Metal plate vibrator

Abstract

The utility model discloses a metal plate oscillator, which comprises four oscillator arms arranged around the center of the metal plate oscillator, and each oscillator arm comprises a main oscillator arm provided with a first hollow part; the auxiliary oscillator arm is bent and extends from one end, far away from the center, of the main oscillator arm, and the auxiliary oscillator arm is provided with a second hollow part; the balun is arranged at one end, close to the center, of the main oscillator arm, and at least part of the balun is parallel to the auxiliary oscillator arm; wherein the baluns of the two adjacent oscillator arms are at least partially overlapped up and down. The metal plate oscillator realizes miniaturization, light weight and no guide sheet arrangement, and has excellent electrical performance and radiation performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a sheet metal vibrator. BACKGROUND

[0002] Massive MIMO (super large scale multiple input multiple output) technology is one of the key technologies of 4G / 5G, and through using a large number of array antennas on the base station transceiver, greater wireless data flow and connection reliability are realized. Compared with the previous single / dual polarization antenna and 4 / 8 channel antenna, the large-scale antenna technology can improve the utilization efficiency of spectrum and energy through different dimensions. The 3D shaping and channel estimation technology can adaptively adjust the phase and power of each antenna vibrator, significantly improve the beam pointing accuracy of the system, concentrate the signal strength in a specific pointing area and a specific user group, enhance the user signal while significantly reducing the intra-cell self-interference and adjacent interference, and is an excellent technology to improve the user signal to interference ratio.

[0003] The sheet metal vibrator is a commonly used antenna vibrator form in the current 4G Massive MIMO antenna, which has high design flexibility and is suitable for space-limited equipment. In the prior art, most of the sheet metal vibrators are provided with a director sheet, and the installation operation is relatively complex. The overall weight of the vibrator is relatively heavy, and the performance optimization may require a complex debugging process, including impedance matching and adjustment of the radiation mode.

[0004] Therefore, it is necessary to provide a new sheet metal vibrator to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a miniaturized sheet metal vibrator without a director sheet, which has excellent electrical performance and radiation performance.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A sheet metal vibrator includes four vibrator arms arranged around the center of the sheet metal vibrator, each of the vibrator arms includes:

[0008] A main vibrator arm is provided with a first hollow part;

[0009] A sub-vibrator arm is bent and extended from one end of the main vibrator arm away from the center, and the sub-vibrator arm is provided with a second hollow part;

[0010] A balun is arranged at one end of the main vibrator arm close to the center, and the balun is at least partially parallel to the sub-vibrator arm;

[0011] The baluns of two adjacent vibrator arms are at least partially arranged in an up-down overlapping manner.

[0012] As a further improved technical scheme of the utility model, the balun of one of the vibrator arms comprises a first extension section and a first vertical section connected in sequence from one end of the main vibrator arm close to the center, and the first extension section is arranged in parallel with the main vibrator arm.

[0013] The balun of another of the vibrator arms adjacent thereto comprises a bending section, a second extension section and a second vertical section connected in sequence from one end of the main vibrator arm close to the center, the second extension section is lower than the plane where the main vibrator arm is located, and the first extension section is arranged in parallel with and at least partially overlaps the second extension section.

[0014] As a further improved technical scheme of the utility model, the auxiliary vibrator arm is perpendicular to the main vibrator arm.

[0015] As a further improved technical scheme of the utility model, the first extension section is lower than the plane where the main vibrator arm is located.

[0016] As a further improved technical scheme of the utility model, the two baluns of any two of the vibrator arms arranged opposite to each other are at least partially parallel.

[0017] As a further improved technical scheme of the utility model, the center passes through the part where the first extension section and the second extension section overlap, the first vertical section is located between the balun arranged opposite thereto and the center, and the second vertical section is located between the balun arranged opposite thereto and the center.

[0018] As a further improved technical scheme of the utility model, the maximum length of the main vibrator arm is one fourth of the wavelength, and the circumference of the second hollow part is one fourth of the wavelength.

[0019] As a further improved technical scheme of the utility model, the first hollow part is a closed loop circular hole, and the second hollow part is a closed loop rectangular hole.

[0020] As a further improved technical scheme of the utility model, the main vibrator arm is hexagonal, any two opposite edges thereof are parallel to each other, and the auxiliary vibrator arm is rectangular.

[0021] As a further improved technical scheme of the utility model, the height of the balun is greater than the height of the auxiliary vibrator arm.

[0022] Compared with the prior art, the metal plate vibrator has the beneficial effects that: the vibrator arm comprises a main vibrator arm, a secondary vibrator arm and a balun, the main vibrator arm is provided with a first hollow part, the secondary vibrator arm is provided with a second hollow part, the frequency band is expanded and the standing wave is matched, the weight of the metal plate vibrator can be significantly reduced, and two adjacent baluns are arranged in an upper and lower overlapping mode to meet the requirement of impedance matching. The metal plate vibrator is small in size, light in weight and free of a directing sheet, and has excellent electrical performance and radiation performance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a three-dimensional structure schematic diagram of the metal plate vibrator of an embodiment of the utility model;

[0024] Figure 2 It is a three-dimensional structure schematic diagram of the metal plate vibrator of an embodiment of the utility model from another perspective;

[0025] Figure 3 It is a top view structure schematic diagram of the metal plate vibrator of an embodiment of the utility model;

[0026] Figure 4 It is a front view structure schematic diagram of the metal plate vibrator of an embodiment of the utility model;

[0027] Figure 5 It is a structure schematic diagram of two vibrator arms of the metal plate vibrator of an embodiment of the utility model;

[0028] Figure 6 It is an electrical performance test simulation diagram of the metal plate vibrator of an embodiment of the utility model;

[0029] Figure 7 It is an electrical performance test simulation diagram of the metal plate vibrator of an embodiment of the utility model;

[0030] Figure 8 It is a radiation performance test simulation diagram of the metal plate vibrator of an embodiment of the utility model;

[0031] Figure 9 It is a radiation performance test simulation diagram of the metal plate vibrator of an embodiment of the utility model. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. If there are several embodiments, the features in these embodiments can be combined with each other when there is no conflict. When the description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise specified. The description in the following exemplary embodiments does not represent all the embodiments consistent with the present application; on the contrary, they are only examples of devices, products and / or methods consistent with some aspects of the present application as recited in the claims of the present application.

[0033] The terms used in the present application are only for the purpose of describing the embodiments and are not intended to limit the scope of protection of the present application. The singular forms "a", "an" and "the" used in the specification and claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should be understood that the terms "first", "second" and similar words used in the specification and claims of the present application do not represent any order, number or importance, but are only used to distinguish the names of the features. Similarly, "one" or "an" and similar words do not represent a quantity limitation, but represent the existence of at least one. Unless otherwise indicated, the terms "front", "back", "up", "down" and the like appearing in the present application are only for the purpose of illustration and are not limited to a particular position or a spatial orientation. The terms "include" or "contain" and the like are open-ended expressions, which means that the elements appearing before "include" or "contain" cover the elements appearing after "include" or "contain" and their equivalents, which does not exclude that the elements appearing before "include" or "contain" can also include other elements.

[0035] If "several" appears in the present application, it means two or more.

[0036] Please refer to Figures 1 to 9 As shown in the drawings, the metal plate vibrator of the embodiment discloses a metal plate vibrator, which comprises four vibrator arms 10 arranged around the center of the metal plate vibrator, each vibrator arm 10 comprising a main vibrator arm 11, a secondary vibrator arm 12 and a balun 13, wherein the main vibrator arm 11 is arranged horizontally, and the secondary vibrator arm 12 and the balun 13 are arranged vertically.

[0037] The metal plate vibrator of the embodiment is a 4G metal plate vibrator of 1.7GHz-2.7GHz, which is used for 4G Massive MIMO antenna. Taking the working frequency of 2GHz as an example, the working wavelength of the metal plate vibrator is the wavelength corresponding to the frequency of the wireless signal emitted or received by the metal plate vibrator.

[0038] Please refer toFigures 1 to 3 As shown, the four vibrator arms 10 are evenly distributed around the center, and thus the four vibrator arms 10 are arranged opposite to each other in pairs.

[0039] As shown, Figures 1 to 3 As shown, the maximum length of the main vibrator arm 11 is 1 / 4λ, where λ is the wavelength of 2GHz. The main vibrator arm 11 is provided with a first hollow part 111 for passing through the conductor. In this embodiment, the first hollow part 111 is a closed loop circular hole. In other embodiments, the first hollow part 111 can also be a closed loop square hole or other shapes, as long as the circumference of the first hollow part 111 is set to 40mm±2mm.

[0040] As shown, Figures 1 to 4 As shown, the sub-vibrator arm 12 is bent and extended from the end of the main vibrator arm 11 away from the center. Further, the main vibrator arm 11 and the sub-vibrator arm 12 are approximately L-shaped. The sub-vibrator arm 12 is provided with a second hollow part 121. Further, the second hollow part 121 is a closed loop rectangular hole, and its circumference is 1 / 4λ, which can expand the frequency band and match the standing wave, so that the sheet metal vibrator of this embodiment does not need to be provided with a director sheet to expand the frequency band, which is beneficial to simplify the structure of the sheet metal vibrator and realize miniaturization, while reducing material costs and assembly time, effectively simplifying the installation operation process, and having more application advantages in antennas. In other embodiments, the second hollow part 121 can also be provided in other shapes, as long as the circumference of the second hollow part 121 is set to 1 / 4λ.

[0041] In this embodiment, the sub-vibrator arm 12 is perpendicular to the main vibrator arm 11.

[0042] As shown, Figures 1 to 5 As shown, the balun 13 is arranged at the end of the main vibrator arm 11 close to the center, and the balun 13 is at least partially parallel to the sub-vibrator arm 12. The balun 13 is matched in impedance by air microstrip. In order to meet the requirements of impedance matching, the two polarized baluns 13 are at least partially arranged in an overlapping manner, and the two baluns 13 are arranged on two adjacent vibrator arms 10.

[0043] The four vibrator arms 10 form a feeding mode, in which the lower ends of the two overlapping baluns 13 are feeding points 140, and the lower ends of the other two baluns 13 are ground points 150, so that the signals fed from the two feeding points are superimposed on each other to form two vector superimposed signals, which can produce two mutually orthogonal polarizations, and can form a dual-polarized antenna when applied to an antenna.

[0044] As shown, Figures 1 to 5As shown, one of the baluns 13 of the main oscillator arm 10 includes a first extension segment 131 and a first vertical segment 132 connected sequentially to the center end of the main oscillator arm 11. The first extension segment 131 extends generally horizontally, and the first vertical segment 132 extends generally vertically. The balun 13 of the adjacent oscillator arm 10 includes a bent segment 133, a second extension segment 134, and a second vertical segment 135 connected sequentially to the center end of the main oscillator arm 11. The second extension segment 134 extends generally horizontally, and the second vertical segment 135 extends generally vertically. The second extension segment 134 is lower than the plane of the main oscillator arm 11. The first extension segment 131 and the second extension segment 134 are parallel and at least partially overlap vertically. Further, the first extension segment 131 is parallel to the main oscillator arm 11.

[0045] Please see Figure 4 and Figure 5 As shown, in this embodiment, the first extension segment 131 and the main vibrating arm 11 are located on the same plane, that is, the first extension segment 131 extends horizontally from the end of the main vibrating arm 11 near the center.

[0046] In other embodiments, the first extension segment 131 and the main vibrator arm 11 are lower than the plane of the main vibrator arm 11. The first extension segment 131 and the main vibrator arm 11 can be connected by bending to give the vibrator arm 10 a high overall structural strength. The second extension segment 134 is lower than the plane of the first extension segment 131, and its center passes through the overlapping part of the first extension segment 131 and the second extension segment 134 to give the sheet metal vibrator a high overall stability.

[0047] Please see Figures 1 to 3 As shown, the first vertical segment 132 is located between the balun 13 facing it and the center, and the second vertical segment 135 is located between the balun 13 facing it and the center. That is, the two polarized baluns 13 extend horizontally to be closer to the other two baluns 13 facing them, thereby reducing the distance between the feed point and the grounding point. Moreover, because of the horizontal extension, the two baluns 13 can better achieve vertical overlap.

[0048] Please see Figure 1 , Figure 3 and Figure 5 As shown, the main vibrating arm 11 is hexagonal, with any two opposite sides being parallel to each other. The secondary vibrating arm 12 is connected to the side furthest from the center among these six sides, and the balun 13 is connected to the side closest to the center among these six sides, with the side furthest from the center and the side closest to the center being parallel to each other. The secondary vibrating arm 12 is rectangular. When the second hollow portion 121 is a closed-loop rectangular hole, the four rectangular sides of the second hollow portion 121 correspond to the four rectangular sides of the secondary vibrating arm 12.

[0049] As shown in Figure 4 The height of the balun 13 is greater than the height of the sub-vibrator arm 12. The embodiment converts and matches the balanced electrical signal relative to the reference ground and the unbalanced electrical signal relative to the reference ground through the feeding of the balun 13, so as to improve the matching between the sheet metal vibrator and the feeding network, and improve the signal transmission quality of the sheet metal vibrator. In actual application, the height of the balun 13 and the sub-vibrator arm 12 can be reasonably adjusted according to actual needs.

[0050] The sheet metal vibrator of the embodiment can be miniaturized to about 41mm, which is only two-thirds of the size of the 1.7GHz-2.7GHz vibrator on the market, and has excellent electrical performance and radiation performance. Each vibrator arm 10 is formed by sheet metal bending, and has high strength.

[0051] In order to more clearly illustrate the beneficial technical effects of excellent electrical performance and radiation performance, the embodiment of the application also provides a data simulation diagram.

[0052] As shown in Figure 6 and Figure 7 , the horizontal axis represents the working frequency, and the vertical axis represents the return loss. Figure 6 In the figure, the horizontal axis represents the working frequency, and the vertical axis represents the isolation. Figure 7 In the figure, the horizontal axis represents the working frequency, and the vertical axis represents the isolation. The return loss of the sheet metal vibrator of the embodiment is less than -16dB, and the isolation is less than -26dB, reaching an excellent level in the industry.

[0053] As shown in Figure 8 and Figure 9 , the 3dB beam width of the sheet metal vibrator of the embodiment converges to 60-68°, the axial cross-polarization ratio reaches -18dB, the ±60° cross-polarization ratio reaches -8dB, and the gain is 9.3dB, all reaching an excellent level in the industry.

[0054] In summary, compared with the prior art, the sheet metal vibrator of the utility model has the following advantages: the vibrator arm 10 includes the main vibrator arm 11, the sub-vibrator arm 12 and the balun 13, the main vibrator arm 11 is provided with the first hollow part 111, and the sub-vibrator arm 12 is provided with the second hollow part 121, which is used for expanding the frequency band and matching the standing wave, and can significantly reduce the weight of the sheet metal vibrator, and the two adjacent baluns 13 are arranged in an overlapping manner, so as to meet the requirement of impedance matching. The sheet metal vibrator realizes miniaturization, light weight and no directing sheet setting, and has excellent electrical performance and radiation performance.

[0055] The above embodiments are only used for illustrating the technical scheme described in the utility model and not for limiting the technical scheme described in the utility model, and the understanding of the specification should be based on the technical personnel in the art, although the utility model has been described in detail in the specification with reference to the above embodiments, however, the ordinary technical personnel in the art should understand that the technical personnel in the art can still modify or equivalently replace the utility model, and all the technical schemes and improvements which do not deviate from the spirit and scope of the utility model should be covered in the claim scope of the utility model.

Claims

1. A sheet metal vibrator, characterized by The four vibrator arms (10) are arranged around the center of the sheet metal vibrator, each of the vibrator arms (10) comprises: a main vibrator arm (11) provided with a first hollow part (111); a secondary vibrator arm (12) bent and extended from one end of the main vibrator arm (11) away from the center, the secondary vibrator arm (12) is provided with a second hollow part (121); a balun (13) arranged at one end of the main vibrator arm (11) close to the center, the balun (13) is at least partially parallel to the secondary vibrator arm (12); wherein the baluns (13) of two adjacent vibrator arms (10) are at least partially arranged in an upper and lower overlapping manner.

2. The sheet metal vibrator of claim 1, wherein: The balun (13) of one of the vibrator arms (10) comprises a first extension section (131) and a first vertical section (132) connected in sequence from one end of the main vibrator arm (11) close to the center, the first extension section (131) is arranged in parallel with the main vibrator arm (11); The balun (13) of the adjacent other vibrator arm (10) comprises a bending section (133), a second extension section (134) and a second vertical section (135) connected in sequence from one end of the main vibrator arm (11) close to the center, the second extension section (134) is lower than the plane where the main vibrator arm (11) is located, the first extension section (131) and the second extension section (134) are arranged in parallel and at least partially overlap in an upper and lower manner.

3. The sheet metal vibrator of claim 1, wherein: The secondary vibrator arm (12) is perpendicular to the main vibrator arm (11).

4. The sheet metal vibrator of claim 2, wherein: The first extension section (131) is lower than the plane where the main vibrator arm (11) is located.

5. The machined mass transducer of claim 2, wherein: The two baluns (13) of any two oppositely arranged vibrator arms (10) are at least partially parallel.

6. The machined mass transducer of claim 2, wherein: The center passes through the overlapping part of the first extension section (131) and the second extension section (134), the first vertical section (132) is located between the balun (13) oppositely arranged thereto and the center, and the second vertical section (135) is located between the balun (13) oppositely arranged thereto and the center.

7. The machined mass transducer of claim 1, wherein: The maximum length of the main vibrator arm (11) is one quarter of the wavelength, and the circumference of the second hollow part (121) is one quarter of the wavelength.

8. The machined mass transducer of claim 1, wherein: The first hollow part (111) is a closed loop circular hole, and the second hollow part (121) is a closed loop rectangular hole.

9. The machined mass transducer of claim 1, wherein: The main vibrator arm (11) is hexagonal, wherein any two opposite edges are parallel to each other, and the secondary vibrator arm (12) is rectangular.

10. The machined mass transducer of claim 1, wherein: The height of the balun (13) is greater than the height of the secondary vibrator arm (12).

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