Mechanical adjusting device for antenna radiation pattern

Abstract

The utility model discloses a mechanical adjusting device for an antenna radiation pattern. The mechanical adjusting device comprises a fence type push-pull mechanism, an antenna tray and a bracket, the antenna tray is horizontally installed on the support, and the fence type push-pull mechanism is horizontally installed on the support and located above the antenna tray, so that the fence type push-pull mechanism is located in an antenna radiation area. The fence type push-pull mechanism comprises a fixed rod, a pull rod and meshes, the fixed rod is fixedly installed on the support, the multiple meshes are arranged and hinged between the fixed rod and the pull rod in parallel, the pull rod is stressed to slide in the left-right direction to drive the meshes to rotate in the horizontal plane, and therefore the spacing distance between the meshes is changed. According to the utility model, by changing the opening and closing degree of the fence type push-pull mechanism in the antenna radiation area, the energy distribution state in the area is influenced, and the function of adjusting the antenna radiation pattern is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of microwave antenna design, and in particular relates to a mechanical adjustment device for antenna radiation pattern. Background Art

[0002] The antenna radiation pattern is an important working indicator of the antenna, which describes how the microwave energy is distributed around the antenna. Reasonable control of the antenna radiation pattern can focus the energy emitted by the antenna to a certain position or evenly distribute it in multiple areas. Usually, after the antenna unit is manufactured, its radiation pattern is relatively fixed. In order to make the antenna meet certain specific working requirements, an external antenna radiation pattern control device is required to adjust the distribution state of the antenna radiation energy.

[0003] At present, the adjustment devices for antenna radiation patterns are mainly divided into changing the antenna body or adding structural devices to the antenna radiation area. For the control method of directly changing the antenna body, the electronic structure changes the current distribution inside the antenna through an external control circuit device, affecting the distribution of the antenna radiation energy, thereby achieving the purpose of adjusting the antenna radiation pattern. However, electronic structures often have problems such as complex structure and electromagnetic interference, and are also accompanied by high costs and possible damage to the antenna. Adding auxiliary devices to the antenna radiation area can make it easier and more direct to adjust the shape of the antenna radiation pattern without the risk of damaging the antenna. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the utility model provides a mechanical adjustment device for antenna radiation pattern, including a fence-type push-pull mechanism, an antenna tray and a bracket. The fence-type push-pull mechanism is located in the antenna radiation area. By changing the opening and closing degree of the fence-type push-pull mechanism in the antenna radiation area, the energy distribution state inside the area is affected, and the antenna radiation pattern adjustment function is realized. The device can simplify the complexity of the electronic adjustment device and is used as a cheap, simple and safe antenna radiation pattern adjustment device.

[0005] The purpose of the utility model is achieved through the following technical solutions, combined with the accompanying drawings:

[0006] A mechanical adjustment device for antenna radiation pattern comprises a fence-type push-pull mechanism 1, an antenna tray 2 and a bracket 3; the antenna tray 2 is horizontally mounted on the bracket 3, the fence-type push-pull mechanism 1 is horizontally mounted on the bracket 3 and is located above the antenna tray 2, so that the fence-type push-pull mechanism 1 is located within the radiation area of ​​the antenna 4; the fence-type push-pull mechanism 1 comprises a fixed rod 11, a pulling rod 12 and a mesh 13, the fixed rod 11 is fixedly mounted on the bracket 3, a plurality of meshes 13 are arranged in parallel and hinged between the fixed rod 11 and the pulling rod 12, and the pulling rod 12 is forced to slide to the left and right directions, thereby driving the meshes 13 to rotate in the horizontal plane, thereby changing the spacing distance between each mesh 13.

[0007] Furthermore, the fixing rod 11 and the pulling rod 12 have the same structure; a plurality of connecting ends 111 are arranged in parallel on the fixing rod 11 , and each connecting end 111 is used to connect a mesh 13 .

[0008] Furthermore, a mesh limiting groove 112 is constructed around each connecting end 111 on the fixing rod 11 .

[0009] Furthermore, the mesh limiting groove 112 is an isosceles triangle-like groove, the vertex of the isosceles triangle is composed of a circular arc, the arc length of which is 2π / 3 times the mesh width, the angle between the two sides of the isosceles triangle and the base is 30 degrees, and the spacing between two adjacent connecting ends 111 is twice the mesh width.

[0010] Furthermore, a fixing cover plate 14 is installed on the fixing rod 11 and the pulling rod 12 respectively.

[0011] Furthermore, the pulling rod 12 has a rotation range of 120 degrees relative to the fixing rod 11 .

[0012] Furthermore, the bracket 3 includes a vertical connecting rod 33, a horizontal connecting rod 32, a support rod 31, a support foot 35 and a small round rod 34; the root support rod 31 and the two horizontal connecting rods 32 are fixed by the small round rod 34 to form a frame structure, and the support foot 35 is fixed at the bottom of the support rod 31; the vertical connecting rod 33 is inserted into the horizontal connecting rod 32, and the fence-type push-pull mechanism 1 and the antenna tray 2 are respectively sleeved on the vertical connecting rod 33.

[0013] Furthermore, the antenna tray 2 and the fence-type push-pull mechanism 1 can slide on the vertical connecting rod 33 of the bracket 3 to change the distance between the antenna and the mesh and adapt to different antenna operating frequencies.

[0014] The utility model has the following beneficial effects:

[0015] The utility model provides a mechanical adjustment device for antenna radiation pattern, comprising a fence type push-pull mechanism, an antenna tray and a bracket, wherein the fence type push-pull mechanism is located in the antenna radiation area, and the energy distribution state inside the area is affected by changing the opening and closing degree of the fence type push-pull mechanism in the antenna radiation area, thereby realizing the function of adjusting the antenna radiation pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without creative work.

[0017] Figure 1 It is an assembly diagram of a mechanical adjustment device for antenna radiation pattern according to an embodiment of the utility model;

[0018] Figure 2 Schematic diagram of the structure of the fence type push-pull mechanism in the embodiment of the utility model

[0019] Figure 3 Schematic diagram of the fixing rod structure in the embodiment of the utility model

[0020] Figure 4 Schematic diagram of the planar structure of the fixing rod in the embodiment of the utility model

[0021] Figure 5 Schematic diagram of different postures of the fence type push-pull mechanism in the embodiment of the utility model

[0022] Figure 6 This is a schematic diagram of the support structure in an embodiment of the utility model;

[0023] In the figure:

[0024] 1-Fence type push-pull mechanism; 2-antenna tray; 3-bracket; 4-antenna;

[0025] 11-fixed rod; 12-pull rod; 13-mesh; 14-fixed cover plate;

[0026] 111-connecting end; 112-mesh limiting groove;

[0027] 31-support rod; 32-horizontal connecting rod; 33-vertical connecting rod; 34-small round rod; 35-support foot. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present utility model.

[0031] Example

[0032] like Figure 1 As shown, this embodiment is a mechanical adjustment device for antenna radiation pattern, which consists of three parts: a fence-type push-pull mechanism 1, an antenna tray 2 and a bracket 3; the antenna tray 2 is horizontally mounted on the bracket 3, and the fence-type push-pull mechanism 1 is horizontally mounted on the bracket 3 and is located above the antenna tray 2, so that the fence-type push-pull mechanism 1 is located in the radiation area of ​​the antenna 4; Figure 2 As shown, the fence-type push-pull mechanism 1 includes a fixed rod 11, a pulling rod 12 and a mesh 13. The fixed rod 11 is fixedly mounted on the bracket 3. A plurality of meshes 13 are arranged in parallel and hinged between the fixed rod 11 and the pulling rod 12. When the pulling rod 12 is forced to slide in the left and right directions, the meshes 13 are driven to rotate in the horizontal plane, thereby changing the spacing between the meshes 13. This embodiment achieves the function of adjusting the antenna radiation pattern by changing the opening and closing degree of the fence-type push-pull mechanism in the antenna radiation area, affecting the energy distribution state inside the area.

[0033] Furthermore, a fixing cover plate 14 is installed on the fixing rod 11 and the pulling rod 12 respectively.

[0034] In this embodiment, the fixed cover plate 14 is assembled with the fixed rod 11 or the pulling rod 12 through a mortise and tenon structure, and is used to fix the connection between the mesh 13 and the fixed rod 11 and the mesh 13 and the pulling rod 12 to prevent the mesh 13 from falling off.

[0035] In this embodiment, the fixing rod 11 is inserted into the vertical connecting rod 33 of the bracket 3 and is connected to the bracket 3 .

[0036] Furthermore, the fixing rod 11 and the pulling rod 12 have the same structure.

[0037] In this embodiment, the fixing rod 11 has a length of 139.32 mm and a thickness of 20 mm.

[0038] Furthermore, if Figure 3 As shown, a plurality of connecting ends 111 are arranged in parallel on the fixing rod 11 , and each connecting end 111 is used to connect a mesh 13 .

[0039] In this embodiment, five connecting ends are arranged on the fixing rod 11 .

[0040] Furthermore, if Figure 3 As shown, in order to make the meshes rotate smoothly and contact each other, a mesh limiting groove 112 is constructed around each connecting end 111 on the fixing rod 11 .

[0041] In this embodiment, the mesh limiting groove 112 is an isosceles triangle-like groove, the vertex of the triangle is composed of a circular arc, the arc length is 2π / 3 times the mesh width, the angle between the two sides of the triangle and the base is 30 degrees, and the distance between two adjacent connecting ends 111 is twice the mesh width.

[0042] In this embodiment, Figure 4 As shown, the length of the mesh 13 is 182 mm, the width is 12 mm, the radius of the circular hole connecting the mesh 13 and the connecting end 111 is 3 mm, and the two ends of the mesh are respectively installed on the connecting ends of the fixing rod and the pulling rod.

[0043] Furthermore, the pull rod 12 has a 120-degree moving stroke relative to the fixed rod 11. When the pull rod moves, the posture of the fence-type push-pull mechanism changes as follows: Figure 5 shown.

[0044] When the meshes are in contact with each other, the antenna radiation area is filled with a reflector of the same thickness (the reflector is actually a whole formed by multiple meshes in contact with each other), and the dielectric constant of the reflector is the inherent dielectric constant of the 3D printing material used by the mesh. The reflector plays a major role in changing the radiation pattern of the antenna. As the pull rod is slid, the distribution ratio of the reflector and the air in the area above the antenna will change, and the antenna radiation pattern will also change.

[0045] Furthermore, the antenna tray 2 is located below the fence-type push-pull mechanism 1, and the antenna tray and the fence-type push-pull mechanism can slide on the vertical connecting rod 33 of the bracket 3 to change the distance between the antenna and the mesh to adapt to different antenna operating frequencies.

[0046] The antenna tray is sleeved in the vertical connecting rod of the bracket and connected with the bracket base.

[0047] In this embodiment, the length of the antenna tray 2 is 180 mm and the width is 139.32 mm. The antenna 4 can be placed flat in the antenna tray 2. When the antenna tray is in use, a hole can be punched at the position of the antenna connector to facilitate the passage of the radio frequency cable through the tray.

[0048] Furthermore, the bracket 3 includes a vertical connecting rod 33, a horizontal connecting rod 32, a support rod 31, a support foot 35 and a small round rod 34; the root support rod 31 and the two horizontal connecting rods 32 are fixed by the small round rod 34 to form a frame structure, and the support foot 35 is fixed at the bottom of the support rod 31; the vertical connecting rod 33 is inserted into the horizontal connecting rod 32, and the fence-type push-pull mechanism 1 and the antenna tray 2 are respectively sleeved on the vertical connecting rod 33.

[0049] In this embodiment, the horizontal connecting rod 32 can be embedded in the support rod 31, and a round hole is reserved at the corresponding installation position. After assembly, it can be seen that the round hole passes through the horizontal connecting rod and the support rod of the bracket. At this time, inserting the small round rod completes the assembly and locking.

[0050] The overall manufacturing and assembly process of this embodiment is as follows: Figure 1 shown.

[0051] The structure contains multiple parts, and each part can be printed one by one by a 3D printer: Use the 3D modeling software FreeCAD to build the above part model. Combined with the performance requirements of the 3D printer and the economic constraints, a more common PLA material is selected. The printer used in this example can print ordinary engineering plastics and supports printing of a variety of consumables up to 300°C, such as PLA, ABS, PC, TPE and other materials. Its printing size can reach 300mm×300mm×605mm, and the minimum printing layer thickness can be as low as 0.1mm. Import the part models one by one into the 3D printer slicing software, set the necessary parameters such as nozzle temperature, printing speed, single layer thickness, preview and generate task files, and send them to the 3D printer for printing separately, and finally complete the assembly in a unified manner.

[0052] Assemble the parts with the printed number: the two ends of the mesh are respectively installed on the cylindrical ends of the fixed rod and the pull rod. The upper additional cover plate can prevent the mesh from falling off. The small cylinder on the cover plate is inserted into the circular grooves on the fixed rod and the pull rod to complete the assembly. The fixed rod, antenna tray and bracket base are connected through the bracket vertical connecting rod. The vertical connecting rod is inserted into the three to complete the assembly. The horizontal connecting rod of the bracket can be embedded in the support rod. The corresponding installation position has a round hole reserved. After the assembly is in place, it can be seen that the round hole runs through the horizontal connecting rod and the support rod of the bracket. At this time, insert the small round rod to complete the assembly and lock.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical adjustment device for antenna radiation pattern, characterized in that: The invention comprises a fence-type push-pull mechanism (1), an antenna tray (2) and a bracket (3); the antenna tray (2) is horizontally mounted on the bracket (3); the fence-type push-pull mechanism (1) is horizontally mounted on the bracket (3) and is located above the antenna tray (2), so that the fence-type push-pull mechanism (1) is located within the radiation area of ​​the antenna (4); the fence-type push-pull mechanism (1) comprises a fixing rod (11), a pulling rod (12) and a mesh (13); the fixing rod (11) is fixedly mounted on the bracket (3); a plurality of meshes (13) are arranged in parallel and hinged between the fixing rod (11) and the pulling rod (12); when the pulling rod (12) is forced to slide in the left and right directions, the meshes (13) are driven to rotate in the horizontal plane, thereby changing the spacing between the meshes (13).

2. The mechanical adjustment device for antenna radiation pattern according to claim 1, characterized in that: The fixed rod (11) and the pulling rod (12) have the same structure; a plurality of connecting ends (111) are arranged in parallel on the fixed rod (11), and each connecting end (111) is used to connect a mesh sheet (13).

3. The mechanical adjustment device for antenna radiation pattern according to claim 2, characterized in that: The fixing rod (11) is provided with a mesh limiting groove (112) around each connecting end (111).

4. The mechanical adjustment device for antenna radiation pattern according to claim 3, characterized in that: The mesh limiting groove (112) is an isosceles triangle-like groove, the vertex of the isosceles triangle is composed of a circular arc, the arc length of which is 2π / 3 times the mesh width, the angle between the two sides of the isosceles triangle and the base is 30 degrees, and the spacing between two adjacent connecting ends (111) is twice the mesh width.

5. The mechanical adjustment device for antenna radiation pattern according to claim 2, characterized in that: The fixing rod (11) and the pulling rod (12) are respectively provided with fixing cover plates (14).

6. The mechanical adjustment device for antenna radiation pattern according to claim 1, characterized in that: The pulling rod (12) has a rotational travel of 120 degrees relative to the fixing rod (11).

7. The mechanical adjustment device for antenna radiation pattern according to claim 1, characterized in that: The bracket (3) comprises a vertical connecting rod (33), a horizontal connecting rod (32), a support rod (31), a support foot (35) and a small round rod (34); a support rod (31) and two horizontal connecting rods (32) are fixed by the small round rod (34) to form a frame structure, and the support foot (35) is fixed to the bottom of the support rod (31); the vertical connecting rod (33) is plugged into the horizontal connecting rod (32), and the fence-type push-pull mechanism (1) and the antenna tray (2) are respectively sleeved on the vertical connecting rod (33).

8. The mechanical adjustment device for antenna radiation pattern according to claim 7, characterized in that: The antenna tray (2) and the fence-type push-pull mechanism (1) can slide on the vertical connecting rod (33) of the bracket (3) to change the distance between the antenna and the mesh and adapt to different antenna operating frequencies.

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