, and are formed as pull-out arms 21 at a predetermined angular interval from each other. This design is advantageous for forming a resonant wave between the pull-out piece 2 and the transducer arms 1, creating a filter effect and achieving the purpose of increasing isolation.

[0031] In this embodiment, as shown in FIGS. 1 and 7 , the low-frequency vibrator unit has four vibrator arms 1 arranged perpendicular to each other, all perpendicular to the first plane, i.e., the vibrator arms 1 are arranged perpendicular to the drawer piece 2. That is, the four vibrator arms 1 are spaced 90° apart around the central axis of the low-frequency vibrator unit and are formed like a sheet perpendicular to the horizontal plane. The drawer piece 2 is formed in a cross shape and has four drawer arms 21 arranged perpendicular to each other so as to have a cross-shaped openwork pattern. That is, the drawer piece 2 is formed in a strip shape with a certain width and has a hollow cross-shaped periphery. Alternatively, the vibrator arms 1 and the drawer piece 2 can have other configurations that are not limited herein.

[0032] FIG. 4 is a schematic diagram of a balun component of a low-frequency vibrator unit according to an embodiment of the present invention. FIG. 5 is a schematic diagram of a feed plate of a low-frequency vibrator unit according to an embodiment of the present invention. As shown in FIGS. 4 and 5 , the low-frequency vibrator unit further includes a feed plate 3 and a balun component 4. The feed plate 3 is electrically connected to the vibrator arm 1 via the balun component 4. The balun component 4 is connected to the feed plate 3, and the vibrator arm 1 is connected to the balun component 4. The balun component 4 is electrically connected to the feed plate 3. The vibrator arm 1 is electrically connected to the balun component 4. As shown in FIG. 5 , the feed plate 3 includes a feed line 31 and an interface 32. One end of the feed line 31 is electrically connected to the interface 32 for electrically connecting to an external coaxial cable. The feed plate 3 also has an attachment groove, and the balun component 4 is inserted into and connected to the attachment groove of the feed plate 3. Here, the use of an external coaxial cable for electrical connection can stabilize the structure of the low-frequency vibrator unit, reduce the risk of mismatching, and has certain advantages in mutual adjustment.

[0033] As shown in Fig. 4, the balun component 4 includes a plurality of baluns 41. The vibrator arm 1 is fixed to a position near the top of the balun 41, and the balun 41 is electrically connected to the feed line 31 and the corresponding vibrator arm 1. Here, the balun component 4 is installed perpendicular to the feed plate 3, which is installed parallel to the first plane. The vibrator arm 1 is fixed to overlap the corresponding portion of the balun 41 via a fastener.

[0034] In this embodiment, the balun component 4 includes two cross-connected baluns 41, and two vibrator arms 1 are fixed to both sides of each balun 41. The mounting grooves of the feeder plate 3 are formed in a cross shape to fit the two baluns 41, so that the balun component 4 can be inserted into the feeder plate 3 and fed to the two baluns 41 via the two feeder lines 31. This design allows the feeder plate 3 and the balun component 4 to provide a certain support for the structure of the low-frequency vibrator unit, or the feeder plate 3 and the balun component 4 can have other structures.

[0035] Furthermore, in order to provide a predetermined gap between the drawer piece 2 and the vibrator arm 1, the low-frequency vibrator unit further includes a drawer plate 5 having a shape that matches the drawer piece 2, and the drawer piece 2 is provided on the drawer plate 5, which is arranged to support the drawer piece 2. In other words, since the drawer piece 2 is formed in a sheet shape and is prone to distortion, it is necessary to provide a drawer plate 5 that matches the shape of the drawer piece to create a supporting effect.

[0036] Here, the drawer plate 5 is fixedly connected above the top of the balun component 4. Here, a connecting plate 42 extends upward from the top of the balun 41, and the drawer plate 5 is fixedly connected to the connecting plate 42 so that there is a predetermined gap between the drawer piece 2 and the transducer arm 1. Here, the length of the connecting plate 42 can be set to suit the performance of the low-frequency transducer unit depending on the distance between the transducer arm 1 and the drawer piece 2. The number of connecting plates 42 is the same as the number of drawer arms 21, and they correspond one-to-one. In this embodiment, the drawer plate 5 is formed in a cross shape similar to the shape of the drawer piece 2 and is molded integrally with the drawer piece 2. The drawer plate 5 has through holes for inserting the connecting plate 42 at positions corresponding to the cross-shaped openwork pattern of the drawer piece 2. Alternatively, the drawer piece 5 may have other shapes, and the method of connection to the drawer piece 2 may also be changed. For example, the two may be combined by bonding them together. The material of the lead-out plate 5 may be varied to be other insulating materials.

[0037] This embodiment also provides an antenna including at least two low-frequency oscillator units arranged in an array. The antenna also includes high-frequency oscillator units arranged in an array, with the high-frequency oscillator units arranged directly below the low-frequency oscillator units. The configuration of the low-frequency oscillator units is as described above, and will not be further described here. The antenna may be a MIMO antenna, a laptop computer antenna, a base station antenna, or the like. From the above, it has been found that providing a low-frequency oscillator unit can improve isolation and achieve a favorable decoupling effect.

[0038] FIG. 8 is a directional diagram of a high-frequency vibrator unit of an antenna according to an embodiment of the present invention. FIG. 9 is a directional diagram of a low-frequency vibrator unit of an antenna according to an embodiment of the present invention. As shown in FIG. 8, even after using an array of low-frequency vibrator units and high-frequency vibrator units configured as described above, the directional diagram of the high-frequency vibrator unit is not distorted, the beam converges to 56° to 62°, and the high-frequency directional diagram performance is excellent. As shown in FIG. 9, even after using an array of low-frequency vibrator units and high-frequency vibrator units configured as described above, the low-frequency directional diagram is not affected by high frequencies, the waveform is not distorted, and the beam converges to 68° to 69°. FIG. 10 is a directional diagram of a high-frequency vibrator unit-only array. As shown in FIGS. 8 and 10, the directional diagram of the high-frequency vibrator unit of the antenna is basically consistent with the directional diagram of a high-frequency vibrator unit-only array, thereby achieving the stealth decoupling effect of the low-frequency vibrator unit.

[0039] An embodiment of the present invention is a low-frequency vibrator unit and an antenna, the low-frequency vibrator unit including a plurality of vibrator arms extending outward along a central axis of the low-frequency vibrator unit and arranged at intervals from one another, the vibrator arms including a dielectric substrate and a conductive layer provided on the dielectric substrate, the conductive layer including a plurality of spiral-shaped first conductors and a plurality of second conductors arranged along the extension direction of the vibrator arms, adjacent first conductors being connected via two spaced-apart second conductors, and the two adjacent first conductors being arranged symmetrically. As a result, the vibrator arms of the low-frequency vibrator unit can eliminate coupling caused by the low-frequency vibrator unit by the sequentially connected first conductors having a plurality of spiral shapes, and can eliminate influence between vibrator units of different frequency bands in a multi-frequency antenna.

[0040] The above are only preferred embodiments of the present application and are not intended to limit the present application, and those skilled in the art may have various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. [Explanation of symbols]

[0041] 1 Transducer arm 11 Dielectric substrate 12 Conductive layer 13 First conductor 131 Branch 1 132 Second Branch 133 Third Branch 134 4th Branch 135 5th Branch 14 Second conductor section 2 drawer pieces 21 Drawer arm 3 Power supply board 31 Power supply line 32 Interface 4 Balun Components 41 Balan 42 Connection plate 5 Drawer board

Claims

1. A low-frequency vibrator unit comprising a plurality of vibrator arms (1) extending outward along a central axis of the low-frequency vibrator unit and arranged at intervals from one another, the vibrator arms (1) comprising a dielectric substrate (11) and a conductive layer (12) provided on the dielectric substrate (11), the conductive layer (12) comprising a plurality of spiral-shaped first conductor portions (13) and a plurality of second conductor portions (14) arranged along the extension direction of the vibrator arms (1), adjacent first conductor portions (13) being connected via two of the second conductor portions (14) arranged at an interval, and the two adjacent first conductor portions (13) being arranged symmetrically.

2. The low-frequency vibrator unit of claim 1, characterized in that the first conductor portion (13) includes a first branch (131), a second branch (132), and a third branch (133) that are fitted outward sequentially and arranged coaxially, the first branch (131), the second branch (132), and the third branch (133) each have a first opening, a second opening, and a third opening arranged on the same side, a first end of the first opening and a second end of the second opening are connected via a fourth branch (134), a first end of the second opening and a second end of the third opening are connected via a fifth branch (135), and the fourth branch (134) and the fifth branch (135) are arranged at an interval.

3. The vibrator arm (1) includes three spiral-shaped first conductor portions (13), two adjacent first conductor portions (13) on the outside are connected via two second conductor portions (14) to form a closed structure, and the two second conductor portions (14) between the two adjacent first conductor portions (13) on the outside are located on both ends outside of the third opening.

4. The low-frequency vibrator unit according to claim 1, further comprising a pull-out piece (2) having pull-out arms (21) equal in number to the vibrator arms (1), the extension direction of the pull-out arms (21) corresponding to the extension direction of the vibrator arms (1), the pull-out arms (21) being arranged above the corresponding vibrator arms (1), and a predetermined gap being defined between the pull-out arms (21) and the vibrator arms (1).

5. The low-frequency vibrator unit has four vibrator arms (1) arranged perpendicular to each other, and the vibrator arms (1) are arranged perpendicular to the pull-out piece (2); The low-frequency vibrator unit according to claim 4, characterized in that the pull-out piece (2) has four pull-out arms (21) arranged perpendicular to each other, the pull-out piece (2) is formed in a cross shape, and the pull-out piece (2) has a cross-shaped openwork pattern.

6. The low-frequency vibrator unit further includes a feed plate (3) and a balun component (4); The power supply board (3) is provided with a power supply line (31) and an interface (32) electrically connected to an external coaxial cable, The low-frequency vibrator unit of claim 4, characterized in that the balun component (4) is connected to the power supply plate (3), the balun component (4) includes a plurality of baluns (41), two vibrator arms (1) are fixed to both sides of each of the baluns (41), and each of the baluns (41) is electrically connected to the power supply line (31) and the corresponding vibrator arm (1).

7. The low-frequency vibrator unit according to claim 6, further comprising a pull-out plate (5) that supports the pull-out piece (2), the pull-out plate (5) having a shape that matches the pull-out piece (2), a connecting plate (42) extending upward from the top of the balun (41), and the pull-out plate (5) being fixedly connected to the connecting plate (42) so as to maintain a predetermined gap between the pull-out piece (2) and the vibrator arm (1).

8. An antenna comprising at least two low-frequency vibrator units according to any one of claims 1 to 7, the low-frequency vibrator units being arranged in an array.

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