Carbon fiber whip antenna structure and forming method

Abstract

The present application relates to whip antenna technical field, specifically to carbon fiber whip antenna structure and forming method. The existing carbon fiber whip antenna conduction performance is poor, the resistance value is large, the radiation efficiency is low. The carbon fiber whip antenna structure includes first metal joint, carbon fiber tube and second metal joint and the conductive wire connecting two metal joints. Its forming method is that the first metal joint and the second metal joint are installed at both ends of the mold; carbon fiber prepreg is laid; the conductive wire is wound; carbon fiber prepreg is laid again; the antenna outer surface is wrapped with metal mesh; the metal mesh is wound and fixed with the conductive wire; the connecting part of the metal mesh and the first metal joint and the second metal joint is wound with carbon fiber prepreg respectively; compaction and solidification; demolding. The carbon fiber whip antenna has good conduction performance, small resistance value, high resistance radiation efficiency, light structure quality, excellent mechanical properties, fatigue resistance, corrosion resistance, large power bearing, high radiation efficiency, long service life, high efficiency of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of whip antenna technology, specifically to the structure and molding method of carbon fiber whip antenna. Background Technology

[0002] A whip antenna is a flexible, vertical rod-shaped antenna, typically with a length of 1 / 4 or 1 / 2 wavelength. Whip antennas are a common type of shortwave antenna, widely used due to their advantages such as simple structure, small size, omnidirectionality, and ease of mobility.

[0003] Currently, there are two main methods for forming and manufacturing the antenna mast of whip antennas on the market: The first method is to use metal tubes or rods to make the antenna body. The connection between antenna sections is mostly done by plugging or threading. Antennas made by this method have disadvantages such as poor mechanical properties, heavy weight, and poor corrosion resistance because they use too much metal and the connection method has low strength.

[0004] The second method involves using carbon fiber to make the antenna tube. The carbon fiber antenna tube is bonded to the metal embedded part with adhesive, and the surface is coated with conductive glue or conductive paint to ensure conductivity. Although conductive glue or conductive paint has conductivity, its conductivity is poor, and carbon fiber itself is not conductive. Therefore, antennas made by this method have disadvantages such as poor conductivity, high resistance, and reduced radiation efficiency.

[0005] Whip antennas are frequently used in mobile communication scenarios such as soldier radios, vehicle radios, and shipboard radios. Therefore, they require good conduction performance and high antenna radiation efficiency within a small size and weight. Existing carbon fiber whip antennas suffer from poor conduction performance, high resistance, and reduced radiation efficiency, failing to meet these requirements. Therefore, the market needs a carbon fiber whip antenna with good conduction performance, low resistance, and high radiation efficiency. Summary of the Invention

[0006] To address the aforementioned problems of poor conductivity, high resistance, and reduced radiation efficiency in existing carbon fiber whip antennas, this invention proposes a carbon fiber whip antenna structure and molding method, the specific solution of which is as follows:

[0007] The carbon fiber whip antenna structure includes a carbon fiber whip antenna element. The carbon fiber whip antenna element includes a first metal connector, a carbon fiber tube, a conductive wire, and a second metal connector. The first metal connector and the second metal connector are respectively fixed to both ends of the carbon fiber tube. The main body of the conductive wire is embedded in the tube wall of the carbon fiber tube, and the two ends of the conductive wire extend out of the tube wall of the carbon fiber tube. The first metal connector and the second metal connector are connected through the two ends of the conductive wire.

[0008] Furthermore, the carbon fiber whip antenna structure includes two or more carbon fiber whip antenna elements. Each carbon fiber whip antenna element includes a first metal connector, a carbon fiber tube, a conductive wire, and a second metal connector. The first metal connector and the second metal connector are respectively fixed to both ends of the carbon fiber tube. The main body of the conductive wire is embedded in the tube wall of the carbon fiber tube, and both ends of the conductive wire extend out of the tube wall of the carbon fiber tube. The first metal connector and the second metal connector are connected through the two ends of the conductive wire. The first metal connector of one carbon fiber whip antenna element is connected to the second metal connector of another carbon fiber whip antenna element.

[0009] Furthermore, the first metal connector includes a connector head, a first limiting component, a first conductive wire fixing component, and a first fixing component connected in sequence; the second metal connector includes a second fixing component, a second conductive wire fixing component, and a second limiting component connected in sequence; the second limiting component has a connecting hole at its center that matches the shape of the connector head; the first metal connector is fixed to one end of the carbon fiber tube through the first fixing component; the second metal connector is fixed to the other end of the carbon fiber tube through the second fixing component; the carbon fiber tube is confined between the first limiting component and the second limiting component; one end of the conductive wire is wound around the first conductive wire fixing component, and the other end of the conductive wire is wound around the second conductive wire fixing component;

[0010] Furthermore, the outer surface of the carbon fiber tube is wrapped with a metal mesh;

[0011] A method for forming a carbon fiber whip antenna includes the following steps:

[0012] [1]: Preparations

[0013] 1.1) Prepare a first metal connector, a second metal connector, and a mold. The first metal connector includes a connector head, a first limiting component, a first conductive wire fixing component, and a first fixing component connected in sequence. The second metal connector includes a second fixing component, a second conductive wire fixing component, and a second limiting component connected in sequence. The center of the second limiting component is provided with a connecting hole that matches the shape of the connector head. The mold is a conventional mold for carbon fiber tube forming, and its shape is a tapered rod. The mold undergoes demolding pretreatment.

[0014] [2]: Manufacturing carbon fiber tubes,

[0015] 2.1) The first metal connector and the second metal connector are respectively installed at both ends of the mold, and the first fixing component and the second fixing component are arranged opposite to each other;

[0016] 2.2) A first carbon fiber layer is formed by laying carbon fiber prepreg on the surfaces of the first fixing component, the mold, and the second fixing component;

[0017] 2.3) A conductive wire layer is formed by winding conductive wires around the outside of the first carbon fiber layer;

[0018] 2.4) A second carbon fiber layer is formed by laying carbon fiber prepreg on the outside of the conductive wire layer;

[0019] 2.5) A metal mesh layer is formed by wrapping the surface of the second carbon fiber layer with a metal mesh, and the two ends of the metal mesh layer extend to the first limiting member and the second limiting member, respectively;

[0020] 2.6) The metal mesh is wrapped and fixed with conductive wire at the first conductive wire fixing component and the second conductive wire fixing component, respectively;

[0021] 2.7) Wrap the first limiting component and the second limiting component with carbon fiber prepreg respectively;

[0022] 2.8) The carbon fiber prepreg is cured after compaction;

[0023] [3]: Form carbon fiber whip antenna elements.

[0024] 3.1) Remove the heat shrink tape, remove the burrs from the surface of the carbon fiber whip antenna, take out the mold, and form the carbon fiber whip antenna unit;

[0025] [4]: Fabrication of carbon fiber whip antenna.

[0026] 4.1) A carbon fiber whip antenna, which includes a section of carbon fiber whip antenna element, is formed directly from the carbon fiber whip antenna element.

[0027] 4.2) A carbon fiber whip antenna is formed by connecting two or more connected carbon fiber whip antenna elements through the connector of one carbon fiber whip antenna element to the connector hole of another carbon fiber whip antenna element.

[0028] Furthermore, the method for laying the carbon fiber prepreg in step 2.2) is as follows:

[0029] 2.2.1) First, the carbon fiber prepreg is laid along the mold axis, avoiding the first and second conductive wire fixing parts;

[0030] 2.2.2) Stop laying the carbon fiber prepreg when it reaches 2 / 3 of the total thickness of the carbon fiber tube;

[0031] Furthermore, step 2.3) includes:

[0032] 2.3.1) The conductive wire is spirally wound along the mold axis on the surface of the carbon fiber prepreg, with a pitch of 50-100 mm;

[0033] 2.3.2) Check if the conductive wire is knotted or broken. If not, proceed to step 2.4). If it is knotted or broken, clean the knotted or broken conductive wire and then proceed to step 2.3.

[0034] Furthermore, a resin film is provided on the surface of the metal mesh;

[0035] Furthermore, step 2.8) includes:

[0036] 2.8.1) Wrap heat-shrinkable tape around the outer surface of the metal mesh (2);

[0037] 2.8.2) Pressure curing of carbon fiber prepreg;

[0038] Furthermore, the resistance of the conductive wire is less than 0.2Ω.

[0039] The beneficial effects of this invention are as follows:

[0040] 1. Compared to carbon fiber whip antennas that use adhesive bonding between the metal parts at both ends: The carbon fiber whip antenna made by this invention solves the problems of high resistance and poor conductivity of existing carbon fiber whip antennas by incorporating conductive wires. The resistance of existing carbon fiber whip antennas ranges from 1 to 40 Ω, while the resistance of the carbon fiber whip antenna made by this invention is only 0.2 to 0.3 Ω. The resistance of the carbon fiber whip antenna made by this invention is on the same order of magnitude as that of the metal connector, completely eliminating the adverse effects of carbon fiber materials, conductive adhesives, or conductive paints on the antenna resistance. Lower antenna resistance results in higher radiation efficiency; therefore, the carbon fiber whip antenna structure of this invention has the advantages of good conductivity, low resistance, and high radiation efficiency.

[0041] 2. The carbon fiber whip antenna structure of the present invention has the advantages of simple structure, simple molding method and high manufacturing efficiency;

[0042] 3. The carbon fiber whip antenna of the present invention has the advantages of light weight, excellent mechanical properties, good fatigue resistance, corrosion resistance, high power handling capacity, and long service life due to the use of an integrated co-curing molding process. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of the carbon fiber whip antenna of the present invention;

[0044] Figure 2 This is a cross-sectional view of the carbon fiber whip antenna structure of the present invention;

[0045] Figure 3 This is a schematic diagram of the first metal connector structure of the present invention;

[0046] Figure 4 This is a schematic diagram of the second metal connector structure of the present invention;

[0047] in:

[0048] 1. First metal connector; 2. Metal mesh; 3. Carbon fiber tube; 4. Conductive wire; 5. Second metal connector; 6. First conductive wire fixing component; 7. Connector; 8. First limiting component; 9. First fixing component; 10. Second fixing component; 11. Connecting hole; 12. Second limiting component; 13. Second conductive wire fixing component. Detailed Implementation

[0049] To more clearly illustrate the technical solution of the present invention, the following is combined with... Figures 1-4 The present invention will now be described in more detail. Based on the present invention, any technical solutions obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] The carbon fiber whip antenna structure includes a carbon fiber whip antenna element. The carbon fiber whip antenna element includes a first metal connector 1, a carbon fiber tube 3, a conductive wire 4, and a second metal connector 5. The first metal connector 1 and the second metal connector 5 are respectively fixed to both ends of the carbon fiber tube 3. The conductive wire 4 is mainly embedded in the tube wall of the carbon fiber tube 3, and both ends of the conductive wire 4 extend out of the tube wall of the carbon fiber tube 3. The first metal connector 1 and the second metal connector 5 are connected through the two ends of the conductive wire 4.

[0052] The first metal connector 1 includes a connector 7, a first limiting component 8, a first conductive wire fixing component 6, and a first fixing component 9 connected in sequence. The second metal connector 5 includes a second fixing component 10, a second conductive wire fixing component 13, and a second limiting component 12 connected in sequence. The center of the second limiting component 12 is provided with a connecting hole 11 that matches the shape of the connector 7. The first metal connector 1 is fixed to one end of the carbon fiber tube 3 through the first fixing component 9, and the second metal connector 5 is fixed to the other end of the carbon fiber tube 3 through the second fixing component 10. The carbon fiber tube 3 is confined between the first limiting component 8 and the second limiting component 12. One end of the conductive wire 4 is wound around the first conductive wire fixing component 6, and the other end of the conductive wire 4 is wound around the second conductive wire fixing component 13.

[0053] The outer surface of the carbon fiber tube 3 is wrapped with a metal mesh 2, and the conductive wire 4 is embedded in the tube wall of the carbon fiber tube 3. The two ends of the conductive wire 4 extend out of the tube wall of the carbon fiber tube 3.

[0054] A method for forming a carbon fiber whip antenna includes the following steps:

[0055] [1]: Preparations

[0056] 1.1) Prepare a first metal connector 1, a second metal connector 5 and a mold. The first metal connector 1 includes a connector 7, a first limiting component 8, a first conductive wire fixing component 6 and a first fixing component 9 connected in sequence. The second metal connector 5 includes a second fixing component 10, a second conductive wire fixing component 13 and a second limiting component 12 connected in sequence. The center of the second limiting component 12 is provided with a connecting hole 11 that matches the shape of the connector 7.

[0057] The mold is a standard mold used for molding carbon fiber tubes 3, and its shape is a tapered rod. The mold undergoes a pre-treatment process, which involves applying a release agent and other easily release solvents to the mold surface.

[0058] [2]: Making carbon fiber tube 3,

[0059] 2.1) The first metal connector 1 and the second metal connector 5 are respectively set at both ends of the mold, and the first fixing component 9 and the second fixing component 10 are arranged opposite to each other;

[0060] 2.2) A first carbon fiber layer is formed by laying carbon fiber prepreg on the surfaces of the first fixing component 9, the mold, and the second fixing component 10;

[0061] Step 2.2) The method for laying the carbon fiber prepreg is as follows:

[0062] 2.2.1) First, the carbon fiber prepreg is laid along the mold axis, avoiding the first conductive wire fixing component 6 and the second conductive wire fixing component 13.

[0063] 2.2.2) Stop laying the carbon fiber prepreg when it reaches 2 / 3 of the total thickness of the carbon fiber tube 3.

[0064] 3) A conductive wire 4 is wound around the outside of the first carbon fiber layer to form a conductive wire layer;

[0065] Step 2.3) includes:

[0066] 2.3.1) Conductive wire 4 is spirally wound along the mold axis on the surface of carbon fiber prepreg with a pitch of 50-100 mm;

[0067] In this embodiment, the winding pitch of the conductive wire 4 is 75mm.

[0068] In step 2.3.1), the screw pitch is determined according to the following principles: the larger the screw pitch of the conductive wire 4, the less material is needed for the conductive wire 4, resulting in a lighter final product, saving materials and reducing costs; the smaller the screw pitch of the conductive wire 4, the tighter the bond between the conductive wire 4 and the carbon fiber prepreg, and the better the reliability of the product. Based on production experience, a screw pitch of 50–100 mm is recommended for the conductive wire 4.

[0069] 2.3.2) Check if the conductive wire 4 is knotted or broken. If not, proceed to step 2.4). If it is knotted or broken, clean the knotted or broken conductive wire 4 and then proceed to step 2.3).

[0070] 2.4) A second carbon fiber layer is formed by laying carbon fiber prepreg on the outside of the conductive wire layer;

[0071] 2.5) A metal mesh layer is formed by wrapping the surface of the second carbon fiber layer with metal mesh 2, and the two ends of the metal mesh layer extend to the first limiting member 8 and the second limiting member 12, respectively.

[0072] 2.6) The metal mesh 2 is fixed by wrapping conductive wire 4 around the first conductive wire fixing part 6 of the first metal connector 1 and the second conductive wire fixing part 13 of the second metal connector 5 respectively. The number of turns of the conductive wire 4 is 3 to 5.

[0073] 2.7) Wrap the first limiting component at 8 locations and the second limiting component at 12 locations with carbon fiber prepreg, with 3 to 5 turns.

[0074] 2.8) The carbon fiber prepreg is cured after compaction.

[0075] Step 2.8) includes:

[0076] 2.8.1) Wrap heat-shrink tape around the outer surface of the metal mesh 2;

[0077] 2.8.2) Pressurize and cure the carbon fiber prepreg.

[0078] The process parameters (pressure, temperature, curing time, etc.) for pressure curing of carbon fiber prepreg in step 2.8.2) are related to the specific characteristics of the carbon fiber prepreg used. Pressure curing is a conventional and mature process, and can be flexibly adjusted according to specific circumstances in practice.

[0079] [3]: Form carbon fiber whip antenna elements.

[0080] 3.1) Remove the heat shrink tape, remove the burrs on the surface of the carbon fiber whip antenna, take out the mold, and form the carbon fiber whip antenna unit.

[0081] [4]: Fabrication of carbon fiber whip antenna

[0082] 4.1) A carbon fiber whip antenna, which includes a section of carbon fiber whip antenna element, is formed directly from the carbon fiber whip antenna element.

[0083] 4.2) A carbon fiber whip antenna, comprising two or more connected carbon fiber whip antenna elements, is formed by connecting the connector 7 of one carbon fiber whip antenna element to the connector hole 11 of another carbon fiber whip antenna element.

[0084] The number of conductive wires 4 can be one or more. When there are multiple conductive wires 4, the antenna resistance is low and the radiation efficiency is high; however, too many conductive wires 4 will increase the weight of the carbon fiber whip antenna structure, reducing its advantage of being lightweight. When there is only one conductive wire 4, the carbon fiber whip antenna structure is lightweight, but its advantage in antenna resistance is not as good as with multiple conductive wires 4. Therefore, based on practical production experience, the preferred number of conductive wires 4 is one to three.

[0085] The conductive wire 4 is made of copper, aluminum, or silver, with copper being the most suitable due to its good conductivity and low cost.

[0086] The diameter of the conductive wire 4 is between 0.15 and 0.2 mm. A smaller diameter of the conductive wire 4 results in a poorer reduction in antenna resistance and a less effective improvement in radiation efficiency. Therefore, based on production experience, the lower limit for the diameter of the conductive wire 4 is 0.15 mm. A larger diameter of the conductive wire 4 reduces the lightweight advantage of the carbon fiber whip antenna. Therefore, based on production experience, the upper limit for the diameter of the conductive wire 4 is 0.2 mm.

[0087] The conductive wire 4 serves to reduce resistance, and its resistance value should be less than the sum of the resistances of the first metal connector 1 and the second metal connector 5.

[0088] In this embodiment, the conductive wire 4 consists of three copper wires with a diameter of 0.15 mm, and the equivalent resistance of the three copper wires is less than 0.2 Ω. The three conductive wires 4 are evenly spirally embedded in the wall of the carbon fiber tube 3, around the center. The spiral pitch of the conductive wires 4 is 75 mm.

[0089] The surface of the metal mesh 2 is covered with a resin film.

[0090] The function of the first limiting component 8 is to fix the position of the first metal connector 1 and prevent the relative positional relationship between the first metal connector 1 and the carbon fiber tube 3 from shifting. The function of the second limiting component 12 is similar to that of the first limiting component 8. The function of the first conductive wire fixing component 6 and the second conductive wire fixing component 13 is to roughen the surface and provide adhesion for fixing the conductive wire 4.

[0091] The first metal connector 1 and the second metal connector 5 are hollow, stepped shafts. The first limiting component 8 and the second limiting component 12 both use a protruding stepped structure for limiting. The first conductive wire fixing component 6 and the second conductive wire fixing component 13 are made by surface groove pressing, with each groove measuring 1mm in width and depth, and there are three or more of these grooves. The first metal connector 1 and the second metal connector 5 are made of titanium alloy. The connector 7 and the connector hole 11 can be connected by threads or by plugging; this embodiment uses a plugging connection.

[0092] Example 2

[0093] The carbon fiber whip antenna structure includes two or more carbon fiber whip antenna elements; this embodiment includes three carbon fiber whip antenna elements. Each carbon fiber whip antenna element includes a first metal connector 1, a carbon fiber tube 3, a conductive wire 4, and a second metal connector 5. The first metal connector 1 and the second metal connector 5 are respectively fixed to both ends of the carbon fiber tube 3. The conductive wire 4 is mainly embedded in the tube wall of the carbon fiber tube 3, with both ends extending out of the tube wall. The first metal connector 1 and the second metal connector 5 are connected through the two ends of the conductive wire 4. The first metal connector 1 of one carbon fiber whip antenna element is connected to the second metal connector 5 of another carbon fiber whip antenna element.

[0094] The first metal connector 1 includes a connector 7, a first limiting component 8, a first conductive wire fixing component 6, and a first fixing component 9 connected in sequence. The second metal connector 5 includes a second fixing component 10, a second conductive wire fixing component 13, and a second limiting component 12 connected in sequence. The center of the second limiting component 12 is provided with a connecting hole 11 that matches the shape of the connector 7. The first metal connector 1 is fixed to one end of the carbon fiber tube 3 through the first fixing component 9, and the second metal connector 5 is fixed to the other end of the carbon fiber tube 3 through the second fixing component 10. The carbon fiber tube 3 is confined between the first limiting component 8 and the second limiting component 12. One end of the conductive wire 4 is wound around the first conductive wire fixing component 6, and the other end of the conductive wire 4 is wound around the second conductive wire fixing component 13.

[0095] The outer surface of the carbon fiber tube 3 is wrapped with a metal mesh 2, and the conductive wire 4 is embedded in the tube wall of the carbon fiber tube 3. The two ends of the conductive wire 4 extend out of the tube wall of the carbon fiber tube 3.

[0096] A method for forming a carbon fiber whip antenna includes the following steps:

[0097] [1]: Preparations

[0098] 1.1) Prepare a first metal connector 1, a second metal connector 5 and a mold. The first metal connector 1 includes a connector 7, a first limiting component 8, a first conductive wire fixing component 6 and a first fixing component 9 connected in sequence. The second metal connector 5 includes a second fixing component 10, a second conductive wire fixing component 13 and a second limiting component 12 connected in sequence. The center of the second limiting component 12 is provided with a connecting hole 11 that matches the shape of the connector 7.

[0099] The mold is a standard mold used for molding carbon fiber tubes 3, and its shape is a tapered rod. The mold undergoes a pre-treatment process, which involves applying a release agent and other easily release solvents to the mold surface.

[0100] [2]: Making carbon fiber tube 3,

[0101] 2.1) The first metal connector 1 and the second metal connector 5 are respectively set at both ends of the mold, and the first fixing component 9 and the second fixing component 10 are arranged opposite to each other;

[0102] 2.2) A first carbon fiber layer is formed by laying carbon fiber prepreg on the surfaces of the first fixing component 9, the mold, and the second fixing component 10;

[0103] Step 2.2) The method for laying the carbon fiber prepreg is as follows:

[0104] 2.2.1) First, the carbon fiber prepreg is laid along the mold axis, avoiding the first conductive wire fixing component 6 and the second conductive wire fixing component 13.

[0105] 2.2.2) Stop laying the carbon fiber prepreg when it reaches 2 / 3 of the total thickness of the carbon fiber tube 3.

[0106] 3) A conductive wire 4 is wound around the outside of the first carbon fiber layer to form a conductive wire layer;

[0107] Step 2.3) includes:

[0108] 2.3.1) Conductive wire 4 is spirally wound along the mold axis on the surface of carbon fiber prepreg with a pitch of 50-100 mm;

[0109] In this embodiment, the winding pitch of the conductive wire 4 is 100mm.

[0110] In step 2.3.1), the screw pitch is determined according to the following principles: the larger the screw pitch of the conductive wire 4, the less material is needed for the conductive wire 4, resulting in a lighter final product, saving materials and reducing costs; the smaller the screw pitch of the conductive wire 4, the tighter the bond between the conductive wire 4 and the carbon fiber prepreg, and the better the reliability of the product. Based on production experience, a screw pitch of 50–100 mm is recommended for the conductive wire 4.

[0111] 2.3.2) Check if the conductive wire 4 is knotted or broken. If not, proceed to step 2.4). If it is knotted or broken, clean the knotted or broken conductive wire 4 and then proceed to step 2.3).

[0112] 2.4) A second carbon fiber layer is formed by laying carbon fiber prepreg on the outside of the conductive wire layer;

[0113] 2.5) A metal mesh layer is formed by wrapping the surface of the second carbon fiber layer with metal mesh 2, and the two ends of the metal mesh layer extend to the first limiting member 8 and the second limiting member 12, respectively.

[0114] 2.6) The metal mesh 2 is fixed by wrapping conductive wire 4 around the first conductive wire fixing part 6 of the first metal connector 1 and the second conductive wire fixing part 13 of the second metal connector 5 respectively. The number of turns of the conductive wire 4 is 3 to 5.

[0115] 2.7) Wrap the first limiting component at 8 locations and the second limiting component at 12 locations with carbon fiber prepreg, with 3 to 5 turns each;

[0116] 2.8) The carbon fiber prepreg is cured after compaction.

[0117] Step 2.8) includes:

[0118] 2.8.1) Wrap heat-shrink tape around the outer surface of the metal mesh 2;

[0119] 2.8.2) Pressurize and cure the carbon fiber prepreg.

[0120] The process parameters (pressure, temperature, curing time, etc.) for pressure curing of carbon fiber prepreg in step 2.8.2) are related to the specific characteristics of the carbon fiber prepreg used. Pressure curing is a conventional and mature process, and can be flexibly adjusted according to specific circumstances in practice.

[0121] [3]: Form carbon fiber whip antenna elements.

[0122] 3.1) Remove the heat shrink tape, remove the burrs on the surface of the carbon fiber whip antenna, take out the mold, and form the carbon fiber whip antenna unit.

[0123] [4]: Fabrication of carbon fiber whip antenna

[0124] 4.1) A carbon fiber whip antenna, which includes a section of carbon fiber whip antenna element, is formed directly from the carbon fiber whip antenna element.

[0125] 4.2) A carbon fiber whip antenna, comprising two or more connected carbon fiber whip antenna elements, is formed by connecting the connector 7 of one carbon fiber whip antenna element to the connector hole 11 of another carbon fiber whip antenna element.

[0126] The number of conductive wires 4 is one or more. The material of conductive wire 4 is copper, aluminum, or silver, with copper being the most suitable due to its good conductivity and low cost. The diameter of conductive wire 4 is between 0.15 and 0.2 mm. Conductive wire 4 serves to reduce resistance; its resistance value should be less than the sum of the resistances of the first metal connector 1 and the second metal connector 5. In this embodiment, conductive wire 4 is a single aluminum wire with a diameter of 0.2 mm, and its resistance value is less than 0.2 Ω. In step 2.3.1), the winding pitch of conductive wire 4 is 100 mm. A resin film is provided on the surface of the metal mesh 2.

[0127] The function of the first limiting component 8 is to fix the position of the first metal connector 1 and prevent the relative positional relationship between the first metal connector 1 and the carbon fiber tube 3 from shifting. The function of the second limiting component 12 is similar to that of the first limiting component 8. The function of the first conductive wire fixing component 6 and the second conductive wire fixing component 13 is to roughen the surface and provide adhesion for fixing the conductive wire 4.

[0128] In this embodiment, the first metal connector 1 and the second metal connector 5 are hollow stepped shafts. The first limiting component 8 and the second limiting component 12 both use protruding limiting block structures for limiting. The first conductive wire fixing component 6 and the second conductive wire fixing component 13 are manufactured by pressing diamond-patterned strips with a depth of 1 mm and a width of 3 mm onto the surfaces of the first metal connector 1 and the second metal connector 5. The first metal connector 1 and the second metal connector 5 are made of titanium alloy. The connector 7 and the connecting hole 11 can be connected by threads or by insertion; this embodiment uses a threaded connection.

[0129] Example 3

[0130] In this embodiment, the conductive wire 4 is a single copper wire with a diameter of 0.18 mm and a resistance of less than 0.2 Ω. The conductive wire 4 is spirally embedded in the wall of the carbon fiber tube 3, winding around its center. The spiral pitch of the conductive wire 4 is 50 mm.

[0131] The first conductive wire fixing component 6 and the second conductive wire fixing component 13 are made by surface pressing grooves. The grooves are 2mm wide and 1mm deep, and there are 2 of them.

[0132] The remaining features of Example 3 are the same as those of Example 1.

[0133] Example 4

[0134] In this embodiment, the conductive wire 4 consists of three silver wires with a diameter of 0.2 mm, and the equivalent resistance of the three silver wires is less than 0.2 Ω. The conductive wire 4 is evenly spirally embedded in the wall of the carbon fiber tube 3, around the center. The spiral pitch of the conductive wire 4 is 80 mm.

[0135] The remaining features of Example 4 are the same as those of Example 2.

[0136] The carbon fiber whip antenna produced by this invention exhibits excellent conductivity, low resistance, and high resistive radiation efficiency. By connecting multiple carbon fiber whip antenna elements end-to-end, a carbon fiber whip antenna of the desired length can be assembled. Furthermore, the carbon fiber whip antenna produced by this invention is lightweight, possesses excellent mechanical properties, is fatigue-resistant, corrosion-resistant, can withstand high power, and has a long product lifespan.

Claims

1. A carbon fiber whip antenna structure, characterized in that, The device includes a carbon fiber whip antenna unit, which includes a first metal connector (1), a carbon fiber tube (3), a conductive wire (4), and a second metal connector (5). The first metal connector (1) and the second metal connector (5) are respectively fixed to both ends of the carbon fiber tube (3). The carbon fiber tube (3) includes a first carbon fiber layer and a second carbon fiber layer. The conductive wire (4) is located between the first carbon fiber layer and the second carbon fiber layer. The two ends of the conductive wire (4) extend out of the tube wall of the carbon fiber tube (3). The first metal connector (1) and the second metal connector (5) are connected through the two ends of the conductive wire (4).

2. The carbon fiber whip antenna structure according to claim 1, characterized in that, The device includes two or more carbon fiber whip antenna units. Each carbon fiber whip antenna unit includes a first metal connector (1), a carbon fiber tube (3), a conductive wire (4), and a second metal connector (5). The first metal connector (1) and the second metal connector (5) are respectively fixed to both ends of the carbon fiber tube (3). The carbon fiber tube (3) includes a first carbon fiber layer and a second carbon fiber layer. The conductive wire (4) is located between the first carbon fiber layer and the second carbon fiber layer. Both ends of the conductive wire (4) extend out of the tube wall of the carbon fiber tube (3). The first metal connector (1) and the second metal connector (5) are connected through the two ends of the conductive wire (4). The first metal connector (1) of one carbon fiber whip antenna unit is connected to the second metal connector (5) of another carbon fiber whip antenna unit.

3. The carbon fiber whip antenna structure according to claim 1 or 2, characterized in that, The first metal connector (1) includes a connector (7), a first limiting component (8), a first conductive wire fixing component (6), and a first fixing component (9) connected in sequence. The second metal connector (5) includes a second fixing component (10), a second conductive wire fixing component (13), and a second limiting component (12) connected in sequence. The second limiting component (12) has a connecting hole (11) at its center that matches the shape of the connector (7). The first metal connector (1) is fixed to one end of the carbon fiber tube (3) through the first fixing component (9), and the second metal connector (5) is fixed to the other end of the carbon fiber tube (3) through the second fixing component (10). The carbon fiber tube (3) is limited between the first limiting component (8) and the second limiting component (12). One end of the conductive wire (4) is wrapped around the first conductive wire fixing component (6), and the other end of the conductive wire (4) is wrapped around the second conductive wire fixing component (13).

4. The carbon fiber whip antenna structure according to claim 3, characterized in that, The outer surface of the carbon fiber tube (3) is wrapped with a metal mesh (2).

5. A method for forming a carbon fiber whip antenna, characterized in that, Includes the following steps: [1]: Preparations 1.1) Prepare a first metal connector (1), a second metal connector (5) and a mold. The first metal connector (1) includes a connector (7), a first limiting component (8), a first conductive wire fixing component (6) and a first fixing component (9) connected in sequence. The second metal connector (5) includes a second fixing component (10), a second conductive wire fixing component (13) and a second limiting component (12) connected in sequence. The second limiting component (12) has a connecting hole (11) at the center that matches the shape of the connector (7). The mold is a conventional mold for forming carbon fiber tubes (3) and is a rod-shaped mold with a tapered shape. The mold is pre-treated for demolding. 【2】:Making carbon fiber tubes (3) 2.1) The first metal connector (1) and the second metal connector (5) are respectively set at both ends of the mold, and the first fixing component (9) and the second fixing component (10) are set opposite to each other; 2.2) A first carbon fiber layer is formed by laying carbon fiber prepreg on the surfaces of the first fixing component (9), the mold, and the second fixing component (10); 2.3) A conductive wire (4) is wound around the outside of the first carbon fiber layer to form a conductive wire layer; 2.4) A second carbon fiber layer is formed by laying carbon fiber prepreg on the outside of the conductive wire layer; 2.5) A metal mesh layer is formed by wrapping the surface of the second carbon fiber layer with a metal mesh (2), and the two ends of the metal mesh layer extend to the first limiting member (8) and the second limiting member (12) respectively; 2.6) The metal mesh (2) is wrapped and fixed with conductive wire (4) at the first conductive wire fixing part (6) and the second conductive wire fixing part (13); 2.7) Wrap the first limiting component (8) and the second limiting component (12) with carbon fiber prepreg respectively; 2.8) The carbon fiber prepreg is cured after compaction; [3]: Form carbon fiber whip antenna elements. 3.1) Remove the heat shrink tape, remove the burrs from the surface of the carbon fiber whip antenna, remove the mold, and form the carbon fiber whip antenna unit; [4]: Fabrication of carbon fiber whip antenna. 4.1) A carbon fiber whip antenna, which includes a section of carbon fiber whip antenna element, is formed directly from the carbon fiber whip antenna element. 4.2) A carbon fiber whip antenna consisting of two or more connected carbon fiber whip antenna elements is formed by connecting one carbon fiber whip antenna element to the other carbon fiber whip antenna element through the connector (7) of one carbon fiber whip antenna element and the connector (11) of the other carbon fiber whip antenna element.

6. The carbon fiber whip antenna forming method according to claim 5, characterized in that, The method for laying the carbon fiber prepreg in step 2.2) is as follows: 2.2.1) First, the carbon fiber prepreg is laid along the mold axis, avoiding the first conductive wire fixing component (6) and the second conductive wire fixing component (13). 2.2.2) Stop laying the carbon fiber prepreg when it reaches 2 / 3 of the total thickness of the carbon fiber tube (3).

7. The carbon fiber whip antenna forming method according to claim 6, characterized in that, Step 2.3) includes: 2.3.1) Conductive wire (4) is spirally wound along the mold axis on the surface of carbon fiber prepreg with a pitch of 50-100 mm; 2.3.2) Check if the conductive wire (4) is knotted or broken. If not, proceed to step 2.

4. If so, clean the knotted or broken conductive wire (4) and then proceed to step 2.

3.

8. The carbon fiber whip antenna forming method according to claim 7, characterized in that, The surface of the metal mesh (2) is provided with a resin film.

9. The carbon fiber whip antenna forming method according to claim 8, characterized in that, Step 2.8) includes: 2.8.1) Wrap heat-shrinkable tape around the outer surface of the metal mesh (2); 2.8.2) Pressurize and cure the carbon fiber prepreg.

10. The carbon fiber whip antenna forming method according to claim 9, characterized in that, The resistance of the conductive wire (4) is less than 0.2Ω.

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