Electric linear polarization and circular polarization switching device

Abstract

The utility model belongs to the technical field of antennas, and discloses an electric linear polarization and circular polarization switching device, which comprises a first narrow-band sleeve switching block, a second narrow-band sleeve switching block, a circular polarizer, a rectangular-circular transition waveguide, a first rotating mechanism and a second rotating mechanism, the first narrow-band sleeve switching block is rotationally connected with the circular polarizer, the second narrow-band sleeve switching block is rotationally connected with the rectangular-circular transition waveguide, the circular polarizer is rotationally connected with the rectangular-circular transition waveguide, the first rotating mechanism is used for driving the circular polarizer to rotate, and the second rotating mechanism is used for driving the rectangular-circular transition waveguide to rotate. According to the utility model, electric linear polarization and circular polarization switching is realized, electric control of horizontal linear polarization and vertical linear polarization and control of circular polarization left-handed rotation and right-handed rotation can be satisfied at the same time, and the antenna can track various satellites without manual feed switching.

Description

Technical Field

[0001] This utility model belongs to the field of antenna technology, specifically relating to an electric linear polarization-circular polarization switching device. Background Technology

[0002] Antenna polarization is the spatial orientation of the electric field intensity vector in the direction of maximum electromagnetic wave radiation of an antenna. Linear polarization and circular polarization are two forms of antenna polarization. The electric field vector of a linearly polarized antenna vibrates back and forth along a straight line in space, while the electromagnetic waves of a circularly polarized antenna propagate along a spiral path and have a multi-directional electromagnetic field.

[0003] Most automatic portable antennas on the market today are controlled separately for linear or circular polarization and require manual switching, which cannot meet the need for simultaneous electric control of linear and circular polarization. Utility Model Content

[0004] The purpose of this invention is to provide an electric linear polarization-circular polarization switching device that can achieve simultaneous electric control of linear polarization and circular polarization.

[0005] The technical solution adopted by this utility model is an electric linear polarization-circular polarization switching device, including a first narrow-frequency sleeve adapter block, a second narrow-frequency sleeve adapter block, a circular polarizer, a rectangular-circular transition waveguide, a first rotating mechanism, and a second rotating mechanism. The first narrow-frequency sleeve adapter block and the second narrow-frequency sleeve adapter block are arranged opposite to each other. The first narrow-frequency sleeve adapter block is rotatably connected to the circular polarizer, and the second narrow-frequency sleeve adapter block is rotatably connected to the rectangular-circular transition waveguide. The circular polarizer is rotatably connected to the rectangular-circular transition waveguide. The first rotating mechanism is used to drive the circular polarizer to rotate, and the second rotating mechanism is used to drive the rectangular-circular transition waveguide to rotate.

[0006] Preferably, the first rotating mechanism includes a first motor, a first cylindrical gear, a second cylindrical gear, and a first rotating joint. The output shaft of the first motor is connected to the first cylindrical gear in a transmission connection. The first cylindrical gear is meshed with the second cylindrical gear. The second cylindrical gear is fixedly connected to the first rotating joint. The two ends of the first rotating joint are fixedly connected to the circular polarizer and the first narrow-frequency sleeve adapter block, respectively.

[0007] Preferably, the first rotary joint includes a lower rotary part and an upper rotary part, one end of the lower rotary part is rotatably connected to the upper rotary part, and the other end is fixedly connected to the circular polarizer, and the upper rotary part is fixedly connected to the first narrow-frequency sleeve adapter block.

[0008] Preferably, sealing rings are provided between the upper rotating part and the first narrow-frequency sleeve adapter block, and between the lower rotating part and the circular polarizer.

[0009] Preferably, the first rotating mechanism further includes a first polarized gear fixing sleeve, which is fixed on the lower rotating part and is fixedly connected to the second cylindrical gear.

[0010] Preferably, the second rotating mechanism includes a second motor, a third cylindrical gear, a fourth cylindrical gear, and a second rotating joint. The output shaft of the second motor is connected to the third cylindrical gear for transmission. The third cylindrical gear is meshed with the fourth cylindrical gear. The fourth cylindrical gear is fixedly connected to the second rotating joint. The two ends of the second rotating joint are fixedly connected to the rectangular-circular transition waveguide and the second narrow-frequency sleeve adapter block, respectively.

[0011] Preferably, the second rotary joint includes a rotating part and a fixed part, one end of the rotating part is rotatably connected to the fixed part, and the other end is fixedly connected to the rectangular-circular transition waveguide, and the fixed part is fixedly connected to the second narrow-frequency sleeve adapter block.

[0012] Preferably, a sealing ring is provided between the rotating part and the rectangular transition waveguide, and between the fixed part and the second narrow-frequency sleeve adapter block.

[0013] Preferably, the second rotating mechanism further includes a second polarized gear fixing sleeve, which is fixedly sleeved on the rotating part and is fixedly connected to the fourth cylindrical gear by screws.

[0014] Preferably, a third rotary joint is provided between the circular polarizer and the rectangular-circular transition waveguide, and the two ends of the third rotary joint are fixedly connected to the circular polarizer and the rectangular-circular transition waveguide, respectively.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model controls the rotation of the circular polarizer through a first rotating mechanism and controls the rotation of the rectangular-circular transition waveguide through a second rotating mechanism, thereby realizing the switching between electric linear polarization and circular polarization. It can simultaneously satisfy the electric control of horizontal and vertical linear polarization as well as the control of left and right rotation of circular polarization.

[0017] 2. This invention can switch between vertical and horizontal polarization while also switching between left-hand and right-hand circular polarization, thus enabling the antenna to track multiple satellites without manual feed switching. Attached Figure Description

[0018] Figure 1 This is a half-sectional structural diagram of the electric linear polarization-circular polarization switching device of this utility model.

[0019] Figure 2This is a schematic diagram of the planar structure of the electric linear polarization-circular polarization switching device of this utility model.

[0020] Figure 3 for Figure 2 Schematic diagram of the structure at point AA.

[0021] Figure 4 for Figure 2 Schematic diagram of the structure at point BB.

[0022] Reference numerals: 1. First narrow-frequency sleeve adapter block; 2. Second narrow-frequency sleeve adapter block; 3. Circular polarizer; 4. Rectangular-circular transition waveguide; 5. First rotating mechanism; 51. First motor; 52. First cylindrical gear; 53. Second cylindrical gear; 54. Lower rotating part; 55. Upper rotating part; 56. First polarized gear fixing sleeve; 6. Second rotating mechanism; 61. Second motor; 62. Third cylindrical gear; 63. Fourth cylindrical gear; 64. Rotating part; 65. Fixing part; 66. Second polarized gear fixing sleeve; 7. Sealing ring; 8. Third rotating joint. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, the electric linear-to-circular polarization switching device of this utility model includes a first narrow-frequency sleeve adapter block 1, a second narrow-frequency sleeve adapter block 2, a circular polarizer 3, a rectangular-to-circular transition waveguide 4, a first rotating mechanism 5, and a second rotating mechanism 6. The first narrow-frequency sleeve adapter block 1 and the second narrow-frequency sleeve adapter block 2 are arranged opposite to each other. The first narrow-frequency sleeve adapter block 1 is rotatably connected to the circular polarizer 3, and the second narrow-frequency sleeve adapter block 2 is rotatably connected to the rectangular-to-circular transition waveguide 4. The circular polarizer 3 is rotatably connected to the rectangular-to-circular transition waveguide 4. The first rotating mechanism 5 is used to drive the circular polarizer 3 to rotate, and the second rotating mechanism 6 is used to drive the rectangular-to-circular transition waveguide 4 to rotate.

[0026] Example 2

[0027] Based on Example 1, such as Figure 3 As shown, in this embodiment, the first rotating mechanism 5 includes a first motor 51, a first cylindrical gear 52, a second cylindrical gear 53, and a first rotating joint. The output shaft of the first motor 51 is connected to the first cylindrical gear 52 for transmission. The first cylindrical gear 52 is meshed with the second cylindrical gear 53. The second cylindrical gear 53 is fixedly connected to the first rotating joint. The two ends of the first rotating joint are fixedly connected to the circular polarizer 3 and the first narrow-frequency sleeve adapter block 1, respectively.

[0028] The first rotary joint includes a lower rotary part 54 and an upper rotary part 55. One end of the lower rotary part 54 is rotatably connected to the upper rotary part 55, and the other end is fixedly connected to the circular polarizer 3. The upper rotary part 55 is fixedly connected to the first narrow-frequency sleeve adapter block 1.

[0029] A sealing ring 7 is provided between the upper rotating part 55 and the first narrow frequency sleeve adapter block 1, and between the lower rotating part 54 and the circular polarizer 3. The sealing ring 7 makes the connection more secure and prevents hard friction due to poor contact.

[0030] The first rotating mechanism 5 also includes a first polarized gear fixing sleeve 56, which is fixedly mounted on the lower rotating part 54. The first polarized gear fixing sleeve 56 is fixedly connected to the second cylindrical gear 53 by screws. Multiple screws are arranged in a circumferential array, and four are arranged in this embodiment.

[0031] It should be noted that the first rotating joint is existing technology. A rotating joint is a device in the field of radar antennas that enables energy transmission in a rotating state.

[0032] During operation, the output shaft of the first motor 51 drives the first cylindrical gear 52 to rotate, the first cylindrical gear 52 drives the second cylindrical gear 53 to rotate, and the second cylindrical gear 53 drives the circular polarizer 3 to rotate. The stability and accuracy of the rotation of the circular polarizer 3 can be ensured by the first motor 51, the first cylindrical gear 52, the second cylindrical gear 53, the first rotary joint, and the first polarization gear fixing sleeve 56.

[0033] Example 3

[0034] Based on Example 1, in this example, as Figure 3 As shown, the second rotating mechanism 6 includes a second motor 61, a third cylindrical gear 62, a fourth cylindrical gear 63, and a second rotating joint. The output shaft of the second motor 61 is connected to the third cylindrical gear 62 for transmission. The third cylindrical gear 62 is meshed with the fourth cylindrical gear 63. The fourth cylindrical gear 63 is fixedly connected to the second rotating joint. The two ends of the second rotating joint are fixedly connected to the rectangular-circular transition waveguide 4 and the second narrow-frequency sleeve adapter block 2, respectively.

[0035] The second rotary joint includes a rotating part 64 and a fixed part 65. One end of the rotating part 64 is rotatably connected to the fixed part 65, and the other end is fixedly connected to the rectangular-circular transition waveguide 4. The fixed part 65 is fixedly connected to the second narrow-frequency sleeve adapter block 2.

[0036] A sealing ring 7 is provided between the rotating part 64 and the rectangular transition waveguide 4, and between the fixed part 65 and the second narrow frequency sleeve adapter block 2. The sealing ring 7 makes the connection more secure and prevents hard friction due to poor contact.

[0037] like Figure 4 As shown, the second rotating mechanism 6 also includes a second polarized gear fixing sleeve 66, which is fixedly sleeved on the rotating part 64. The second polarized gear fixing sleeve 66 is fixedly connected to the fourth cylindrical gear 63 by screws, and multiple screws are arranged in a circumferential array.

[0038] The second rotary joint adopts a Ka-I type rotary joint. The Ka-I type rotary joint is an existing technology, which refers to a rotary joint in which the two ports of the Ka band are collinear, i.e., a linear joint.

[0039] The rectangular-circular transition waveguide 4 adopts a ka narrow-frequency feed rectangular-circular transition waveguide, which is an existing technology.

[0040] During operation, the output shaft of the second motor 61 drives the third cylindrical gear 62 to rotate, the third cylindrical gear 62 drives the fourth cylindrical gear 63 to rotate, and the fourth cylindrical gear 63 drives the rectangular-circular transition waveguide 4 to rotate. The stability and accuracy of the rotation of the circular polarizer 3 can be ensured by the second motor 61, the third cylindrical gear 62, the fourth cylindrical gear 63, the second rotary joint, and the second polarization gear fixing sleeve 66.

[0041] Example 4

[0042] Based on Embodiment 1, in this embodiment, a third rotary joint 8 is provided between the circular polarizer 3 and the rectangular-circular transition waveguide 4, with both ends of the third rotary joint fixedly connected to the circular polarizer 3 and the rectangular-circular transition waveguide 4, respectively. The third rotary joint 8 enables the circular polarizer 3 or the rectangular-circular transition waveguide 4 to rotate individually, as well as the circular polarizer 3 and the rectangular-circular transition waveguide 4 to rotate simultaneously.

[0043] Example 5

[0044] This embodiment provides the working principle of this utility model:

[0045] First, it should be noted that the initial 0° position of the circular polarizer 3 of this utility model is the horizontal polarization position, and the ±90° position is the vertical polarization position based on the 0° position; the +45° position is the left-hand circular polarization, and the -45° position is the right-hand circular polarization.

[0046] 1) The horizontal and vertical polarization switching process of this utility model: The first motor 51 and the second motor 61 are controlled to move synchronously in opposite directions, with a range of ±90°. The first motor 51 drives the first cylindrical gear 52 to rotate, the first cylindrical gear 52 drives the second cylindrical gear 53 to rotate, and the second cylindrical gear 53 drives the first polarization gear fixing sleeve 56 to rotate, thereby driving the circular polarizer 3 to rotate. The output shaft of the second motor 61 drives the third cylindrical gear 62 to rotate, the third cylindrical gear 62 drives the fourth cylindrical gear 63 to rotate, and the fourth cylindrical gear 63 drives the second polarization gear fixing sleeve 66 to rotate, thereby realizing the rotation of the rectangular-circular transition waveguide 4. Finally, after the circular polarizer 3 and the rectangular-circular transition waveguide 4 rotate synchronously in opposite directions by 90°, the horizontal and vertical polarization switching process is completed.

[0047] 2) The linear polarization and circular polarization switching process of this utility model: The first motor 51 is stationary, controlling the second motor 61 to rotate. The output shaft of the second motor 61 drives the third cylindrical gear 62 to rotate. The third cylindrical gear 62 drives the fourth cylindrical gear 63 to rotate. The fourth cylindrical gear 63 drives the second polarization gear fixing sleeve 66 to rotate, thereby realizing the rotation of the rectangular-circular transition waveguide 4. Specifically, relative to the initial 0° position, when the second motor 61 rotates +45°, it switches to left-hand circular polarization, and when the second motor 61 rotates -45°, it switches to right-hand circular polarization.

[0048] Components and structures not described in detail in the embodiments are well-known components, common structures or common means in the industry, and will not be described in detail here.

Claims

1. An electric linear-to-circular polarization switching device, characterized in that, The device includes a first narrow-frequency sleeve adapter block (1), a second narrow-frequency sleeve adapter block (2), a circular polarizer (3), a rectangular-circular transition waveguide (4), a first rotating mechanism (5), and a second rotating mechanism (6). The first narrow-frequency sleeve adapter block (1) and the second narrow-frequency sleeve adapter block (2) are arranged opposite to each other. The first narrow-frequency sleeve adapter block (1) is rotatably connected to the circular polarizer (3). The second narrow-frequency sleeve adapter block (2) is rotatably connected to the rectangular-circular transition waveguide (4). The circular polarizer (3) is rotatably connected to the rectangular-circular transition waveguide (4). The first rotating mechanism (5) is used to drive the circular polarizer (3) to rotate. The second rotating mechanism (6) is used to drive the rectangular-circular transition waveguide (4) to rotate.

2. The electric linear polarization-circular polarization switching device according to claim 1, characterized in that, The first rotating mechanism (5) includes a first motor (51), a first cylindrical gear (52), a second cylindrical gear (53), and a first rotating joint. The output shaft of the first motor (51) is connected to the first cylindrical gear (52) for transmission. The first cylindrical gear (52) is meshed with the second cylindrical gear (53). The second cylindrical gear (53) is fixedly connected to the first rotating joint. The two ends of the first rotating joint are fixedly connected to the circular polarizer (3) and the first narrow-frequency sleeve adapter block (1), respectively.

3. The electric linear-polarization-circular-polarization switching device according to claim 2, characterized in that, The first rotary joint includes a lower rotary part (54) and an upper rotary part (55). One end of the lower rotary part (54) is rotatably connected to the upper rotary part (55), and the other end is fixedly connected to the circular polarizer (3). The upper rotary part (55) is fixedly connected to the first narrow-frequency sleeve adapter block (1).

4. The electric linear-polarization-circular-polarization switching device according to claim 3, characterized in that, A sealing ring (7) is provided between the upper rotating part (55) and the first narrow frequency sleeve adapter block (1), and between the lower rotating part (54) and the circular polarizer (3).

5. The electric linear polarization-circular polarization switching device according to claim 2, characterized in that, The first rotating mechanism (5) further includes a first polarized gear fixing sleeve (56), which is fixedly mounted on the lower rotating part (54) and is fixedly connected to the second cylindrical gear (53).

6. The electric linear-polarization-circular-polarization switching device according to claim 1, characterized in that, The second rotating mechanism (6) includes a second motor (61), a third cylindrical gear (62), a fourth cylindrical gear (63), and a second rotating joint. The output shaft of the second motor (61) is connected to the third cylindrical gear (62) for transmission. The third cylindrical gear (62) is meshed with the fourth cylindrical gear (63). The fourth cylindrical gear (63) is fixedly connected to the second rotating joint. The two ends of the second rotating joint are fixedly connected to the rectangular circular transition waveguide (4) and the second narrow-frequency sleeve adapter block (2), respectively.

7. The electric linear-polarization-circular-polarization switching device according to claim 6, characterized in that, The second rotary joint includes a rotating part (64) and a fixed part (65). One end of the rotating part (64) is rotatably connected to the fixed part (65), and the other end is fixedly connected to the rectangular-circular transition waveguide (4). The fixed part (65) is fixedly connected to the second narrow-frequency sleeve adapter block (2).

8. The electric linear-polarization-circular-polarization switching device according to claim 7, characterized in that, A sealing ring (7) is provided between the rotating part (64) and the rectangular transition waveguide (4), and between the fixed part (65) and the second narrow-frequency sleeve adapter block (2).

9. The electric linear polarization-circular polarization switching device according to claim 7, characterized in that, The second rotating mechanism (6) further includes a second polarized gear fixing sleeve (66), which is fixedly sleeved on the rotating part (64) and is fixedly connected to the fourth cylindrical gear (63) by screws.

10. The electric linear-polarization-circular-polarization switching device according to any one of claims 1-9, characterized in that, A third rotary joint (8) is provided between the circular polarizer (3) and the rectangular-circular transition waveguide (4), and the two ends of the third rotary joint (8) are fixedly connected to the circular polarizer (3) and the rectangular-circular transition waveguide (4) respectively.

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