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CN-224217693-U - Composite radio frequency coaxial cable

CN224217693UCN 224217693 UCN224217693 UCN 224217693UCN-224217693-U

Abstract

The utility model relates to a composite radio frequency coaxial cable. The optical fiber cable comprises an inner conductor, an optical fiber, an insulating layer, a shielding layer and a sheath layer, wherein the inner conductor is of a spiral tubular structure, the optical fiber is embedded in the inner conductor, optical fiber filling ointment is filled between the optical fiber and the inner conductor, the insulating layer is arranged on the outer side of the inner conductor, the shielding layer is arranged on the outer side of the insulating layer, and the sheath layer is arranged on the outer side of the shielding layer. The utility model enables the optical cable and the radio frequency coaxial cable to be in an integrated structure, can simultaneously transmit light waves and radio frequency signals, combines the advantages of the radio frequency coaxial cable structure and the optical cable transmission performance, solves the problems of easy damage, signal interference, low construction efficiency, poor compatibility with the existing system and the like of the optical cable in the prior art, realizes the efficient and stable transmission of the light waves and the radio frequency signals, and simultaneously reduces the construction cost and the difficulty.

Inventors

  • WU FULIANG
  • GU DONGMING
  • JIANG QI

Assignees

  • 江苏俊知技术有限公司

Dates

Publication Date
20260508
Application Date
20250424

Claims (10)

  1. 1. A composite radio frequency coaxial cable comprising: an inner conductor (2) having a spiral tubular structure; An optical fiber (1) embedded in the inner conductor (2), and an optical fiber filling ointment filled between the optical fiber and the inner conductor (2); An insulating layer (3) provided outside the inner conductor (2); a shielding layer (4) arranged outside the insulating layer (3); and the sheath layer (5) is arranged outside the shielding layer (4).
  2. 2. A composite radio frequency coaxial cable according to claim 1 wherein the inner conductor (2) is a helically tubular structure formed by embossing after welding from a metal strip.
  3. 3. The composite rf coaxial cable of claim 2, wherein the metal strip material comprises one of copper, aluminum alloy, or copper alloy.
  4. 4. A composite radio frequency coaxial cable according to claim 2 or 3, wherein said metal strip has a thickness of 0.1-0.3mm.
  5. 5. A composite radio frequency coaxial cable according to claim 4 wherein the embossing pitch of the inner conductor (2) is 3-10mm and the embossing peak and trough tolerance is within ±0.5 mm.
  6. 6. A composite radio frequency coaxial cable according to claim 1, characterized in that the gap between the inner diameter of the inner conductor (2) and the outer diameter of the optical fiber (1) is 1-10mm.
  7. 7. A composite radio frequency coaxial cable according to claim 1, characterized in that the thickness of the insulating layer (3) is 1-10mm, comprising polytetrafluoroethylene, polyethylene or foamed polyethylene.
  8. 8. The composite radio frequency coaxial cable according to claim 1, wherein the shielding efficiency of the shielding layer (4) is more than or equal to 100dB, and the shielding layer comprises an aluminum foil shielding layer (4), a copper foil shielding layer (4), a metal mesh layer or a metal shielding layer (4) with an embossed structure.
  9. 9. A composite radio frequency coaxial cable according to claim 1, wherein the thickness of the sheath layer (5) is 1-3mm, and the sheath layer comprises low smoke halogen-free polyolefin.
  10. 10. A composite radio frequency coaxial cable according to claim 1, wherein the optical fiber (1) comprises a single mode fiber, a multimode fiber, a fiber bundle tube, a semi-finished cable or a finished cable.

Description

Composite radio frequency coaxial cable Technical Field The utility model relates to the technical field of communication cables, in particular to a composite radio frequency coaxial cable. Background With the rapid development of communication technologies, particularly 5G networks, the demand for high bandwidth, high reliability signaling by communication systems is increasing. In various application scenarios, such as 5G base station construction, intelligent building communication systems, etc., it is often necessary to transmit optical signals and radio frequency signals simultaneously. In the prior art, a mode of respectively laying an optical cable and a radio frequency coaxial cable is generally adopted to realize double-signal transmission, but the following obvious defects exist: The separated arrangement of the optical cable and the radio frequency cable leads to the complex structure of the wiring system, large occupied space, complicated construction process, increased construction period and labor cost, and difficult arrangement especially in places with limited space. In practical engineering application, the optical cable is relatively low in mechanical strength, so that the optical cable is easy to damage due to bending, pressing and other external forces in the laying or running process, and the transmission stability of optical signals is further affected. And moreover, the optical fiber and the radio frequency coaxial cable are integrated in a single sheath in part of the existing photoelectric composite cable, but the optical fiber and the radio frequency coaxial cable have the problem of mutual interference of optical signals and electric signals due to unreasonable structural design, and the mechanical protection measures of the optical fiber are insufficient, so that the optical fiber is difficult to resist external impact and bending under a complex environment. In addition, some composite cables have larger difference with standard radio frequency coaxial cables in structural dimension, are difficult to be compatible with the existing communication system, and the original equipment is required to be adapted and modified, so that the system modification cost and the technical implementation difficulty are further improved. The traditional photoelectric composite cable technical scheme mainly comprises the following structural modes that firstly, optical fibers and radio frequency cables are completely separated and laid, and secondly, the optical fibers and the radio frequency cables are stranded and arranged in the same sheath. However, these solutions have the following drawbacks: The optical signal and the radio frequency signal are transmitted through independent transmission units respectively, are easily influenced by external electromagnetic interference when distributed in a space adjacent mode, and particularly have larger influence on photosensitive elements in the optical receiving module; The optical fiber body has strong brittleness, and is extremely easy to generate microbending, crack and even break fiber particularly in the scene of crossing building gaps, bending and laying or high-frequency vibration, thereby seriously affecting the communication quality; The cable with the photoelectric split or multi-core structure has larger overall outer diameter, and is not beneficial to flexible wiring in a space-limited environment. Disclosure of Invention Therefore, the composite radio frequency coaxial cable provided by the utility model has the advantages that the optical cable and the radio frequency coaxial cable are of an integrated structure, the optical wave and the radio frequency signal can be transmitted simultaneously, the advantages of the radio frequency coaxial cable structure and the optical cable transmission performance are combined, the problems that the optical cable is easy to damage, the signal is interfered, the construction efficiency is low, the compatibility with the existing system is poor and the like in the prior art are solved, the efficient and stable transmission of the optical wave and the radio frequency signal is realized, and the construction cost and the difficulty are reduced. In order to solve the above technical problems, the present utility model provides a composite radio frequency coaxial cable, including: The inner conductor is of a spiral tubular structure; the optical fiber is embedded in the inner conductor, and an optical fiber filling ointment is filled between the optical fiber and the inner conductor; an insulating layer disposed outside the inner conductor; the shielding layer is arranged outside the insulating layer; The sheath layer is arranged on the outer side of the shielding layer. In one embodiment of the present utility model, the inner conductor is a spiral tubular structure formed by embossing after being welded by a metal strip. In one embodiment of the present utility model, the material of the metal strip incl