Sheet metal vibrator

Abstract

Provide a sheet metal oscillator that achieves miniaturization, weight reduction, and installation without a guide sheet, and has excellent electrical characteristics and radiation characteristics. 【Solution means】 The sheet metal oscillator of the present invention includes four oscillator arms 10 arranged around the center of the sheet metal oscillator. Each oscillator arm includes a main oscillator arm 11 provided with a first cutout portion 111, and a sub-oscillator arm 12 that extends by bending from one end away from the center of the main oscillator arm. The sub-oscillator arm is a sub-oscillator arm provided with a second cutout portion 121, and a balun 13 disposed at one end close to the center of the main oscillator arm and at least partially parallel to the sub-oscillator arm. The baluns of two adjacent oscillator arms are arranged at least partially overlapping vertically.

Description

Technical Field

[0001] The present invention relates to the technical field of communication, and particularly to a sheet metal vibrator.

Background Art

[0002] Massive MIMO (Massive Multiple-Input Multiple-Output) technology, which is one of the key technologies of 4G / 5G, realizes larger wireless data traffic and connection reliability by using a large number of array antennas in a base station transceiver. Compared with conventional single / dual-polarization antennas and 4 / 8-channel antennas, large-scale antenna technology can improve the utilization efficiency of spectrum and energy through different dimensions. 3D forming and channel prediction technologies can adaptively adjust the phase and power of each antenna vibrator, significantly improving the beam pointing accuracy of the system, concentrating the signal strength on specific pointing areas and specific user groups, enhancing user signals while significantly reducing self-interference and adjacent area interference within the cell, and improving the carrier-to-interference ratio of user signals. It is an excellent technology.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The sheet metal vibrator is a form of antenna vibrator commonly used in current 4G Massive MIMO antennas, with high design flexibility and suitability for devices with limited space. In the prior art, most sheet metal vibrators are equipped with a guide sheet, the installation operation is complex, the overall weight of the vibrator is heavy, and at the same time, complex debugging processes such as impedance matching and radiation mode adjustment may be required for performance optimization.

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

Means for Solving the Problems

[0005] An object of the present invention is to provide a miniaturized sheet metal vibrator without a guide sheet, which has excellent electrical characteristics and radiation characteristics.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions. A sheet metal vibrator, comprising four vibrator arms arranged around the center of the sheet metal vibrator, wherein the vibrator arms are a main vibrator arm provided with a first cutout portion, a sub-vibrator arm that bends and extends from one end of the main vibrator arm away from the center, and the sub-vibrator arm is provided with a second cutout portion, a balun arranged at one end of the main vibrator arm close to the center and at least partially parallel to the sub-vibrator arm, including the baluns of two adjacent vibrator arms are arranged at least partially overlapping vertically.

[0007] As a further improved technical solution of the present invention, the balun of one of the vibrator arms has a first extension portion and a first vertical portion sequentially connected from one end of the main vibrator arm close to the center, and the first extension portion is arranged parallel to the main vibrator arm. The balun of the other adjacent vibrator arm includes a bent portion, a second extension portion, and a second vertical portion sequentially connected from one end of the main vibrator arm close to the center. The second extension portion is lower than the plane where the main vibrator arm is located, and the first extension portion is parallel to the second extension portion and arranged at least partially overlapping vertically.

[0008] As a further improved technical solution of the present invention, the sub-vibrator arm and the main vibrator arm are perpendicular to each other.

[0009] As a further improved technical solution of the present invention, the first extension portion is lower than the plane where the main vibrator arm is located.

[0010] As a further improved technical solution of the present invention, the two baluns of any two of the vibrator arms arranged opposite to each other are at least partially parallel.

[0011] As a further improved technical solution of the present invention, the center passes through the overlapping portion of the first extension and the second extension, the first vertical portion is located between the balun arranged opposite thereto and the center, and the second vertical portion is located between the balun arranged opposite thereto and the center.

[0012] As a further improved technical solution of the present invention, the maximum length of the main vibrator arm is 1 / 4 wavelength, and the perimeter of the second cutout is 1 / 4 wavelength.

[0013] As a further improved technical solution of the present invention, the first cutout is a closed-loop circular hole, and the second cutout is a closed-loop rectangular hole.

[0014] As a further improved technical solution of the present invention, the main vibrator arm is a hexagon in which any two opposite sides are parallel to each other, and the sub-vibrator arm is rectangular.

[0015] As a further improved technical solution of the present invention, the height of the balun is greater than the height of the sub-vibrator arm.

Advantages of the Invention

[0016] Compared with the prior art, the sheet metal vibrator of the present invention has the following beneficial effects. The vibrator arm includes a main vibrator arm, a sub-vibrator arm, and a balun. The main vibrator arm is provided with a first cutout, and the sub-vibrator arm is provided with a second cutout. It is used for expanding the frequency band and standing wave matching, can greatly reduce the weight of the sheet metal vibrator, and in order to meet the requirements of impedance matching, two adjacent baluns are arranged overlapping up and down. The sheet metal vibrator realizes miniaturization, weight reduction, and installation without a guide sheet, and has excellent electrical characteristics and radiation characteristics.

Brief Description of the Drawings

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Modes for Carrying Out the Invention

[0018] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments may be combined with each other as long as they do not conflict. When the description refers to the drawings, the same numbers in different drawings indicate the same or similar elements unless otherwise specified. The content described in the following specific embodiments does not represent all embodiments that conform to the present invention. Rather, these are merely examples of devices, products, and / or methods that are described in the scope of the utility model registration claims of the present invention and conform to some aspects of the present invention.

[0019] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the protection scope of this invention. In the specification and claims of this invention, the singular forms "one", "the foregoing" or "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0020] In the specification and claims of this invention, for example, terms such as "first", "second" and similar words do not represent any order, quantity or importance, but are only names for distinguishing features. Similarly, similar words such as "one" or "a" do not mean a numerical limit, but mean the existence of at least one. Unless otherwise specified, similar terms such as "front", "rear", "upper", "lower" etc. described in this invention are only for the convenience of description and are not limited to a specific position or spatial direction. Similar words such as "comprise" or "include" are open expressions meaning that the elements appearing before "comprise" or "include" include the elements appearing after "comprise" or "include" and their equivalents, which does not exclude the possibility that the elements appearing before "comprise" or "include" may also include other elements. When "several" appears in this invention, it means two or more.

[0021] Referring to FIGS. 1-9, in this embodiment, there are provided four oscillator arms 10 arranged around the center of the sheet metal oscillator, and each oscillator arm 10 comprises a main oscillator arm 11, a sub-oscillator arm 12 and a balun 13. The main oscillator arm 11 is arranged horizontally, and the sub-oscillator arm 12 and the balun 13 are arranged vertically, and a sheet metal oscillator is disclosed.

[0022] The sheet metal oscillator of this embodiment is a 4G sheet metal oscillator with an operating frequency of 1.7 GHz - 2.7 GHz used in a 4G Massive MIMO antenna. In this embodiment, 2 GHz is taken as an example of the operating frequency, and the operating wavelength of the sheet metal oscillator is the wavelength corresponding to the frequency of the radio signal transmitted and received by the sheet metal oscillator.

[0023] Referring to FIGS. 1-3, since the four oscillator arms 10 are uniformly distributed around the center, the four oscillator arms 10 are arranged in pairs facing each other.

[0024] Referring to FIGS. 1-3, the maximum length of the main oscillator arm 11 is 1 / 4 λ, where λ is the wavelength at 2 GHz. The main oscillator arm 11 is provided with a first cutout 111 for passing a conductor. In this embodiment, the first cutout 111 is a closed-loop circular hole. However, in other embodiments, the first cutout 111 may be a closed-loop square hole as long as the perimeter of the first cutout 111 is ensured to be installed at 40 mm ± 2 mm.

[0025] Referring to FIGS. 1-4, one end of the sub-oscillator arm 12 that is away from the center of the main oscillator arm 11 is bent and extended. Further, the main oscillator arm 11 and the sub-oscillator arm 12 are substantially L-shaped. The sub-oscillator arm 12 is provided with a second cutout 121. Further, the second cutout 121 is a closed-loop rectangular hole with a perimeter of 1 / 4 λ, which can play a role in frequency band expansion and standing wave matching. Therefore, the sheet metal oscillator of this embodiment does not need to be provided with a guide sheet for frequency band expansion, which helps to simplify and miniaturize the structure of the sheet metal oscillator, reduce material costs and assembly man-hours, effectively simplify the installation work, and has the advantages of application to antennas. In other embodiments, the second cutout 121 may be installed in other shapes as long as the perimeter of the second cutout 121 is ensured to be installed at 1 / 4 λ.

[0026] In this embodiment, the sub-oscillator arm 12 and the main oscillator arm 11 are perpendicular to each other.

[0027] Referring to FIGS. 1-5, the balun 13 is disposed at one end close to the center of the main oscillator arm 11, and the balun 13 is at least partially parallel to the sub-oscillator arm 12. The balun 13 performs impedance matching in the form of an air microstrip. In order to meet the requirements of impedance matching, two polarized baluns 13 disposed on two adjacent oscillator arms 10 are at least partially arranged vertically overlapping each other.

[0028] The four oscillator arms 10 form a feeding mode in which the lower ends of the two baluns 13 arranged vertically overlapping are used as feeding points 140, and the lower ends of the other two baluns 13 are used as grounding points 150. By superimposing the signals supplied from the two feeding points on each other to form two vector superimposed signals, two orthogonal polarization waves can be generated, and a dual-polarization antenna can be formed if applied to the antenna.

[0029] Referring to FIGS. 1-5, the balun 13 of one oscillator arm 10 includes a first extension portion 131 extending in a substantially horizontal direction and a first vertical portion 132 extending in a substantially vertical direction, which are sequentially connected from one end close to the center of the main oscillator arm 11. The balun 13 of the adjacent other oscillator arm 10 includes a bent portion 133, a second extension portion 134 extending in a substantially horizontal direction, and a second vertical portion 135 extending in a substantially vertical direction, which are sequentially connected from one end close to the center of the main oscillator arm 11. The second extension portion 134 is lower than the plane where the main oscillator arm 11 is located, and the first extension portion 131 and the second extension portion 134 are parallel and at least partially arranged vertically overlapping each other. Further, the first extension portion 131 is arranged parallel to the main oscillator arm 11.

[0030] Referring to FIGS. 4 and 5, in this embodiment, the first extension portion 131 is located in the same plane as the main oscillator arm 11, that is, the first extension portion 131 extends horizontally from one end close to the center of the main oscillator arm 11.

[0031] In other embodiments, the first extension portion 131 and the main oscillator arm 11 are lower than the plane where the main oscillator arm 11 is located, and the first extension portion 131 and the main oscillator arm 11 are connected by bending, so that the structural strength of the entire oscillator arm 10 is high. The second extension portion 134 is lower than the plane where the first extension portion 131 is located, and since the center passes through the portion where the first extension portion 131 and the second extension portion 134 overlap, the stability of the entire sheet metal oscillator is high.

[0032] Referring to FIGS. 1-3, the first vertical portion 132 is located between the center and the balun 13 disposed opposite thereto, and the second vertical portion 135 is located between the center and the balun 13 disposed opposite thereto. That is, the two polarized baluns 13 are respectively extended horizontally so as to approach the other two baluns 13 disposed opposite to each other, whereby the distance between the feeding point and the grounding point is reduced. Further, since these two baluns 13 extend in the horizontal direction, the vertical superposition can be better realized.

[0033] Referring to FIGS. 1, 3, and 5, the main oscillator arm 11 is a hexagon in which any two opposite sides are parallel to each other. The sub-oscillator arm 12 is connected to the side farthest from the center among these six sides, and the balun 13 is connected to the side closest to the center among these six sides, and the side farthest from the center and the side closest to the center are parallel to each other. The sub-oscillator arm 12 is rectangular, and when the second cutout portion 121 is a closed-loop rectangular hole, the four rectangular sides of the second cutout portion 121 respectively correspond to the four rectangular sides of the sub-oscillator arm 12 in parallel.

[0034] Referring to FIG. 4, the height of the balun 13 is larger than the height of the sub-oscillator arm 12. In this embodiment, power feeding is performed by the balun 13, and by converting and matching the electrical signal balanced relative to the reference ground and the electrical signal not balanced relative to the reference ground, the matching degree between the sheet metal oscillator and the feeding network is improved, and the signal transmission quality of the sheet metal oscillator is improved. In actual applications, the heights of the balun 13 and the sub-oscillator arm 12 can be reasonably adjusted according to actual needs.

[0035] The sheet metal oscillator of this embodiment can reduce its length and width to about 41 mm, which is only about two-thirds of the size of currently commercially available 1.7 GHz - 2.7 GHz oscillators, and realizes a further miniaturized structural design. It also has excellent electrical characteristics and radiation characteristics. Each oscillator arm 10 is formed by bending sheet metal and has high strength.

[0036] In the embodiment of this application, to more clearly explain the beneficial technical effects with excellent electrical performance and radiation performance, a data simulation diagram is also provided.

[0037] Referring to FIGS. 6 and 7, in FIG. 6, the horizontal axis represents the operating frequency with the unit of GHz, and the vertical axis represents the return loss with the unit of dB. In FIG. 7, the horizontal axis represents the operating frequency with the unit of GHz, and the vertical axis represents the degree of isolation with the unit of dB. The sheet metal oscillator of this embodiment has a return loss < -16 dB and a degree of isolation < -26 dB, reaching an excellent level in the industry.

[0038] Referring to FIGS. 8 and 9, the sheet metal oscillator of this embodiment has a 3 dB beam width converging to 60 - 68°, an axial cross polarization ratio reaching -18 dB, a ±60° cross polarization ratio reaching -8 dB, and a gain reaching 9.3 dB, all reaching excellent levels in the industry.

[0039] In summary, compared with the prior art, the sheet metal oscillator of this invention has the following advantages. The oscillator arm 10 includes a main oscillator arm 11, a sub-oscillator arm 12, and a balun 13. The main oscillator arm 11 is provided with a first cutout 111, and the sub-oscillator arm 12 is provided with a second cutout 111, which are used for expanding the frequency band and standing wave matching, and can greatly reduce the weight of the sheet metal oscillator. To meet the requirements of impedance matching, two adjacent baluns 13 are arranged overlapping vertically. The sheet metal oscillator realizes miniaturization, weight reduction, and installation without a guide sheet, and has excellent electrical characteristics and radiation characteristics.

[0040] The above embodiments are for explaining the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art. Although this specification has described the present invention in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the present invention. It should be understood that all technical solutions and their improvements that do not depart from the spirit and scope of the present invention are included in the scope of claims for utility model registration of the present invention.

Claims

1. A sheet metal oscillator, comprising four oscillator arms (10) arranged around the center of the sheet metal oscillator, and each of the oscillator arms (10) is a main oscillator arm (11) provided with a first cutout portion (111), a sub-oscillator arm (12) bent and extending from one end of the main oscillator arm (11) away from the center, and a second cutout portion (121) is provided on the sub-oscillator arm (12), a balun (13) disposed at one end of the main oscillator arm (11) close to the center and at least partially parallel to the sub-oscillator arm (12), including the baluns (13) of two adjacent oscillator arms (10) are at least partially arranged one above the other, and the sheet metal oscillator is characterized by this.

2. The balun (13) of one of the oscillator arms (10) includes a first extension portion (131) and a first vertical portion (132) sequentially connected from one end of the main oscillator arm (11) close to the center. The first extension portion (131) is arranged parallel to the main oscillator arm (11), the balun (13) of the other adjacent oscillator arm (10) includes a bent portion (133), a second extension portion (134), and a second vertical portion (135) sequentially connected from one end of the main oscillator arm (11) close to the center. The second extension portion (134) is lower than the plane where the main oscillator arm (11) is located, and the first extension portion (131) is parallel to the second extension portion (134) and at least partially arranged one above the other. The sheet metal oscillator according to Claim 1 is characterized by this.

3. The sub-oscillator arm (12) and the main oscillator arm (11) are perpendicular to each other, and the sheet metal oscillator according to Claim 1 is characterized by this.

4. The first extension portion (131) is lower than the plane where the main oscillator arm (11) is located, and the sheet metal oscillator according to Claim 2 is characterized by this.

5. The two baluns (13) of any two oscillator arms (10) arranged opposite to each other are at least partially parallel, and the sheet metal oscillator according to Claim 2 is characterized by this.

6. The center passes through the overlapping portion of the first extension part (131) and the second extension part (134), the first vertical part (132) is located between the balun (13) disposed opposite thereto and the center, and the second vertical part (135) is located between the balun (13) disposed opposite thereto and the center. The sheet metal vibrator according to claim 2, characterized in that.

7. The maximum length of the main vibrator arm (11) is 1 / 4 wavelength, and the perimeter of the second cutout part (121) is 1 / 4 wavelength. The sheet metal vibrator according to claim 1, characterized in that.

8. The first cutout part (111) is a closed-loop circular hole, and the second cutout part (121) is a closed-loop rectangular hole. The sheet metal vibrator according to claim 1, characterized in that.

9. The main vibrator arm (11) is a hexagon in which any two opposite sides are parallel to each other, and the sub-vibrator arm (12) is rectangular. The sheet metal vibrator according to claim 1, characterized in that.

10. The height of the balun (13) is greater than the height of the sub-vibrator arm (12). The sheet metal vibrator according to claim 1, characterized in that.

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