Multi-frequency omnidirectional antenna

Abstract

The utility model relates to the technical field of wireless communication equipment, in particular to a multi-frequency omnidirectional antenna, which comprises three antenna sector assemblies and a rotating shaft, the three sector assemblies are connected end to end to form a triangular prism structure, a plurality of first rotating shaft sleeves are arranged on one side edge of each sector assembly along the length direction, and a plurality of second rotating shaft sleeves are arranged on the other side edge of each sector assembly. A plurality of second rotating shaft sleeves are arranged on the other side edge corresponding to the sector assemblies in the length direction in a staggered mode relative to the first rotating shaft sleeves, and any two adjacent sector assemblies in the three sector assemblies are connected in the mode that the rotating shafts are inserted into the first rotating shaft sleeves and the second rotating shaft sleeves. The three sector assemblies are connected through the rotating shaft connecting structures, the three sector assemblies can be flattened to form a plane structure, visual operation of feed cable connection among the sector assemblies is achieved, meanwhile, possibility is provided for operation quality inspection, and the rotating shaft connecting structures enable antenna installation to be more time-saving and labor-saving for large-size and heavy antennas.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication equipment, in particular to a multi-frequency omnidirectional antenna. Background Art

[0002] Modern cellular communications require that a single antenna should maintain an RF link with multiple mobile devices. Omnidirectional antennas are preferred because of their 360-degree omnidirectional radiation and easy installation. ±45° dual-polarization multi-frequency omnidirectional antennas are usually synthesized horizontally by three or more sectors of ±45° dual-polarization antenna arrays. For the convenience of production and manufacturing, traditional multi-frequency omnidirectional antennas are often structured using three or more plate-shaped antennas through sector connection devices. On the one hand, in order to obtain better sector connection reliability, such sector connection devices are usually made of high-strength metal materials. The large number of metal connection points causes a large risk of intermodulation and high control difficulty. On the other hand, sector antennas need to be connected electrically, that is, RF cables are required to connect across sectors, which brings great difficulties to the manufacture of multi-frequency omnidirectional antennas and also brings great risks to the quality of RF electrical connections between sector antennas. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-frequency omnidirectional antenna, realize simple and reliable connection between sector antennas, and provide the possibility for visual operation (welding and wiring, etc.) of radio frequency electrical connection between sector antennas and operation quality inspection. At the same time, the diameter of the multi-frequency omnidirectional antenna is compressed as much as possible to obtain a relatively small size, and the types and quantities of materials used can also be reduced, which is convenient for manual operation and reduces assembly time, thereby reducing manufacturing costs.

[0004] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0005] A multi-frequency omnidirectional antenna comprises three antenna sector assemblies and a rotating shaft. The three sector assemblies are connected end to end to form a triangular prism structure. A plurality of first rotating shaft sleeves are arranged along the length direction of one side edge of the sector assembly. A plurality of second rotating shaft sleeves are arranged along the length direction of the other side edge corresponding to the sector assembly and are staggered relative to the first rotating shaft sleeve. Any two adjacent sector assemblies among the three sector assemblies are connected by inserting the rotating shaft into the first rotating shaft sleeve and the second rotating shaft sleeve.

[0006] A further improvement is that the number of the first rotating shaft sleeves is twice the number of the second rotating shaft sleeves, and the second rotating shaft sleeve is located between two of the first rotating shaft sleeves.

[0007] A further improvement is that a positioning fastener is installed on the rotating shaft to limit the axial movement of the rotating shaft.

[0008] A further improvement is that the positioning fastener is a circular ring structure with an open ring, the inner wall of the circular ring with an open ring is provided with a pin passing through the axis of the circular ring, the circular ring with an open ring passes through the rotating shaft through the opening and wraps the rotating shaft, the pin is inserted into the through hole opened on the rotating shaft, the circular ring with an open ring is located in the gap between the first rotating shaft sleeve and the second rotating shaft sleeve and the outer diameter of the circular ring with an open ring is larger than the inner diameter of the first rotating shaft sleeve and the second rotating shaft sleeve.

[0009] A further improvement is that the circular ring with an opening is coaxially arranged with the rotating shaft, the first rotating shaft sleeve, and the second rotating shaft sleeve.

[0010] A further improvement is that the sector assembly includes a reflector and a plurality of columns of radiation unit arrays mounted on the reflector.

[0011] A further improvement is that the reflector is a sheet metal part, and the first rotating shaft sleeve and the second rotating shaft sleeve are formed by bending the edges of both sides of the reflector and are non-fully enclosed circular ring structures.

[0012] A further improvement is that avoidance notches for accommodating the first rotating shaft sleeve are respectively provided on both sides of the second rotating shaft sleeve on the reflecting plate.

[0013] A further improvement is that the plurality of columns of radiation element arrays are composed of radiation elements of the same frequency or different frequencies.

[0014] A further improvement is that each column of the radiation element array includes at least one radiation element.

[0015] The beneficial effects of the utility model are:

[0016] The utility model connects the three sector components with a rotating shaft connection structure, so that the three sector components can be flattened into a plane structure, realizing the visual operation of the feeder cable connection between the sector components (such as welding and wiring, etc.), and providing the possibility for the quality inspection of the operation. In particular, for large-sized and heavy antennas, the rotating shaft connection structure makes the antenna installation more time-saving and labor-saving.

[0017] The utility model reduces the connection points of the reflector by bending the material of the reflector itself to form a shaft sleeve, without adding additional materials. At the same time, a shaft and positioning fasteners made of non-metallic materials are used to avoid metal contact, which is beneficial to the stability of the third-order intermodulation of the omnidirectional antenna. In addition, the shaft sleeve is made by bending the material of the reflector itself, which can save installation space, compress the width of the reflector, and further reduce the diameter of the multi-frequency omnidirectional antenna.

[0018] The utility model sets up different rotating shaft sleeve structures on both sides of the sector components, so that the three sector components can be connected in pairs, and the three sector components can be made of the same component material, which reduces the types and quantities of materials used, facilitates manual operation and reduces assembly time, thereby reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional appearance diagram of a multi-frequency omnidirectional antenna of the utility model;

[0020] Figure 2 This is a three-dimensional appearance diagram of a single sector assembly in the utility model;

[0021] Figure 3 It is a plan view of the three sector components after being flattened;

[0022] Figure 4 It is a plan view of the combination of three sector components;

[0023] Figure 5 It is an exploded diagram of the connection structure between sector components;

[0024] Figure 6 is a structural schematic diagram of the rotating shaft;

[0025] Figure 7 is a schematic diagram of the structure of the positioning fastener;

[0026] Figure 8 It is a cross-sectional view of the connection structure between sector components;

[0027] Fig. 9 for Figure 1 A schematic diagram of the enlarged structure in the middle.

[0028] Description of reference numerals:

[0029] 101. First sector assembly; 102. Second sector assembly; 103. Third sector assembly; 110. Reflector; 120. Low-frequency radiation unit; 130. High-frequency radiation unit; 111. First shaft sleeve; 112. Second shaft sleeve; 113. Avoidance gap; 200. Shaft; 210. Through hole; 300. Positioning fastener; 310. Latch; 320. Opening. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and do not limit the protection scope of the utility model.

[0031] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. Furthermore, when an element is considered to be "transmission-connected" to another element, the two can achieve power transmission, and its specific implementation method can be implemented using the existing technology, which will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0034] Please refer to the attached Figure 1 -Attached Fig. 9 The utility model embodiment provides a multi-frequency omnidirectional antenna, which includes three antenna sector components and a rotating shaft 200. The three sector components are connected end to end to form a triangular prism structure. A plurality of first rotating shaft sleeves 111 are arranged along the length direction of one side edge of the sector component. A plurality of second rotating shaft sleeves 112 are arranged in a staggered manner relative to the first rotating shaft sleeve 111 along the length direction of the other side edge corresponding to the sector component. Any two adjacent sector components among the three sector components are connected by inserting the rotating shaft 200 into the first rotating shaft sleeve 111 and the second rotating shaft sleeve 112.

[0035] In a preferred solution of this embodiment, the number of the first rotating shaft sleeves 111 is twice the number of the second rotating shaft sleeves 112 , and the second rotating shaft sleeves 112 are located between two of the first rotating shaft sleeves 111 during assembly.

[0036] like Figure 1 , Figure 2 , Figure 7As shown, a positioning fastener 300 is installed on the rotating shaft 200, and the positioning fastener 300 is detachably installed on the rotating shaft 200 to limit the axial movement of the rotating shaft 200. The positioning fastener 300 is a circular ring structure with an opening, and a circular plug 310 passing through the axis of the circular ring is arranged on the inner wall of the circular ring with an opening. The circular ring with an opening passes through the rotating shaft 200 through an opening 320 and wraps the rotating shaft 200. The plug 310 is inserted into the through hole 210 opened on the rotating shaft 200. The circular ring with an opening is located in the gap between the first rotating shaft sleeve 111 and the second rotating shaft sleeve 112, and the outer diameter of the circular ring with an opening is larger than the inner diameter of the first rotating shaft sleeve 111 and the second rotating shaft sleeve 112.

[0037] The open ring is coaxially arranged with the rotating shaft 200 , the first rotating shaft sleeve 111 , and the second rotating shaft sleeve 112 .

[0038] The following is a more detailed description of a multi-frequency omnidirectional antenna provided in this embodiment. For easy distinction, this embodiment names the three antenna sector components as a first sector component 101, a second sector component 102, and a third sector component 103, respectively.

[0039] Specifically, in this embodiment, the sector assembly has three groups of rotating shaft sleeves set up along the length direction on one side in the width direction, and each group of rotating shaft sleeves includes two first rotating shaft sleeves 111; three groups of rotating shaft sleeves are also set up on the corresponding other side, and each group of rotating shaft sleeves includes a second rotating shaft sleeve 112. During assembly, the first rotating shaft sleeve 111 set up on the first sector assembly 101 and the second rotating shaft sleeve 112 set up on the second sector assembly 102 or the third sector assembly 103 cooperate to form a plurality of adjacent combined rotating shaft sleeve assemblies with coaxial centers along the length direction of the sector assembly, that is, a combined rotating shaft sleeve assembly is composed of two first rotating shaft sleeves 111 and one second rotating shaft sleeve 112, and the second rotating shaft sleeve 112 is located between the two first rotating shaft sleeves 111. At the same time, the rotating shaft 200 and the combined rotating shaft sleeve assembly cooperate to form a rotating shaft connection structure, and the three sector assemblies are connected to each other through the rotating shaft connection structure.

[0040] The rotating shaft 200 is installed in the combined rotating shaft sleeve assembly, and the pin 310 of the positioning fastener 300 is inserted into the through hole 210 set up in the rotating shaft 200, so that the rotating shaft 200 is confined in the combined rotating shaft sleeve assembly and cannot move axially, and the sector assembly can rotate in a circle around the rotating shaft 200.

[0041] The positioning fastener 300 is axially restricted by the combined rotating shaft sleeve assembly composed of the first rotating shaft sleeve 111 and the second rotating shaft sleeve 112, so that the positioning fastener 300 cannot be separated from the combined rotating shaft sleeve assembly, and the rotating shaft 200 is restricted in the combined rotating shaft sleeve assembly.

[0042] The positioning fastener 300 is made of non-metallic material, preferably a high-strength, wear-resistant plastic material. This embodiment uses POM material.

[0043] The rotating shaft 200 and the combined rotating shaft sleeve assembly are coaxially clearance matched. The rotating shaft 200 needs to be smeared with lubricating grease to make the rotation smoother and easier, reduce abnormal noise, and make the sector assembly rotate more easily; the rotating shaft 200 and the positioning fastener 300 are radially clearance matched; the positioning fastener 300 and the combined rotating shaft sleeve assembly are axially clearance matched.

[0044] like Figure 3 As shown, when the first sector assembly 101 and the second sector assembly 102 are connected and the first sector assembly 101 and the third sector assembly 103 are connected, the three sector assemblies can be flattened into a planar structure. Figure 4 As shown, when the second sector assembly 102 and the third sector assembly 103 are rotated to be close to each other and connected, they form an equilateral triangle (triangular prism structure), and the three sector assemblies are fixed and cannot rotate.

[0045] It can be understood that the three sector components can be flattened into a planar structure, which can realize the visual operation of the feed cable connection between the sector components (such as welding and wiring, etc.), and at the same time provide the possibility for the inspection of the operation quality. In particular, for large-sized and heavy antennas, the hinge connection structure makes the antenna installation more time-saving and labor-saving.

[0046] Specifically, the sector assembly includes a reflector 110 and a plurality of columns of radiation element arrays mounted on the reflector 110, wherein the plurality of columns of radiation element arrays are composed of radiation elements of the same frequency or different frequencies, and each column of the radiation element array includes at least one radiation element.

[0047] As a preferred solution of this embodiment, Figure 1 and Figure 2As shown, the sector assembly includes a reflector 110, and three columns of radiation unit arrays set up along the width direction of the reflector 110, and the three columns of radiation unit arrays are composed of radiation units of different frequencies, wherein the middle radiation unit array is a low-frequency radiation unit 120 array, and the left and right arrays are high-frequency radiation unit 130 arrays. The number of low-frequency radiation units 120 in the middle low-frequency radiation unit 120 array is 6, and the number of high-frequency radiation units 130 in the left and right high-frequency radiation unit 130 arrays is 12. This embodiment uses three columns of radiation unit arrays only for better explanation but not to limit the number of radiation unit arrays and radiation units. Those skilled in the art can set the number of radiation unit arrays and radiation units according to actual needs.

[0048] In this embodiment, the reflector 110 is a sheet metal part made of aluminum alloy. The density of aluminum alloy is lower than that of other metal materials, and it has good structural strength and light weight, which can effectively reduce the weight of the antenna. The first rotating shaft sleeve 111 and the second rotating shaft sleeve 112 are formed by bending the edges of the two sides of the reflector 110 through their own materials and are non-fully enclosed circular ring structures. The first rotating shaft sleeve 111 and the second rotating shaft sleeve 112 have the same diameter.

[0049] It can be understood that, by bending the edges of the two side edges of the reflector 110 through their own materials, the first rotating shaft sleeve 111 and the second rotating shaft sleeve 112 are formed, which can reduce more assembly connection points caused by using other materials, thereby reducing the third-order intermodulation risk caused by additional assembly, and saving installation space, which is conducive to compressing the width of the reflector 110, and further reducing the diameter of the multi-frequency omnidirectional antenna.

[0050] By setting up different rotating shaft sleeve structures on both sides of the reflective plate 110, the three sector components can be connected in pairs, and the three sector components can be made of the same component material, which is convenient for production and assembly and installation without special distinction, reducing the types and quantities of materials used, facilitating workers' operation and reducing assembly hours, thereby reducing manufacturing costs.

[0051] like Figure 1 , Figure 2 , Figure 6 As shown, the rotating shaft 200 is a round rod structure, on which a through hole 210 is set to penetrate and pass through the axis of the round rod in the radial direction. The rotating shaft 200 is made of non-metallic materials, and according to the commonly used materials in the antenna industry, the preferred material in this embodiment is glass fiber reinforced plastic.

[0052] The outer diameter of the rotating shaft 200 is smaller than the inner diameter of the combined rotating shaft sleeve assembly. The rotating shaft 200 is inserted into the combined rotating shaft sleeve assembly to form a coaxial rotating shaft connection structure. The rotating shaft 200 is wrapped by the combined rotating shaft sleeve assembly and is radially restricted.

[0053] Furthermore, if Figure 2 As shown, avoidance notches 113 for accommodating the first rotating shaft sleeve 111 are respectively provided on both sides of the second rotating shaft sleeve 112 on the reflecting plate 110 .

[0054] The multi-frequency omnidirectional antenna provided in this embodiment reduces the types and quantities of connecting materials between sector components, and the sector components are easy to install, effectively avoiding the hidden dangers brought by the installation scheme of the prior art, making the assembly of the omnidirectional antenna time-saving and labor-saving, and effectively reducing manufacturing costs.

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

[0056] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A multi-frequency omnidirectional antenna, characterized in that: It includes three antenna sector assemblies and a rotating shaft. The three sector assemblies are connected end to end to form a triangular prism structure. A plurality of first rotating shaft sleeves are arranged along the length direction of one side edge of the sector assembly. A plurality of second rotating shaft sleeves are arranged along the length direction of the other side edge corresponding to the sector assembly and are staggered relative to the first rotating shaft sleeve. Any two adjacent sector assemblies among the three sector assemblies are connected by inserting the rotating shaft into the first rotating shaft sleeve and the second rotating shaft sleeve.

2. The multi-frequency omnidirectional antenna according to claim 1, characterized in that: The number of the first rotating shaft sleeves is twice the number of the second rotating shaft sleeves, and the second rotating shaft sleeve is located between two of the first rotating shaft sleeves.

3. A multi-frequency omnidirectional antenna according to claim 1 or 2, characterized in that: A positioning fastener is installed on the rotating shaft to limit the axial movement of the rotating shaft.

4. The multi-frequency omnidirectional antenna according to claim 3, characterized in that: The positioning fastener is a structure with an open circular ring, and the inner wall of the open circular ring is provided with a pin passing through the axis of the circular ring. The open circular ring passes through the rotating shaft through the opening and wraps the rotating shaft, and the pin is inserted into the through hole opened on the rotating shaft. The open circular ring is located in the gap between the first rotating shaft sleeve and the second rotating shaft sleeve, and the outer diameter of the open circular ring is larger than the inner diameter of the first rotating shaft sleeve and the second rotating shaft sleeve.

5. The multi-frequency omnidirectional antenna according to claim 4, characterized in that: The open ring is coaxially arranged with the rotating shaft, the first rotating shaft sleeve, and the second rotating shaft sleeve.

6. The multi-frequency omnidirectional antenna according to claim 1, characterized in that: The sector assembly comprises a reflective plate and a plurality of radiation unit arrays mounted on the reflective plate.

7. The multi-frequency omnidirectional antenna according to claim 6, characterized in that: The reflector is a sheet metal part, and the first rotating shaft sleeve and the second rotating shaft sleeve are formed by bending the edges of both sides of the reflector and are non-fully enclosed circular ring structures.

8. The multi-frequency omnidirectional antenna according to claim 7, characterized in that: The reflective plate is provided with avoidance notches on both sides of the second rotating shaft sleeve for accommodating the first rotating shaft sleeve.

9. The multi-frequency omnidirectional antenna according to claim 6, characterized in that: The plurality of columns of radiation element arrays are composed of radiation elements of the same frequency or different frequencies.

10. The multi-frequency omnidirectional antenna according to claim 6, characterized in that: Each column of the radiation element array includes at least one radiation element.

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