Automatic continuous antenna tuner for radio station

Abstract

The utility model relates to the technical field of antenna tuners, in particular to an automatic continuous antenna tuner for a radio station. Comprising a main fixing frame, one side of the main fixing frame is connected with a motor, a coil framework is installed on the other side of the main fixing frame, a framework cover plate is arranged on the top of the coil framework, coils are wound on the outer sides of the coil framework and the framework cover plate, a magnetic ring sliding way is arranged in the coil framework, and a magnetic ring is movably arranged in the magnetic ring sliding way. One end of the magnetic ring extends out of the magnetic ring slide way to be connected with a magnetic ring fixing frame, the magnetic ring fixing frame is connected with a rotating shaft, and the rotating shaft penetrates through a center hole of the main fixing frame to be connected with an output shaft of the motor. The magnetic ring fixing frame drives the magnetic ring to rotate along the magnetic ring slide way, and a formed magnetic field and an electric field are changed along with the change of the length of the magnetic ring in the coil, so that uninterrupted and continuous tuning point values can be formed, and the impedance between the transmitter and the antenna is completely matched; therefore, the antenna can generate the maximum radiation power at any frequency.

Description

Technical Field:

[0001] The utility model relates to the technical field of antenna tuners, and particularly relates to an automatic continuous antenna tuner for a radio station. Background Art:

[0002] An antenna tuner is an impedance matching network connecting a transmitter and an antenna. The input impedance of the antenna varies greatly with frequency, while the output impedance of the transmitter is constant. If the transmitter is directly connected to the antenna, when the transmitter frequency changes, the impedance between the transmitter and the antenna is mismatched, which will reduce the radiation power. By using an antenna tuner, the impedance between the transmitter and the antenna can be matched, so that the antenna has the maximum radiation power at any frequency. The current antenna tuner mainly uses a control circuit and relays for tuning, and relies on the relays to set the tuning points. Each relay corresponds to a tuning point value. Due to the limited number of relays, the tuning points cannot cover all tuning values. When the tuning point is between two tuning values, only the nearest tuning value can be selected, which will lead to inaccurate tuning, and the impedance between the transmitter and the antenna cannot be fully matched, thus affecting the radiation power.

[0003] In summary, the above problems of the existing antenna tuner have become technical problems that need to be solved urgently in the industry. Content of the Utility Model:

[0004] The utility model provides an automatic continuous antenna tuner for a radio station to make up for the deficiencies of the existing technology, and solves the problem that the tuning is inaccurate and the radiation power is affected by relying on relays to set the tuning points in the past.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] An automatic continuous antenna tuner for a radio station includes a main fixing frame. One side of the main fixing frame is connected to a motor, and a coil bobbin is installed on the other side of the main fixing frame. A bobbin cover plate is arranged on the top of the coil bobbin. A coil is wound outside the coil bobbin and the bobbin cover plate. A magnetic ring slideway is arranged inside the coil bobbin, and a magnetic ring is movably arranged inside the magnetic ring slideway. One end of the magnetic ring extends outside the magnetic ring slideway and is connected to a magnetic ring fixing frame. The magnetic ring fixing frame is connected to a rotating shaft, and the rotating shaft passes through the central hole of the main fixing frame and is connected to the output shaft of the motor.

[0007] Two connecting columns are arranged on one side of the main fixing frame, and nuts are reserved inside the connecting columns. The motor is provided with ear plates corresponding to the two connecting columns, and bolts pass through the ear plates and are fixedly connected to the nuts.

[0008] The coil bobbin, the magnetic ring slideway and the magnetic ring are all arranged in an arc shape centered on the rotating shaft.

[0009] The main fixing frame and the coil skeleton are fixed by inserting and connecting with positioning posts.

[0010] At both bottom ends of the coil skeleton, a square positioning post and a circular positioning post are respectively provided, and on the main fixing frame, a square positioning hole and a circular positioning hole that are matched with the square positioning post and the circular positioning post are provided.

[0011] The skeleton cover plate is fixed by a buckle provided at the top of the coil skeleton.

[0012] On the outer surface of the coil skeleton, a plurality of partition ribs are arranged at intervals, and between the main fixing frame and the coil skeleton, a plurality of wire passing grooves are arranged at intervals.

[0013] In the magnetic ring fixing frame, a jack that is matched with the shape of the magnetic ring is provided, and the magnetic ring and the magnetic ring fixing frame are fixed by bonding with glue.

[0014] On the main fixing frame, a contact switch seat is provided, a contact switch is installed in the contact switch seat, and the contact switch is matched with the position of the magnetic ring fixing frame.

[0015] The main fixing frame, the coil skeleton, and the magnetic ring fixing frame are all made by integral injection molding.

[0016] The utility model adopts the above scheme and has the following beneficial effects:

[0017] By installing the coil skeleton on the main fixing frame, a skeleton cover plate is provided at the top of the coil skeleton, a coil is wound outside the coil skeleton and the skeleton cover plate, the magnetic ring fixing frame is driven to rotate by a motor via a rotating shaft, the magnetic ring fixing frame then drives the magnetic ring to rotate along the magnetic ring slideway, as the length of the magnetic ring in the coil changes, the formed magnetic field changes, and the electric field also changes accordingly, so that an uninterrupted and continuous tuning point value can be formed, enabling the impedance between the transmitter and the antenna to be completely matched, and thus enabling the antenna to generate the maximum radiation power at any frequency. Description of the drawings:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the main fixing frame of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the coil skeleton of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the magnetic ring fixing frame of the utility model.

[0022] In the figure, 1 is the main fixing frame, 2 is the motor, 3 is the coil skeleton, 4 is the skeleton cover plate, 5 is the magnetic ring slideway, 6 is the magnetic ring, 7 is the magnetic ring fixing frame, 8 is the rotating shaft, 9 is the connecting column, 10 is the ear plate, 11 is the square positioning column, 12 is the circular positioning column, 13 is the square positioning hole, 14 is the circular positioning hole, 15 is the buckle, 16 is the separating rib, 17 is the wire passing groove, 18 is the contact switch seat, and 19 is the contact switch. Specific implementation manner:

[0023] To clearly illustrate the technical features of this solution, the present utility model will be elaborated in detail below through specific implementation manners and in conjunction with its accompanying drawings.

[0024] Combined with the embodiment shown in Figures 1-4 An automatic continuous antenna tuner for a radio station includes a main fixing frame 1. One side of the main fixing frame 1 is connected to a motor 2, and on the other side of the main fixing frame 1, a coil skeleton 3 is installed. A skeleton cover plate 4 is provided at the top of the coil skeleton 3. A coil is wound outside the coil skeleton 3 and the skeleton cover plate 4. A magnetic ring slideway 5 is provided inside the coil skeleton 3, and a magnetic ring 6 is movably arranged in the magnetic ring slideway 5. One end of the magnetic ring 6 extends outside the magnetic ring slideway 5 and is connected to a magnetic ring fixing frame 7. The magnetic ring fixing frame 7 is connected to a rotating shaft 8, and the rotating shaft 8 passes through the central hole of the main fixing frame 1 and is connected to the output shaft of the motor 2.

[0025] Two connecting columns 9 are provided on one side of the main fixing frame 1. Nuts are reserved inside the connecting columns 9. The motor 2 is provided with ear plates 10 corresponding to the positions of the two connecting columns 9, and bolts pass through the ear plates 10 and are fixedly connected to the nuts.

[0026] The coil skeleton 3, the magnetic ring slideway 5, and the magnetic ring 6 are all arranged in an arc shape centered on the rotating shaft 8, so as to facilitate the rotation of the magnetic ring 6 around the rotating shaft 8 in the magnetic ring slideway 5.

[0027] The main fixing frame 1 and the coil skeleton 3 are fixedly connected by inserting positioning columns, which is convenient for connection and disassembly.

[0028] Square positioning columns 11 and circular positioning columns 12 are respectively provided at the bottom of both ends of the coil skeleton 3. Square positioning holes 13 and circular positioning holes 14 that cooperate with the square positioning columns 11 and the circular positioning columns 12 are provided on the main fixing frame 1. The cooperation of the square positioning columns 11 and the circular positioning columns 12 can enhance the connection effect.

[0029] The skeleton cover plate 4 is fixed and limited by buckles 15 provided on the top of the coil skeleton 3, which can prevent the position of the skeleton cover plate 4 from shifting.

[0030] A number of separating ribs 16 are provided at intervals on the outer surface of the coil skeleton 3, and a number of wire passing grooves 17 are provided at intervals between the main fixing frame 1 and the coil skeleton 3 to facilitate the winding of the coil outside the coil skeleton 3 and the skeleton cover plate 4.

[0031] The magnetic ring fixing bracket 7 is provided with a jack that matches the shape of the magnetic ring 6, and the magnetic ring 6 and the magnetic ring fixing bracket 7 are fixedly bonded by glue.

[0032] The main fixing bracket 1 is provided with a contact switch seat 18, and a contact switch 19 is installed in the contact switch seat 18. The contact switch 19 is matched with the position of the magnetic ring fixing bracket 7. When the rotating shaft 8 drives the magnetic ring fixing bracket 7 to rotate to the position of the contact switch 19, at this time, the magnetic ring 6 completely disengages from the magnetic ring slideway 5, completing the maximum adjustment range. At this time, the contact switch 19 sends a signal to control the motor 2 to stop working.

[0033] The main fixing bracket 1, the coil bobbin 3, and the magnetic ring fixing bracket 7 are all integrally injection-molded, with low cost and convenient for processing and manufacturing.

[0034] Working principle:

[0035] During operation, the output shaft of the motor 2 drives the rotating shaft 8 to rotate, the rotating shaft 8 drives the magnetic ring fixing bracket 7 to rotate, and the magnetic ring fixing bracket 7 drives the magnetic ring 6 to rotate along the magnetic ring slideway 5. As the position of the magnetic ring 6 in the magnetic ring slideway 5 changes, the overlapping length of the magnetic ring 6 and the coil also changes, and the formed magnetic field changes accordingly, and the electric field also changes. Thus, an uninterrupted and continuous tuning point value can be formed, making the impedance between the transmitter and the antenna completely matched, so that the antenna will generate the maximum radiation power at any frequency. When the rotating shaft 8 drives the magnetic ring fixing bracket 7 to rotate to the position of the contact switch 19, at this time, the magnetic ring 6 completely disengages from the magnetic ring slideway 5, completing the maximum adjustment range. At this time, the contact switch 19 sends a signal to control the motor 2 to stop working, and the reverse rotation of the motor 2 can drive the magnetic ring 6 to reset to the initial position.

[0036] The above specific implementation manners cannot be used as a limitation to the protection scope of the present utility model. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manners of the present utility model falls within the protection scope of the present utility model.

[0037] Those parts not detailed in the present utility model are all well-known technologies to those skilled in the art of this technology.

Claims

1. An automatic continuous antenna tuner for a radio station, characterized in that: It includes a main fixing frame, one side of the main fixing frame is connected to the motor, the other side of the main fixing frame is installed with a coil frame, a frame cover is provided on the top of the coil frame, a coil is wound around the outside of the coil frame and the frame cover, a magnetic ring slide is provided inside the coil frame, a magnetic ring is movably provided inside the magnetic ring slide, one end of the magnetic ring extends outside the magnetic ring slide and is connected to the magnetic ring fixing frame, the magnetic ring fixing frame is connected to a rotating shaft, and the rotating shaft passes through the center hole of the main fixing frame and is connected to the output shaft of the motor.

2. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: Two connecting columns are arranged on one side of the main fixing frame, nuts are reserved in the connecting columns, ear plates are arranged at positions of the motor corresponding to the two connecting columns, and bolts pass through the ear plates and are fixedly connected with the nuts.

3. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The coil frame, the magnetic ring slideway and the magnetic ring are all arranged in an arc shape with the rotating shaft as the center.

4. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The main fixing frame and the coil frame are plugged and fixed via positioning columns.

5. The automatic continuous antenna tuner for a radio station according to claim 4, characterized in that: The bottoms of both ends of the coil frame are respectively provided with a square positioning column and a circular positioning column, and the main fixing frame is provided with a square positioning hole and a circular positioning hole which match the square positioning column and the circular positioning column.

6. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The frame cover is fixed by a buckle arranged on the top of the coil frame.

7. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: A plurality of separation ribs are arranged at intervals on the outer surface of the coil frame, and a plurality of wire passing grooves are arranged at intervals between the main fixing frame and the coil frame.

8. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The magnetic ring fixing frame is provided with a plug hole matching the shape of the magnetic ring, and the magnetic ring and the magnetic ring fixing frame are fixed by adhesive bonding.

9. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The main fixing frame is provided with a contact switch seat, in which a contact switch is installed, and the contact switch is matched with the position of the magnetic ring fixing frame.

10. The automatic continuous antenna tuner for a radio station according to claim 1, characterized in that: The main fixing frame, the coil frame and the magnetic ring fixing frame are all made by integral injection molding.

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