Multi-feed multimode antenna convenient to erect

Abstract

The utility model discloses a multi-feed multi-mode antenna convenient to erect. The multi-feed multi-mode antenna convenient to erect comprises a central mast, a multimode device, a multimode device cage, a cross brace and an oscillator. A multi-mode device cage is arranged on the central mast and used for containing a multi-mode device, transverse support fixing supporting lugs are arranged on the outer walls of the masts, and transverse supports are connected to the transverse support fixing supporting lugs in a hinged mode. The transverse support fixing support lug is provided with a transverse support mounting hole and a transverse support fixing hole, and the transverse support is firstly folded to be close to the mast through the mounting hole when the antenna is erected, and avoids a multimode device and a multimode device cage, so that mounting personnel can conveniently fix an oscillator; after the oscillator is installed, the transverse support is moved from the installation hole to the fixing hole to be unfolded and fixed, so that the antenna forms a stable umbrella-shaped structure. By means of the design, interference between the cross brace and the multimode device can be effectively avoided, the risk that the cross brace is broken is reduced, erecting steps are simplified, installation efficiency and reliability are improved, meanwhile, the overall stability is enhanced through cooperation of a lightweight structure and the pull rope, and the advantages of being reasonable in structure, convenient to operate and high in adaptability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of antenna installation technology, specifically to a multi-feed multimode antenna that is easy to install. Background Technology

[0002] A multi-feed multimode antenna is an antenna that achieves high-performance radiation characteristics by exciting different modes (or different states of the same mode) through multiple feed ports. By using multiple feed ports to excite the antenna, the amplitude and phase of different ports can be controlled independently, thereby improving the antenna's operational flexibility and radiation performance.

[0003] In the shortwave band, common multi-feed multimode antennas typically have an aperture of up to 18 meters and a height of about 15 meters, with an overall structure resembling a vertically inverted umbrella. These antennas usually consist of 6 cross braces (umbrella ribs) and several vibrators spirally wound around the central mast, commonly 4. The vibrators are fixed to the cross braces according to their positions, making the antenna as a whole resemble an inverted cone.

[0004] During the installation of this type of antenna, the cross brace (umbrella ribs) is typically hinged to the central mast first. Then, the cross brace is folded up to a position close to the central mast, and the installers fix the vibrators onto the cross brace one by one from top to bottom. After the vibrators are fixed, the cross brace is unfolded, causing the antenna to open in an umbrella shape, thus completing the overall installation.

[0005] Multi-feed multimode antennas typically include a multimode converter. For shortwave antennas, the multimode converter is usually quite large, with a diameter of around 300mm. It is generally housed in the central mast inside the antenna. Due to its large size, interference can easily occur during antenna installation when the cross braces are retracted inwards. This can prevent the cross braces from being pulled smoothly, or even cause them to break, severely impacting the antenna's installation efficiency and structural reliability. Therefore, there is an urgent need for improved technologies to address these issues. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the existing defects and provide a convenient multi-feed multi-mode antenna. By setting a cross brace mounting position and a cross brace fixing position on the central mast, the cross brace is fixed in the cross brace mounting position during erection. After the cross brace is opened, it is moved to the cross brace fixing position, and the antenna erection is completed. This can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a conveniently erected multi-feed multimode antenna, comprising a central mast, a multimode unit, a multimode unit cage, a cross brace, and a vibrator. The multimode unit cage is mounted on the central mast, and the multimode unit is placed inside the cage. A cross brace fixing lug is provided circumferentially on the central mast, located below the multimode unit cage. The cross brace is hinged to the cross brace fixing lug, and the cross brace fixing lug has a cross brace mounting hole and a cross brace fixing hole, with the mounting hole located outside the fixing hole. The cross brace is hinged through the mounting hole and retracts towards the central mast. The cross brace moves from the mounting hole to the fixing hole and is fixed, thereby unfolding the cross brace.

[0008] Specifically, during antenna installation, the cross brace is first hinged through the cross brace mounting hole and retracted to the vicinity of the central mast, so that the cross brace can avoid the multimode unit and the multimode unit cage, and is placed vertically for the installation of the vibrator; after the vibrator is installed, the cross brace is moved from the cross brace mounting hole to the cross brace fixing hole and fixed, thereby unfolding the cross brace and completing the antenna installation.

[0009] The oscillator is spirally wound, evenly distributed on the central mast, and unfolds in an inverted cone shape; this structure is a conventional technology.

[0010] Furthermore, the cross brace fixing lug is integrally welded or cast onto the central mast, and a groove is provided on the cross brace fixing lug. The groove is located between the cross brace mounting hole and the cross brace fixing hole. The groove provides space for the cross brace to unfold, making the structure compact, and also restricts the rotation of the cross brace at the position of the cross brace fixing hole.

[0011] Furthermore, the cross brace is made of a lightweight alloy material.

[0012] Furthermore, the cross brace is connected to the cross brace mounting hole or the cross brace fixing hole via a pin, shaft, or quick-release structure.

[0013] Furthermore, a pull rope is fitted between the cross brace and the lower fixing surface of the antenna. After the pull rope is fixed, the antenna installation is completed.

[0014] Furthermore, a mast base is provided at the lower end of the central mast, which is fixed to the ground to support the central mast; the central mast adopts a segmented structure, and the segments of the central mast are connected by flanges.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model provides a cross brace fixing lug on the central mast, with cross brace mounting holes and cross brace fixing holes on it. This allows the cross brace to be retracted to the mounting hole position to avoid the multimode unit and multimode unit cage during the erection process, and then moved to the fixing hole position to unfold. This structure effectively solves the problem of interference between the cross brace and the multimode unit during the existing antenna erection process, avoids the risk of the cross brace not being able to be pulled smoothly or even breaking, and fundamentally improves the safety and reliability of the antenna installation process.

[0017] 2. After the vibrator is installed, the cross brace is moved to the fixing hole and unfolded to form an umbrella-shaped structure. This process is simple and convenient, which significantly shortens the erection time, reduces the dependence on the number of operators and their experience, and improves the overall efficiency of antenna erection.

[0018] 3. This utility model also has the advantages of lightweight and stability in structural design; the cross brace fixing lugs can be integrally formed with the central mast by welding or casting, and grooves are set in between to provide space for the cross brace to unfold, while restricting the rotation of the cross brace at the fixing hole position, thereby further improving the stability of the structure; with the support of the bottom mast base and the fixation of the rope, the antenna can maintain good wind resistance and long-term stability after the antenna is erected. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the cross brace fixing lug and the cross brace of this utility model;

[0021] Figure 3 This is a partial structural diagram of the central mast of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the central mast of this utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the cross braces of this utility model;

[0024] Figure 6 This is a schematic diagram of the cross brace retraction structure of this utility model;

[0025] Figure 7 This is an enlarged structural diagram of point A in this utility model.

[0026] In the diagram: 1. Multimode cage, 2. Central mast, 3. Cross brace, 4. Vibrator, 5. Cross brace fixing lug, 6. Mast base, 7. Multimode, 8. Flange, 9. Cross brace fixing hole, 10. Groove, 11. Cross brace mounting hole, 12. Pull rope. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Please see Figure 1-7 This utility model provides a technical solution: a conveniently erected multi-feed multi-mode antenna, including a central mast 2, a multimode unit 7, a multimode unit cage 1, a cross brace 3, and a vibrator 4; the central mast 2 is provided with the multimode unit cage 1, the multimode unit 7 is placed inside the multimode unit cage 1, the central mast 2 is provided with a cross brace fixing lug 5 in the circumferential direction, the cross brace fixing lug 5 is located below the multimode unit cage 1, and the cross brace 3 is connected to the cross brace fixing lug 5 by a hinge; the cross brace fixing lug 5 is provided with a cross brace mounting hole 11 and a cross brace fixing hole 9, the cross brace mounting hole 11 is located outside the cross brace fixing hole 9; During antenna installation, the support 3 is first hinged and retracted to the vicinity of the central mast 2 through the cross brace mounting hole 11, so that the cross brace 3 can avoid the multimode unit 7 and the multimode unit cage 1, and is placed vertically for the installation of the vibrator 4; after the vibrator 4 is installed, the cross brace 3 is moved from the cross brace mounting hole 11 to the cross brace fixing hole 9 and fixed, thereby unfolding the cross brace 3 and completing the antenna installation; the vibrator 4 is spirally wound, evenly distributed on the central mast 2, and unfolded in an inverted cone shape; this structure can effectively avoid interference between the cross brace and the multimode unit, ensure a smooth installation process, and improve the overall stability and wind resistance of the antenna.

[0029] In one possible implementation, the cross brace fixing lug 5 is integrally welded or cast onto the central mast 2. The cross brace fixing lug 5 is provided with a groove 10, which is located between the cross brace mounting hole 11 and the cross brace fixing hole 9, providing space for the cross brace 3 to unfold, making the overall structure more compact. At the same time, the groove 10 restricts the rotation of the cross brace 3, keeping the cross brace 3 stable after it is in the position of the fixing hole 9, further improving the reliability after the antenna is erected.

[0030] In one possible implementation, the cross brace 3 is made of a lightweight alloy material, such as aluminum alloy or magnesium alloy; while ensuring sufficient strength and rigidity, the weight of the cross brace 3 is significantly reduced, thereby reducing the load pressure on the central mast 2, improving the convenience of overall transportation and erection, and enhancing the antenna's corrosion resistance and durability.

[0031] In one possible implementation, the cross brace 3 is connected to the cross brace mounting hole 11 or the cross brace fixing hole 9 via a pin, shaft, or quick-release mechanism. With this structure, the cross brace 3 can be quickly switched between the mounting hole 11 and the fixing hole 9 and remain stable after positioning. Operators can complete the deployment and fixing of the cross brace without complicated tools, which greatly improves the erection efficiency and reliability.

[0032] In one possible implementation, a pull rope 12 is fitted between the cross brace 3 and the fixed surface at the lower end of the antenna; after the cross brace 3 is unfolded, it is connected to the ground or a fixed point by the pull rope 12, so that the cross brace 3 forms a tension support structure; after the pull rope 12 is fixed, it can effectively distribute the force on the cross brace 3 and the central mast 2, improve the overall stability and wind resistance, and enable the antenna to work stably for a long time.

[0033] In one possible implementation, a mast base 6 is provided at the lower end of the central mast 2. The mast base 6 is fixed to the ground to support the central mast 2. The central mast 2 adopts a segmented structure, and the segments are connected by flanges 8. This design facilitates transportation and on-site assembly, avoiding the handling difficulties caused by excessive length of a single mast. Through bolt fastening of the flanges 8, each segment can be reliably connected, ensuring the overall strength and stability of the mast.

[0034] In summary, this utility model effectively solves the problem of interference between the cross brace and the multimode device in the prior art by setting a multimode device cage, cross brace fixing lugs, cross brace mounting holes, and cross brace fixing holes on the central mast. This allows the cross brace to be retracted to avoid the multimode device during the erection process, and then unfolded and fixed after the vibrator installation is completed. At the same time, the combination of groove structure, lightweight cross brace material, quick connection method, rope reinforcement, and segmented mast design further improves the convenience, stability, and reliability of antenna erection.

[0035] Working principle: During the antenna erection process, the cross brace 3 is first hinged to the cross brace fixing lug 5 on the central mast 2 through the cross brace mounting hole 11, and then retracts to the central mast 2 to a vertical state; at this time, the cross brace 3 can avoid the multimode device 7 and multimode device cage 1 located inside the central mast 2, providing sufficient operating space for the installers; the installers fix the vibrator 4 on the cross brace 3 in sequence, so that the vibrator 4 is spirally wound along the central mast 2, gradually forming an inverted conical radiation structure.

[0036] After the vibrator 4 is installed, the cross brace 3 is moved from the cross brace mounting hole 11 to the cross brace fixing hole 9 and fixed by a pin or shaft. The cross brace 3 then unfolds from the vertical state to a preset angle, forming an umbrella-shaped distribution, and is fixed in conjunction with the pull rope 12, thereby ensuring the overall stability of the antenna after it is erected. When the antenna is put into use, the multimode unit 7 performs mode synthesis and distribution on the signals of multiple feed ports, and radiates them through the vibrator 4 to realize the multimode operation characteristics of shortwave communication, ensuring the wideband coverage capability and high-efficiency radiation performance of the antenna.

[0037] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A conveniently erected multi-feed multimode antenna, comprising a central mast (2), a multimode unit (7), a multimode unit cage (1), a cross brace (3), and a vibrator (4), characterized in that: A multi-mode cage (1) is provided on the central mast (2), and the multi-mode device (7) is placed in the multi-mode cage (1). A cross brace fixing lug (5) is provided in the circumferential direction of the central mast (2). The cross brace fixing lug (5) is located below the multi-mode cage (1). The cross brace (3) is connected to the cross brace fixing lug (5) by a hinge. The cross brace fixing lug (5) is provided with a cross brace mounting hole (11) and a cross brace fixing hole (9). The cross brace mounting hole (11) is located outside the cross brace fixing hole (9). The cross brace (3) is hinged through the cross brace mounting hole (11) and retracts to the central mast (2). The cross brace (3) is moved from the cross brace mounting hole (11) to the cross brace fixing hole (9) and fixed, thereby unfolding the cross brace (3).

2. The conveniently erected multi-feed multi-mode antenna according to claim 1, characterized in that: The cross brace fixing lug (5) is integrally welded or cast onto the central mast (2), and a groove (10) is provided on the cross brace fixing lug (5), which is located between the cross brace mounting hole (11) and the cross brace fixing hole (9).

3. The conveniently erected multi-feed multi-mode antenna according to claim 1, characterized in that: The cross brace (3) is made of lightweight alloy material.

4. A conveniently erected multi-feed multi-mode antenna according to claim 1, characterized in that: The cross brace (3) is connected to the cross brace mounting hole (11) or the cross brace fixing hole (9) by means of a pin, a shaft or a quick-release structure.

5. A conveniently erected multi-feed multi-mode antenna according to claim 1, characterized in that: A pull rope (12) is fitted between the cross brace (3) and the lower end fixing surface of the antenna.

6. A conveniently erected multi-feed multi-mode antenna according to claim 1, characterized in that: The lower end of the central mast (2) is provided with a mast base (6), which is fixed to the ground and used to support the central mast (2); the central mast (2) adopts a segmented structure, and the segments of the central mast (2) are connected by flanges (8).

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