Extensible dipole antenna

Abstract

The utility model relates to the technical field of antennas, and discloses an extensible dipole antenna, which comprises a fixed seat, the top end surface of the fixed seat is fixedly connected with a cylinder, the cylinder is hollow, and the inner wall of the cylinder is provided with a protection assembly. According to the extensible symmetrical dipole antenna, the dipole antenna body is gathered towards the axis of the vertical pipe in severe weather such as wind and rain, the windward area is reduced, the wind resistance is reduced, the damage risk caused by strong wind is reduced, the windproof sleeve moves upwards to shield the dipole antenna body, direct impact of wind on the antenna is avoided, the antenna structure is protected, and the service life of the dipole antenna is prolonged. The first shielding plate and the second shielding plate shield the top of the windproof sleeve, the rainwater is prevented from entering the windproof sleeve and the column body, the rainwater is prevented from entering the interior, electronic components and structures are protected against water erosion, the service life of equipment and elements is prolonged, accumulated snow is automatically removed, and overload caused by the accumulated snow is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and particularly to an expandable symmetrical dipole antenna. Background Art

[0002] Antenna gain testing usually tests the antenna gain through the comparison method. Among them, the antenna under test and the standard antenna receive the signal of the same transmitting antenna at the same frequency, compare their received values, and combine the known gain value of the standard antenna to determine the gain of the antenna under test at this frequency. In the communication antenna gain testing, the dipole antenna is often used as the standard antenna, and its length change corresponds to different frequencies. During the testing process, it is necessary to repeatedly adjust the antenna length, resulting in low efficiency. Therefore, it is necessary to simplify this process to improve the experimental efficiency.

[0003] According to the publicly announced dipole antenna (publication number: CN107623169A), the above application includes an antenna bottom rod and an antenna dipole. Among them, the antenna dipole is composed of multiple sections of antenna sub-dipoles. On each section of the antenna sub-dipole, frequency band scales are set according to the corresponding relationship between the antenna frequency and the length of the antenna dipole. The antenna dipole is fixedly installed on the antenna bottom rod, and the antenna dipole of different lengths can be adjusted according to the test needs.

[0004] However, the above antenna generally will not be randomly disassembled after erection. In bad weather, such as rain and strong wind, the dipole antenna may face signal loss or interference caused by rain accumulation, vibration and deviation caused by strong wind. These factors will seriously affect the performance and stability of the antenna. In view of this, we propose an expandable symmetrical dipole antenna. Summary of the Invention

[0005] The purpose of the present invention is to provide an expandable symmetrical dipole antenna to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An expandable symmetrical dipole antenna, including a fixed seat, the top end face of the fixed seat is fixedly connected with a column body, the column body is set to be hollow, and a protection component is arranged on the inner wall of the column body. The protection component includes:

[0007] A vertical riser pipe, the inner bottom surface of the column body is fixedly connected with a motor, the output end of the motor is fixedly connected with a threaded rod, and the output end of the threaded rod is threadedly connected with the vertical riser pipe;

[0008] A dipole antenna body, the side wall of the vertical riser pipe is hinged with a mounting seat, and the mounting seat is sleeved with the dipole antenna body;

[0009] Windshield sleeve, an inner wall of the column body is movably connected with a windshield sleeve, an inner wall of the windshield sleeve is fixedly connected with a guiding arc plate, an inner wall of the guiding windshield sleeve is fixedly connected with an elastic member, and one end of the elastic member away from the windshield sleeve is fixedly connected with an abutting plate;

[0010] Rolling wheel, an inner wall of the fixed seat is fixedly connected with a rotating shaft, and a rolling wheel is sleeved on a side wall of the rotating shaft;

[0011] First shielding plate, a top end face of the windshield sleeve is fixedly connected with a first shielding plate, and one end of the dipole antenna body away from the vertical riser is sleeved with a second shielding plate.

[0012] Preferably, a telescopic rod is fixedly connected to a side wall of the vertical riser, one end of the telescopic rod away from the vertical riser is fixedly connected with a support plate, a spring is sleeved on a side wall of the telescopic rod, one end of the spring abuts against the support plate, and the other end of the spring abuts against a threaded sleeve, and the threaded sleeve is threadedly connected to the side wall of the telescopic rod.

[0013] Preferably, a limiting rod is fixedly connected to a top end face of the motor, and the limiting rod is sleeved with the vertical riser.

[0014] Preferably, the number of the dipole antenna bodies is set to be several groups, several groups of the dipole antenna bodies are sleeved with each other, several groups of the dipole antenna bodies are symmetrically arranged on both sides of the vertical riser, the dipole antenna body is at a 90-degree angle to the vertical riser in the unfolded state, and the angle between the dipole antenna bodies on both sides is 180 degrees. Without changing the overall antenna, the antenna frequency is changed by adjusting the length of the dipole antenna body, so as to play the role of receiving and transmitting different signals.

[0015] Preferably, the vertical riser and the dipole antenna body are hollow, and a wire routing is arranged on inner walls of the vertical riser and the dipole antenna body, and the internal wire routing connects the whip antenna signal and the external monitoring device.

[0016] Preferably, a flat plate is fixedly connected to a side wall of the vertical riser, the flat plate is movably connected with the rolling wheel, and the rolling wheel is movably connected with the abutting plate.

[0017] Compared with the prior art, the present invention provides an expandable symmetric dipole antenna, which has the following beneficial effects:

[0018] 1. The expandable dipole antenna, through the provided windproof sleeve, mounting base, rolling wheels, baffle one, and baffle two, enables the dipole antenna body to converge towards the axis of the vertical riser under harsh weather conditions such as wind and rain, reducing the windward area, lowering wind resistance, and reducing the risk of damage caused by strong winds. The windproof sleeve moves upward to shield the dipole antenna body, preventing the direct impact of the wind on the antenna, protecting the antenna structure, and preventing the erosion of rainwater, dust, etc. on the antenna. Baffle one and baffle two shield the top of the windproof sleeve, preventing rainwater from entering the windproof sleeve and the column body, protecting the internal components and structure from moisture erosion, and extending the service life of the equipment and components.

[0019] 2. The expandable dipole antenna, through the provided telescopic rod, spring, and threaded sleeve, when snow accumulates on the dipole antenna body, the weight of the dipole antenna body is greater than the force that the telescopic rod can bear, allowing the dipole antenna body to rotate around the mounting base, causing the snow to slide down along the inclined plane, automatically removing the snow, avoiding overload caused by snow accumulation, preventing damage to the antenna due to excessive snow weight, and protecting the antenna and the support structure. Brief Description of the Drawings

[0020] Figure 1 Schematic diagram of the main structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of area A in

[0022] Figure 3 Schematic diagram of the sectional structure of the column body of the present invention;

[0023] Figure 4 Schematic diagram of the threaded rod structure of the present invention;

[0024] Figure 5 Exploded view of the windproof sleeve of the present invention;

[0025] Figure 6 Schematic diagram of the sectional structure of the windproof sleeve of the present invention.

[0026] In the figure: 1. Fixed seat; 2. Column body; 3. Motor; 4. Threaded rod; 5. Vertical riser; 6. Mounting base; 7. Dipole antenna body; 8. Windproof sleeve; 9. Guide arc plate; 10. Elastic member; 11. Contact plate; 12. Flat plate; 13. Rotating shaft; 14. Rolling wheels; 15. Telescopic rod; 16. Support plate; 17. Spring; 18. Threaded sleeve; 19. Limit rod; 20. Baffle one; 21. Baffle two. Detailed Description of the Invention

[0027] As Figures 1-6As shown in the figure, the present invention provides a technical solution: an expandable dipole antenna, including a fixed base 1, the top end face of the fixed base 1 is fixedly connected with a cylinder 2, the cylinder 2 is set to be hollow, and a protection component is arranged on the inner wall of the cylinder 2. The protection component includes a motor 3, a threaded rod 4, a vertical riser 5, a mounting seat 6, a dipole antenna body 7, a windproof sleeve 8, a guiding arc plate 9, an elastic member 10, a contact plate 11, a flat plate 12, a rotating shaft 13, a rolling wheel 14, a telescopic rod 15, a supporting plate 16, a spring 17, a threaded sleeve 18, a limiting rod 19, a shielding plate one 20, and a shielding plate two 21.

[0028] In an embodiment of the present invention, a motor 3 is fixedly connected to the inner bottom surface of the cylinder 2, the output end of the motor 3 is fixedly connected with a threaded rod 4, the output end of the threaded rod 4 is threadedly connected with a vertical riser 5, the top end face of the motor 3 is fixedly connected with a limiting rod 19, the limiting rod 19 is sleeved with the vertical riser 5, and the limiting rod 19 enables the vertical riser 5 to move only longitudinally. A mounting seat 6 is hinged to the side wall of the vertical riser 5, the mounting seat 6 is sleeved with the dipole antenna body 7, the number of the dipole antenna bodies 7 is set to be several groups, several groups of dipole antenna bodies 7 are sleeved with each other, several groups of dipole antenna bodies 7 are symmetrically arranged on both sides of the vertical riser 5. When the dipole antenna body 7 is in the unfolded state, it forms a 90-degree angle with the vertical riser 5, and the angle between the dipole antenna bodies 7 on both sides is 180 degrees. Without changing the overall antenna, by adjusting the length of the dipole antenna body 7, the antenna frequency can be changed to play the role of receiving and transmitting different signals. The vertical riser 5 and the dipole antenna body 7 are hollow, and there are wiring lines on the inner walls of the vertical riser 5 and the dipole antenna body 7, and the internal wiring connects the whip antenna signal and the external monitoring equipment.

[0029] A windproof sleeve 8 is movably connected to the inner wall of the cylinder 2, a guiding arc plate 9 is fixedly connected to the inner wall of the windproof sleeve 8, an elastic member 10 is fixedly connected to the inner wall of the guiding windproof sleeve 8, one end of the elastic member 10 far from the windproof sleeve 8 is fixedly connected with a contact plate 11, a rotating shaft 13 is fixedly connected to the inner wall of the fixed base 1, a rolling wheel 14 is sleeved on the side wall of the rotating shaft 13, a flat plate 12 is fixedly connected to the side wall of the vertical riser 5, the flat plate 12 is movably connected with the rolling wheel 14, the rolling wheel 14 is movably connected with the contact plate 11, a shielding plate one 20 is fixedly connected to the top end face of the windproof sleeve 8, a shielding plate two 21 is sleeved on the end of the dipole antenna body 7 far from the vertical riser 5, a telescopic rod 15 is fixedly connected to the side wall of the vertical riser 5, a supporting plate 16 is fixedly connected to the end of the telescopic rod 15 far from the vertical riser 5, a spring 17 is sleeved on the side wall of the telescopic rod 15, one end of the spring 17 abuts against the supporting plate 16, and the other end of the spring 17 abuts against a threaded sleeve 18, and the threaded sleeve 18 is threadedly connected with the side wall of the telescopic rod 15.

[0030] In bad weather such as wind and rain, the motor 3 starts, drives the threaded rod 4 to rotate, so that the vertical riser 5 moves downward. The dipole antenna body 7 abuts against the guiding arc plate 9, and then is pushed by the guiding arc plate 9 to rotate along the mounting seat 6, so that the dipole antenna body 7 converges towards the axis of the vertical riser 5, reducing the windward area, lowering the wind resistance, and reducing the risk of damage caused by strong winds.

[0031] The vertical riser 5 moves downward, which in turn drives the rolling wheel 14 to rotate. The rolling wheel 14 further pushes the abutting plate 11 and the guiding arc plate 9 to move upward, thereby pushing the windproof sleeve 8 to move upward. The windproof sleeve 8 shields the dipole antenna body 7, avoiding the direct impact of the wind on the antenna, protecting the antenna structure, and preventing the erosion of the antenna by rain, dust, etc.

[0032] After the dipole antenna body 7 converges, the first baffle 20 and the second baffle 21 shield the top of the windproof sleeve 8, preventing rainwater from entering the windproof sleeve 8 and the column body 2, protecting the electronic components and the structure from moisture erosion, and extending the service life of the equipment and components.

[0033] In addition, a telescopic rod 15 is fixedly connected to the side wall of the vertical riser 5. One end of the telescopic rod 15 far from the vertical riser 5 is fixedly connected with a support plate 16. A spring 17 is sleeved on the side wall of the telescopic rod 15. One end of the spring 17 abuts against the support plate 16, and the other end of the spring 17 abuts against a threaded sleeve 18. The threaded sleeve 18 is threadedly connected to the side wall of the telescopic rod 15. By rotating the threaded sleeve 18, a pre-pressure is applied to the spring 17, so that the telescopic rod 15 has exactly the force required to support different numbers of dipole antenna bodies 7. When it snows, after snow accumulates on the dipole antenna body 7, the weight of the dipole antenna body 7 is greater than the force that the telescopic rod 15 can bear, and the dipole antenna body 7 can rotate around the mounting seat 6, so that the snow slides down along the inclined plane, automatically removing the snow, avoiding overload caused by snow accumulation, and preventing the antenna from being damaged due to excessive snow weight, protecting the antenna and the support structure.

[0034] It should be noted that the fixed seat 1 is processed from aluminum alloy material and is surface conductive oxidized. It can be designed according to the actual requirements of the antenna platform. The vertical riser 5 is processed from fiberglass pipe. The dipole antenna body 7 is processed from non-metallic material to avoid the influence of metal materials on the antenna signal. The dipole antenna bodies 7 are connected, locked and fixed by male-female head structures. The whole antenna is designed with a non-metallic material structure to avoid the influence of metal materials on the antenna signal. The outer surface is sprayed with military green (GY06) A04-81.Ⅱ.E, which is implemented according to GSB05-1426-2001. The outer surface uses fluorocarbon paint to have strong light and weather resistance. The coating system consists of primer, rain erosion resistant paint and anti-static paint, meeting the use requirements.

[0035] In the present invention, during use, the motor 3 is started to drive the threaded rod 4 to rotate, causing the vertical riser pipe 5 to move downward. The dipole antenna body 7 is pushed by the guiding arc plate 9 to rotate along the mounting base 6, causing the dipole antenna body 7 to converge towards the axis of the vertical riser pipe 5. As the vertical riser pipe 5 moves downward, it drives the rolling wheel 14 to rotate, and the rolling wheel 14 further pushes the abutting plate 11 and the guiding arc plate 9 to move upward, pushing the windproof sleeve 8 upward. The windproof sleeve 8 shields the dipole antenna body 7, and the first baffle plate 20 and the second baffle plate 21 shield the top of the windproof sleeve 8. Further, after snow accumulates on the dipole antenna body 7, the weight of the dipole antenna body 7 is greater than the force that the telescopic rod 15 can bear, and the dipole antenna body 7 can rotate around the mounting base 6, causing the snow to slide down along the inclined plane.

[0036] The above has generally described the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An expandable symmetrical array antenna, comprising a fixing base (1), a top end surface of the fixing base (1) being fixedly connected to a column (2), characterized in that: The column (2) is arranged to be hollow, and the inner wall of the column (2) is provided with a protective component, and the protective component comprises: A vertical riser (5), the inner bottom surface of the column (2) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to a threaded rod (4), and the output end of the threaded rod (4) is threadedly connected to the vertical riser (5); An array antenna body (7), the side wall of the vertical riser (5) is hinged with a mounting seat (6), and the mounting seat (6) is sleeved with the array antenna body (7); A windproof sleeve (8), wherein the inner wall of the column (2) is movably connected to the windproof sleeve (8), the inner wall of the windproof sleeve (8) is fixedly connected to a guide arc plate (9), the inner wall of the guide windproof sleeve (8) is fixedly connected to an elastic member (10), and one end of the elastic member (10) away from the windproof sleeve (8) is fixedly connected to an abutment plate (11); A rolling wheel (14), wherein the inner wall of the fixed seat (1) is fixedly connected to a rotating shaft (13), and the side wall of the rotating shaft (13) is sleeved with the rolling wheel (14); A shielding plate (20) is fixedly connected to the top end surface of the windproof sleeve (8), and a shielding plate (21) is sleeved on one end of the array antenna body (7) away from the vertical riser (5).

2. The expandable symmetrical array antenna according to claim 1, characterized in that: A telescopic rod (15) is fixedly connected to the side wall of the vertical stand pipe (5); one end of the telescopic rod (15) away from the vertical stand pipe (5) is fixedly connected to a support plate (16); a spring (17) is sleeved on the side wall of the telescopic rod (15); one end of the spring (17) abuts against the support plate (16); the other end of the spring (17) abuts against a threaded sleeve (18); and the threaded sleeve (18) is threadedly connected to the side wall of the telescopic rod (15).

3. The expandable symmetrical array antenna according to claim 1, characterized in that: The top end surface of the motor (3) is fixedly connected to a limit rod (19), and the limit rod (19) is sleeved with the vertical riser (5).

4. The expandable symmetrical array antenna according to claim 1, characterized in that: The number of the array antenna bodies (7) is arranged in a plurality of groups, the plurality of groups of the array antenna bodies (7) are mutually sleeved, and the plurality of groups of the array antenna bodies (7) are symmetrically arranged on both sides of the vertical riser (5).

5. The expandable symmetrical array antenna according to claim 1, characterized in that: The vertical riser (5) and the array antenna body (7) are hollow, and wiring is arranged on the inner walls of the vertical riser (5) and the array antenna body (7).

6. The expandable symmetrical array antenna according to claim 1, characterized in that: A flat plate (12) is fixedly connected to the side wall of the vertical riser (5); the flat plate (12) is movably connected to a rolling wheel (14); and the rolling wheel (14) is movably connected to a contact plate (11).

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