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CN-116505223-B - Carbon fiber whip antenna structure and forming method

CN116505223BCN 116505223 BCN116505223 BCN 116505223BCN-116505223-B

Abstract

The invention relates to the technical field of whip antennas, in particular to a carbon fiber whip antenna structure and a forming method. The traditional carbon fiber whip antenna has poor conduction performance, larger resistance value and low radiation efficiency. The carbon fiber whip antenna structure comprises a first metal joint, a carbon fiber tube, a second metal joint and a conductive wire connecting the two metal joints. The forming method comprises the steps of installing a first metal joint and a second metal joint at two ends of a die, paving carbon fiber prepreg, winding conductive wires, paving the carbon fiber prepreg again, wrapping the outer surface of an antenna by using a metal net, winding and fixing the metal net by using the conductive wires, winding the joints of the metal net and the first metal joint and the second metal joint by using the carbon fiber prepreg, compacting and solidifying, and demolding. The carbon fiber whip antenna disclosed by the invention has the advantages of good conduction performance, small resistance value, high resistance radiation efficiency, light structural mass, excellent mechanical property, fatigue resistance, corrosion resistance, high bearing power, high radiation efficiency, long service life and high workpiece efficiency.

Inventors

  • ZHENG WENCUI
  • XU FEN
  • YAN WEI
  • CHENG LEI
  • YANG AIMEI

Assignees

  • 陕西天翌科技股份有限公司

Dates

Publication Date
20260508
Application Date
20230216

Claims (10)

  1. 1. The carbon fiber whip antenna structure is characterized by comprising a section of carbon fiber whip antenna unit, wherein the carbon fiber whip antenna unit comprises a first metal joint (1), a carbon fiber tube (3), a conductive wire (4) and a second metal joint (5), the first metal joint (1) and the second metal joint (5) are respectively fixed at two ends of the carbon fiber tube (3), the carbon fiber tube (3) comprises a first carbon fiber layer and a second carbon fiber layer, the conductive wire (4) is positioned between the first carbon fiber layer and the second carbon fiber layer, two ends of the conductive wire (4) extend out of the tube wall of the carbon fiber tube (3), and the first metal joint (1) and the second metal joint (5) are connected through two ends of the conductive wire (4).
  2. 2. The carbon fiber whip antenna structure according to claim 1, comprising two or more sections of carbon fiber whip antenna units, wherein the carbon fiber whip antenna units comprise a first metal joint (1), a carbon fiber tube (3), a conductive wire (4) and a second metal joint (5), the first metal joint (1) and the second metal joint (5) are respectively fixed at two ends of the carbon fiber tube (3), the carbon fiber tube (3) comprises a first carbon fiber layer and a second carbon fiber layer, the conductive wire (4) is positioned between the first carbon fiber layer and the second carbon fiber layer, two ends of the conductive wire (4) extend out of the tube wall of the carbon fiber tube (3), the first metal joint (1) and the second metal joint (5) are connected through two ends of the conductive wire (4), and the first metal joint (1) of one section of the carbon fiber whip antenna unit is connected with the second metal joint (5) of the other section of the carbon fiber whip antenna unit.
  3. 3. The carbon fiber whip antenna structure according to claim 1 or 2, wherein the first metal joint (1) comprises a connector (7), a first limiting part (8), a first conductive wire fixing part (6) and a first fixing part (9) which are sequentially connected, the second metal joint (5) comprises a second fixing part (10), a second conductive wire fixing part (13) and a second limiting part (12) which are sequentially connected, a connecting hole (11) matched with the connector (7) in shape is formed in the center of the second limiting part (12), the first metal joint (1) is fixed with one end of a carbon fiber tube (3) through the first fixing part (9), the second metal joint (5) is fixed with the other end of the carbon fiber tube (3) through the second fixing part (10), the carbon fiber tube (3) is limited between the first limiting part (8) and the second limiting part (12), the conductive wire (4) is wound on the first conductive wire fixing part (6), and the other end of the conductive wire (4) is wound on the second conductive wire fixing part (13).
  4. 4. A carbon fiber whip antenna structure according to claim 3, wherein the outer surface of the carbon fiber tube (3) is wrapped with a metal mesh (2).
  5. 5. The carbon fiber whip antenna forming method is characterized by comprising the following steps of: 【1】 The preparation work is carried out, 1.1 Preparing a first metal joint (1), a second metal joint (5) and a die, wherein the first metal joint (1) comprises a connector (7), a first limiting part (8), a first conductive wire fixing part (6) and a first fixing part (9) which are sequentially connected, the second metal joint (5) comprises a second fixing part (10), a second conductive wire fixing part (13) and a second limiting part (12) which are sequentially connected, a connecting hole (11) matched with the connector (7) in shape is formed in the center of the second limiting part (12), the die is a conventional die for forming a carbon fiber tube (3), the shape of the die is a bar with taper, and the die is subjected to demoulding pretreatment; 【2】 The carbon fiber tube (3) is manufactured, 2.1 The first metal joint (1) and the second metal joint (5) are respectively arranged at two ends of the die, and the first fixing part (9) and the second fixing part (10) are oppositely arranged; 2.2 A carbon fiber prepreg is paved on the surfaces of the first fixing part (9), the die and the second fixing part (10) to form a first carbon fiber layer; 2.3 Winding a conductive wire (4) outside the first carbon fiber layer to form a conductive wire layer; 2.4 Spreading carbon fiber prepreg outside the conductive wire layer to form a second carbon fiber layer; 2.5 Wrapping the surface of the second carbon fiber layer by using a metal net (2) to form a metal net layer, wherein two ends of the metal net layer extend to the first limiting part (8) and the second limiting part (12) respectively; 2.6 The metal mesh (2) is wound and fixed by the conductive wires (4) at the first conductive wire fixing part (6) and the second conductive wire fixing part (13) respectively; 2.7 Winding the first limit part (8) and the second limit part (12) with carbon fiber prepreg respectively; 2.8 Compacting and then curing the carbon fiber prepreg; 【3】 A carbon fiber whip antenna unit is formed, 3.1 Removing the heat shrinkage belt, removing burrs on the surface of the carbon fiber whip antenna, and taking out the die to form a carbon fiber whip antenna unit; 【4】 The manufacturing method comprises the steps of manufacturing a carbon fiber whip antenna, 4.1 A carbon fiber whip antenna comprising a length of carbon fiber whip antenna element formed directly from the carbon fiber whip antenna element; 4.2 The carbon fiber whip antenna comprises two or more sections of connected carbon fiber whip antenna units, and the carbon fiber whip antenna is formed by connecting a connector (7) of one section of carbon fiber whip antenna unit with a connecting hole (11) of the other section of carbon fiber whip antenna unit.
  6. 6. The method for forming a carbon fiber whip antenna as claimed in claim 5, wherein the step 2.2) of laying the carbon fiber prepreg comprises the steps of: 2.2.1 Firstly, paving the carbon fiber prepreg along the axial direction of the die, wherein the paving part avoids the first conductive wire fixing part (6) and the second conductive wire fixing part (13); 2.2.2 The carbon fiber prepreg is laid up to 2/3 of the total thickness of the carbon fiber tube (3) and the laying up is stopped.
  7. 7. The method of forming a carbon fiber whip antenna of claim 6, wherein step 2.3) comprises: 2.3.1 The conductive wires (4) are spirally wound on the surface of the carbon fiber prepreg along the axial direction of the die, and the screw pitch is 50-100 mm; 2.3.2 Checking whether the conductive wire (4) has knotting or breakage, if not, executing the step 2.4), and if so, cleaning the knotted or broken conductive wire (4), and then executing the step 2.3).
  8. 8. The method for forming a carbon fiber whip antenna according to claim 7, wherein the metal mesh (2) is provided with a resin film on the surface.
  9. 9. The method of forming a carbon fiber whip antenna of claim 8, wherein step 2.8) comprises: 2.8.1 Wrapping a heat shrinkage belt on the outer surface of the metal net (2); 2.8.2 Pressure curing the carbon fiber prepreg.
  10. 10. The method of forming a carbon fiber whip antenna according to claim 9, wherein the resistance value of the conductive wire (4) is less than 0.2 Ω.

Description

Carbon fiber whip antenna structure and forming method Technical Field The invention relates to the technical field of whip antennas, in particular to a carbon fiber whip antenna structure and a forming method. Background A whip antenna is a flexible vertical rod antenna that is typically 1/4 or 1/2 wavelength long. The whip antenna is a common structural form of a short wave antenna, and is widely applied due to the advantages of simple structure, small volume, omnidirectionality, easy motorized property and the like. The antenna rod forming production method of the whip antenna in the market at present is divided into two general types, wherein the first type is to manufacture an antenna main body by adopting a metal pipe or bar, and the antenna sections are connected in a plugging or threaded connection mode. The second is that the antenna tube is made of carbon fiber, the carbon fiber antenna tube and the metal embedded part are adhered by glue, the conductivity of the surface is ensured by coating conductive glue or conductive paint, and the conductive glue or conductive paint has poor conductivity and the carbon fiber is not conductive, so that the antenna made by the method has the defects of poor conductivity, larger resistance value, reduced radiation efficiency and the like. The whip antenna is often used for mobile communication scenes such as individual soldier radio stations, vehicle radio stations, naval vessel radio stations and the like, so that good conduction performance and high antenna radiation efficiency are required to be pursued under smaller volume and weight, and the existing carbon fiber whip antenna faces the problems of poor conduction performance, large resistance value, reduced radiation efficiency and the like and cannot meet the use requirements. Therefore, a carbon fiber whip antenna with good conduction performance, small resistance and high radiation efficiency is required in the market. Disclosure of Invention In order to solve the problems of poor conduction performance, larger resistance value and reduced radiation efficiency of the prior carbon fiber whip antenna, the invention provides a carbon fiber whip antenna structure and a forming method, and the specific scheme is as follows: the carbon fiber whip antenna structure comprises a section of carbon fiber whip antenna unit, wherein the carbon fiber whip antenna unit comprises a first metal joint, a carbon fiber tube, a conductive wire and a second metal joint, the first metal joint and the second metal joint are respectively fixed at two ends of the carbon fiber tube, a conductive wire main body is buried in the tube wall of the carbon fiber tube, two ends of the conductive wire extend out of the tube wall of the carbon fiber tube, and the first metal joint is connected with the second metal joint through two ends of the conductive wire; Further, the carbon fiber whip antenna structure comprises two or more sections of carbon fiber whip antenna units, wherein each carbon fiber whip antenna unit comprises a first metal joint, a carbon fiber tube, a conductive wire and a second metal joint, the first metal joint and the second metal joint are respectively fixed at two ends of the carbon fiber tube, a conductive wire main body is embedded in the tube wall of the carbon fiber tube, two ends of the conductive wire extend out of the tube wall of the carbon fiber tube, the first metal joint and the second metal joint are connected through two ends of the conductive wire, and the first metal joint of one section of carbon fiber whip antenna unit is connected with the second metal joint of the other section of carbon fiber whip antenna unit; Further, the first metal joint comprises a connector, a first limiting part, a first conductive wire fixing part and a first fixing part which are sequentially connected, the second metal joint comprises a second fixing part, a second conductive wire fixing part and a second limiting part which are sequentially connected, a connecting hole matched with the connector in shape is formed in the center of the second limiting part, the first metal joint is fixed with one end of the carbon fiber tube through the first fixing part, and the second metal joint is fixed with the other end of the carbon fiber tube through the second fixing part; Further, the outer surface of the carbon fiber tube is wrapped with a metal net; The carbon fiber whip antenna forming method comprises the following steps: 【1】 The preparation work is carried out, 1.1 Preparing a first metal joint, a second metal joint and a die, wherein the first metal joint comprises a connector, a first limiting part, a first conductive wire fixing part and a first fixing part which are sequentially connected, the second metal joint comprises a second fixing part, a second conductive wire fixing part and a second limiting part which are sequentially connected, a connecting hole matched with the connector in shape is formed in the cente