Low frequency oscillator 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, the bottleneck in current base station antenna research and development is how to achieve optimal performance indicators in each sub-frequency band of the same antenna. In this regard, oscillators that can achieve high isolation by themselves and have decoupling functions are particularly important. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE DISCLOSURE In view of this, embodiments of the present invention provide a low frequency transducer unit and antenna having 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 comprising a plurality of vibrator arms extending outward along a central axis of the low-frequency vibrator unit and spaced apart 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 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 which are successively fitted outward and coaxially arranged, 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, a first end of the first opening and a second end of the second opening are connected via a fourth branch, a first end of the second opening and a second end of the third opening are connected via a fifth branch, and the fourth branch and the fifth branch are arranged at a distance from each other.

[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 central 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 central 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 central 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 central 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 central 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 central frequency point of the operating frequency band of the high frequency vibrator unit.

[0008] Further, 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 to the number of 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] Further, the low-frequency transducer unit has four transducer arms arranged perpendicular to each other, and the transducer arms are arranged perpendicular to the pull-out piece; The pull-out piece has four pull-out arms arranged perpendicular to each other, the pull-out piece (2) is formed in a cross shape, and the pull-out piece has a cross-shaped openwork pattern.

[0011] Furthermore, the low frequency transducer unit further includes a feed plate and a balun component; the feed plate is provided with a feed 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 transducer arms fixed to both sides thereof, and each of the baluns is electrically connected to the feed line and the corresponding transducer 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, and a connecting plate extending upward from the top of the balun, and the pull-out plate is 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. Effect of the Invention

[0014] An embodiment of the present invention is a low-frequency transducer unit and an antenna, the low-frequency transducer unit includes a plurality of transducer arms extending outward along a central axis of the low-frequency transducer unit and spaced apart from one another, the transducer arms include a dielectric substrate and a conductive layer provided on the dielectric substrate, the conductive layer includes a plurality of spiral-shaped first conductors and a plurality of second conductors arranged along the extension direction of the transducer arms, adjacent first conductors are connected via two spaced apart second conductors, and the two adjacent first conductors are arranged symmetrically. This allows the transducer arms of the low-frequency transducer unit to eliminate coupling caused by the low-frequency transducer unit by the first conductors having a plurality of spiral shapes connected in sequence, and to eliminate the influence between transducer units of different frequency bands in the multi-frequency antenna. [Brief description of the drawings]

[0015] The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings. [Figure 1] FIG. 2 is a schematic diagram showing the configuration of a low-frequency transducer unit according to an embodiment of the present invention. [Diagram 2] 1 is a schematic diagram illustrating the configuration of a vibrator arm according to an embodiment of the present invention. [Diagram 3] 3 is a schematic diagram of a configuration of a pull-out piece and a pull-out plate according to an embodiment of the present invention. FIG. [Figure 4] FIG. 2 is a schematic diagram illustrating a configuration of a balun component according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic diagram showing the configuration of a feed plate according to an embodiment of the present invention. [Figure 6] 11 is a schematic diagram showing another configuration of a vibrator arm according to an embodiment of the present invention. FIG. [Figure 7] FIG. 11 is a schematic diagram showing another configuration of a low-frequency transducer unit according to an embodiment of the present invention. [Figure 8] FIG. 2 is a directional view of a high-frequency transducer 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. 13 is a directional diagram of a single high-frequency transducer unit array. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 the description of these details. In order to avoid confusing the essence of the present invention, well-known methods, processes, flows, elements and circuits will not be described in detail. Additionally, those skilled in the art will appreciate that the figures provided herein are provided for illustrative purposes and are not necessarily drawn to scale.

[0017] Unless otherwise clearly specified and limited, the terms "attached", "contacted", "connected", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or integral. It may be a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or, unless otherwise limited, an internal connection between two elements or an interactive relationship between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art depending on the situation.

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

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

[0020] 1 and 7 are perspective schematic diagrams of a low-frequency transducer unit according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 7, the low-frequency transducer unit includes a plurality of transducer arms 1. The plurality of transducer arms 1 extend outwardly along the central axis of the low-frequency transducer unit, are spaced apart from one another, and the extension direction of each transducer arm 1 forms a first plane. The plurality of transducer arms 1 are arranged in a circular array around the central axis of the low-frequency transducer unit, i.e., the central axis, and are spaced apart from one another by a certain angle. Here, the material of the transducer arms 1 is 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 of different configurations of a vibrator arm according to an embodiment of the present invention. As shown in FIG. 2 and FIG. 6, the vibrator arm 1 includes a dielectric substrate 11 and a conductive layer 12 provided on the dielectric substrate 11. The conductive layer 12 includes a plurality of spiral-shaped first conductor parts 13 and a plurality of second conductor parts 14 arranged along the extension direction of the vibrator arm 1, and adjacent first conductor parts 13 are connected via two of the second conductor parts 14 arranged at an interval, and the two adjacent first conductor parts 13 are arranged symmetrically. The dielectric substrate 11 can protect the conductive layer 12 and increase the capacitive coupling. In addition, as an optional embodiment, the conductive layer 12 is a copper layer. As a result, the low-frequency vibrator unit can obtain a good decoupling effect by the vibrator arm 1 having a plurality of spiral shapes.

[0023] In this embodiment, the transducer 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 which are coaxially fitted outwardly. Here, the first branch 131, the second branch 132, and the third branch 133 have a first opening, a second opening, and a third opening, respectively, and the first opening, the second opening, and the third opening are provided 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 provided at an interval, so that the first conductor 13 is formed in a spiral shape having 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 a stealth decoupling effect to the low-frequency transducer unit.

[0025] In this embodiment, the transducer arm 1 includes three first conductors 13 in a spiral shape, and the openings of the two first conductors 13 adjacent to each other on the outside are provided 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 first conductors 13 adjacent to each other on the outside, so that the two outer first conductors 13 form a closed structure. The openings of the two first conductors 13 adjacent to each other on the inside are provided back-to-back, and are connected via the two conductors. The two second conductors 14 are connected to the sides of the two first conductors 13 adjacent to each other on the inside that face back to back. The first end of the third opening of the innermost first conductor 13 is a free end. The transducer arm 1 is electrically connected to a balun component via the first end of the third opening of the innermost first conductor 13 to realize power supply. Here, the vibrator arm 1 has three spiral-shaped first conductor parts 13 so that the side lengths of the three first conductor parts 13 approach 1 / 4 of the frequency band wavelength of the low-frequency vibrator unit, thereby effectively eliminating coupling due to the low-frequency vibrator unit.

[0026] As shown in Fig. 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 a square ring structure. Here, the circumference of the first branch 131 is 1 / 4 wavelength of the center frequency point of the operating frequency band of the high frequency vibrator unit, the circumference of the second branch 132 is 1 / 3 wavelength of the center frequency point of the operating frequency band of the high frequency vibrator unit, and the circumference of the third branch 133 is 1 / 2 wavelength of the center frequency point of the operating frequency band of the high frequency vibrator unit. With this dimension design, the low frequency vibrator unit can achieve a better operating effect.

[0027] As shown in Fig. 6, in another embodiment, the first conductor portion 13 is a circular spiral shape. That is, the first branch 131 is a circular structure, the second branch 132 and the third branch 133 are annular structures, the circumference 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 circumference 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 circumference 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. With this dimension design, the low frequency vibrator unit can 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] Further, as shown in FIG. 1 and FIG. 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, and there is a predetermined interval between the drawer piece 2 and the vibrator arm 1. That is, the multiple vibrator arms 1 are located on the same plane, the vibrator arms 1 and the drawer piece 2 are respectively provided on two planes parallel to each other, and there is a certain interval between the two planes so that the position of the drawer piece 2 is higher than the vibrator arm 1. The drawer piece 2 is formed in a sheet shape having an openwork pattern. The material of the drawer piece 2 is a conductive metal. In this embodiment, the material of the drawer piece 2 is metallic copper. Alternatively, the drawer piece 2 may be other materials. In addition, by providing the drawer piece 2 with an openwork pattern, the influence on the low-frequency vibrator unit can be reduced, the cross polarization ratio after the unit array can be improved, and the signal spatial directivity after the unit array is strong and the decoupling property is strong.

[0030] 3 is a schematic diagram of the configuration of the pull-out piece and the pull-out plate according to the embodiment of the present invention. As shown in FIG. 3, the pull-out piece 2 has pull-out arms 21, the number of the pull-out arms 21 is equal to the number of the 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 the transducer arms 1, and is formed as the pull-out arms 21 in the same extension direction as the transducer arms 1, that is, similarly arranged around the central axis of the low-frequency transducer unit, and has a predetermined interval angle with each other. This design is advantageous to form a resonant wave between the pull-out piece 2 and the transducer arms 1, form a filter effect, and achieve the purpose of increasing isolation.

[0031] In this embodiment, as shown in FIG. 1 and FIG. 7, the low-frequency vibrator unit has four vibrator arms 1 arranged perpendicular to each other, all of which are arranged perpendicular to the first plane, i.e., the vibrator arms 1 are arranged perpendicular to the pull-out piece 2. That is, the four vibrator arms 1 are arranged around the center axis of the low-frequency vibrator unit at an interval of 90° and are formed in a sheet shape perpendicular to the horizontal plane. The pull-out piece 2 has four pull-out arms 21 arranged perpendicular to each other so as to be formed in a cross shape and have a cross-shaped openwork pattern. That is, the pull-out piece 2 is formed in a strip shape having a certain width and is formed in a hollow cross shape around the periphery. Alternatively, the vibrator arms 1 and the pull-out piece 2 can have other configurations that are not limited in this specification.

[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 FIG. 4 and FIG. 5, the low-frequency vibrator unit further includes a feed plate 3 and a balun component 4, and 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 and the feed plate 3 are electrically connected. The vibrator arm 1 is electrically connected to the balun component 4. As a result, the vibrator arm 1 is electrically connected to the feed plate 3 via the balun component 4. As shown in FIG. 5, the feed plate 3 includes a feed line 31 and an interface 32. Here, 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 is also provided with 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 transducer unit, reduce the risk of matching discontinuity, and has certain advantages in mutual adjustment.

[0033] As shown in Fig. 4, the balun component 4 includes a plurality of balons 41. The transducer 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 transducer arm 1. Here, the balun component 4 is installed perpendicular to the feed plate 3, and the feed plate 3 is installed parallel to the first plane. The transducer 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 on both sides of each balun 41. The mounting groove of the feed plate 3 is formed in a cross shape to fit the two baluns 41, so that the balun component 4 can be inserted into the feed plate 3 and the two baluns 41 can be fed respectively through the two feed lines 31. With this design, the feed plate 3 and the balun component 4 can exert a certain supporting effect on the structure of the low-frequency vibrator unit, or the feed plate 3 and the balun component 4 can have other structures.

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

[0036] Here, the draw-out plate 5 is fixedly connected to the top of the balun component 4. Here, a connecting plate 42 is provided on the top of the balun 41, extending upward, and the draw-out plate 5 is fixedly connected to the connecting plate 42 so that there is a predetermined gap between the draw-out 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 according to the distance between the transducer arm 1 and the draw-out piece 2. The number of connecting plates 42 is the same as the number of the draw-out arms 21, and they correspond one-to-one. In this embodiment, the draw-out plate 5 is formed in a cross shape similar to that of the draw-out piece 2, and is molded integrally with the draw-out piece 2. The draw-out plate 5 is provided with a through hole for inserting the connecting plate 42 at a position corresponding to the openwork pattern of the cross shape of the draw-out piece 2. Alternatively, the draw-out piece 5 may have another shape, and the method of connection with the draw-out piece 2 may also be changed, for example, the two may be bonded together. The material of the extraction plate 5 may be varied to be other insulating materials.

[0037] In addition, this embodiment provides an antenna including at least two low-frequency transducer units arranged in an array. The antenna includes high-frequency transducer units arranged in an array, and the high-frequency transducer units are arranged directly below the low-frequency transducer units. The configuration of the low-frequency transducer units is as described above, and will not be described further here. The antenna may be a MIMO antenna, a notebook computer antenna, a base station antenna, or the like. From the above, it was found that the isolation can be increased by providing a low-frequency transducer unit, and a good decoupling effect can be obtained.

[0038] FIG. 8 is a directional diagram of the high frequency transducer unit of the antenna according to the embodiment of the present invention. FIG. 9 is a directional diagram of the low frequency transducer unit of the antenna according to the embodiment of the present invention. As shown in FIG. 8, even after using the array of the low frequency transducer unit and the high frequency transducer unit of the above configuration, the directional diagram of the high frequency transducer unit is not distorted, the beam converges to 56°-62°, and the high frequency directional diagram performance is excellent. As shown in FIG. 9, even after using the array of the low frequency transducer unit and the high frequency transducer unit of the above configuration, the low frequency directional diagram is not affected by the high frequency, the waveform is not distorted, and the beam converges to 68°-69°. FIG. 10 is a directional diagram of the high frequency transducer unit single array. As shown in FIG. 8 and FIG. 10, the directional diagram of the high frequency transducer unit of the antenna is basically consistent with the directional diagram of the high frequency transducer unit single array, and the stealth decoupling effect of the low frequency transducer unit can be achieved.

[0039] An embodiment of the present invention is a low-frequency transducer unit and an antenna, the low-frequency transducer unit includes a plurality of transducer arms extending outward along a central axis of the low-frequency transducer unit and spaced apart from one another, the transducer arms include a dielectric substrate and a conductive layer provided on the dielectric substrate, the conductive layer includes a plurality of spiral-shaped first conductors and a plurality of second conductors arranged along the extension direction of the transducer arms, adjacent first conductors are connected via two spaced apart second conductors, and the two adjacent first conductors are symmetrically arranged. This allows the transducer arms of the low-frequency transducer unit to eliminate coupling caused by the low-frequency transducer unit by the first conductors having a plurality of spiral shapes connected in sequence, and to eliminate the influence between transducer units of different frequency bands in the multi-frequency antenna.

[0040] The above are only preferred embodiments of the present application, and are not used to limit the present application, and those skilled in the art may have various amendments and modifications to the present application. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should 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 First Branch 132 Second Branch 133 3rd 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 spaced apart from one another, the vibrator arms (1) including a dielectric substrate (11) and a conductive layer (12) provided on the dielectric substrate (11), the conductive layer (12) including 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 arm (1), adjacent first conductor portions (13) being connected via two of the second conductor portions (14) arranged at a distance, and the two adjacent first conductor portions (13) being arranged symmetrically.

2. The low-frequency vibrator unit according to claim 1, characterized in that the first conductor portion (13) includes a first branch (131), a second branch (132), and a third branch (133) which are fitted outwardly in sequence 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 a distance from each other.

3. The low-frequency vibrator unit of claim 2, characterized in that the first conductor portion (13) has a square spiral shape, the first branch (131) has a square structure, the second branch (132) and the third branch (133) have square ring structures, the perimeter of the first branch (131) 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 (132) 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 (133) is 1 / 2 wavelength of the center frequency point of the operating frequency band of the high-frequency vibrator unit.

4. The low-frequency vibrator unit of claim 2, characterized in that the first conductor portion (13) has a circular spiral shape, the first branch (131) has a circular structure, the second branch (132) and the third branch (133) have annular structures, the circumference 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 circumference 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 circumference 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.

5. The low-frequency vibrator unit described in claim 2, characterized in that the vibrator arm (1) includes three spiral-shaped first conductor portions (13), two adjacent first conductor portions (13) on the outside are connected via the two conductor portions 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 the third opening.

6. 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 number of 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 distance being provided between the pull-out arms (21) and the vibrator arms (1).

7. The low-frequency transducer unit has four transducer arms (1) arranged perpendicular to each other, and the transducer arms (1) are arranged perpendicular to the pull-out piece (2); The low-frequency vibrator unit according to claim 6, 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.

8. The low-frequency transducer unit further includes a feed plate (3) and a balun component (4); The feeder plate (3) is provided with a feeder line (31) and an interface (32) electrically connected to an external coaxial cable, The low-frequency vibrator unit described in claim 2, 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).

9. The low-frequency vibrator unit according to claim 8, further comprising a pull-out plate (5) supporting the pull-out piece (2), the pull-out plate (5) having a shape matching the pull-out piece (2), a connecting plate (42) extending upward from the top of the balun (41), and the pull-out plate (5) fixedly connected to the connecting plate (42) so as to have a predetermined gap between the pull-out piece (2) and the vibrator arm (1).

10. An antenna comprising at least two low-frequency transducer units according to any one of claims 1 to 9, the low-frequency transducer units being arranged in an array.

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