CN201274197Y - High frequency coaxial cable - Google Patents

Abstract

The utility model relates to the filed of telecommunication transmission. The technical problem to be solved is to provide a high-frequency coaxial cable which has reasonable structure and can be applied in the range of higher frequency. The high-frequency coaxial cable is characterized in that a solid-core polyfluortetraethylene insulating layer is extruded and wrapped on the outer surface of an inner conductor; an outer conductor consists of a silver-coated copper strip layer and a silver-coated copper wire braid layer which are compounded; the silver-coated copper strip layer is of a wrap structure; the silver-coated copper wire braid layer is wrapped on the outer surface of the silver-coated copper strip layer. The coaxial cable can realizes the performance indexes of less cable attenuation and standing wave, and good bending flexibility, better electronic radiation resistance and good shielding performance.

Description

A high frequency coaxial cable

Technical field:

The utility model relates to the field of telecommunication transmission.

Background technique:

In the field of telecommunications transmission line manufacturing, the main structure of coaxial transmission lines for high-frequency electrical signals generally adopts:

1. Single-wire inner conductor + semi-air (PE) insulation + bare copper wire braiding form;

2. Stranded inner conductor + semi-air (PE) insulation + silver-plated (tin) copper wire braiding;

3. Single-wire inner conductor + solid core (PTFE) insulation + silver-plated flat copper wire braiding;

4. The overall copper tube semi-rigid structure;

5. Argon arc welding corrugated copper tube structure.

However, due to the continuous increase in the frequency of use required in the field of telecommunications, the requirements for cable losses are getting smaller and higher, and the requirements for shielding are getting higher and higher. The existing structures of these high-frequency coaxial transmission lines cannot meet the needs of development.

Invention content:

The technical problem to be solved by the utility model is to provide a high-frequency coaxial cable, which has a reasonable structure and can meet the application of the coaxial cable in a higher frequency range.

In order to achieve the above purpose, the utility model is achieved through the following technical solutions:

A high-frequency coaxial cable, which is composed of a coaxial inner conductor, an insulating layer, an outer conductor, and a sheath layer from the inside to the outside; Vinyl fluoride insulation layer; the outer conductor is composed of a silver-plated copper tape layer and a silver-plated copper wire braid layer, the silver-plated copper tape layer is a wrapping structure, and the silver-plated copper wire braid layer is covered with a silver-plated copper wire braid layer The outer surface of the copper tape layer.

The inner conductor is a silver-plated copper wire.

The sheath layer is a polytetrachlorethylene sheath.

The utility model brings the following beneficial effects:

1) The surface of a single silver-plated copper wire can be processed very smooth, it has extremely low cable loss, and is one of the most stable structures of the cable.

2) The external size of the outer surface of the solid PTFE can be controlled very precisely. PTFE has excellent electrical properties and high and low temperature resistance.

3) The softness of the outer conductor wrapped by the silver-plated copper tape is better, and the silver-plated copper wire braid can increase the stability of the cable structure, which is more convenient for the bending of the cable and makes the cable more flexible.

4) The polytetrachlorethylene sheath (FEP) can withstand high temperature of 200°C and improve the transmission power. The FEP material is relatively soft, and the surface can be processed very clean and smooth.

Therefore, the coaxial cable made by the utility model can realize the following performance indicators: reduced cable attenuation, reduced standing wave of the cable, good bending flexibility, good resistance to electronic radiation, and excellent shielding performance.

Description of drawings:

Fig. 1: Structural schematic diagram of a specific embodiment of the utility model

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

See Figure 1, in which 1 is the inner conductor of the silver-plated copper wire; 2 is the solid-core polytetrafluoroethylene insulation layer; 3 is the outer conductor, and the outer conductor 3 is wrapped by a silver-plated copper tape 31 and a silver-plated copper wire braid 32 are composed together; 4 is the polytetrachlorethylene sheath layer.

In this embodiment, the high-precision coaxial cable made of silver-plated copper tape wrapping and silver-plated copper wire braided outer conductor can make the cable surface very fine and reliable, the process deviation is extremely small, and the impedance uniformity of the cable is greatly improved. Silver-plated copper tape wrapping is not only reliable, but also the outer conductor after high-precision braiding is very flexible, and the cable produced can achieve good shielding attenuation, small voltage standing wave ratio, and reliable transmission attenuation.

Moreover, the softness of this embodiment can fully meet the design requirements. The cable is bent 5 times on a circle with a radius of 15 mm without conductor breakage, and the shape of the cable is bent once on a circle with a radius of 10 mm without any influence on electrical performance.

Claims (3)

1. A high-frequency coaxial cable, which is composed of a coaxial inner conductor, an insulating layer, an outer conductor, and a sheath layer from the inside to the outside; it is characterized in that: the outer surface of the inner conductor is pushed and coated with a solid core Polytetrafluoroethylene insulation layer; the outer conductor is composed of a silver-plated copper tape layer and a silver-plated copper wire braid layer, the silver-plated copper tape layer is a wrapping structure, and the silver-plated copper wire braid layer is wrapped in Silver-plated copper tape layer outer surface. 2. A high-frequency coaxial cable according to claim 1, wherein the inner conductor is a silver-plated copper wire. 3. A high-frequency coaxial cable according to claim 1 or 2, characterized in that: the sheath layer is a polytetrachlorethylene sheath.