CN211654340U

CN211654340U - Microwave low-loss phase-stable cable

Info

Publication number: CN211654340U
Application number: CN201921990620.9U
Authority: CN
Inventors: 王万松; 赵彬; 胡光辉
Original assignee: Anhui Guangfu Cable Co ltd
Current assignee: Anhui Guangfu Cable Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-10-09
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a microwave low-loss phase-stable cable, the center of which is an inner conductor formed by twisting a plurality of high-performance silver-plated soft copper wires; a foaming insulating layer is extruded outside the inner conductor, and the foaming insulating layer is formed by high foaming of an improved FEP fluorine material; wrapping a polytetrafluoroethylene microporous film outside the foamed insulating layer to form a wrapping insulating layer, wherein the wrapping insulating layer is formed by overlapping a plurality of layers of wrapping and performing high-low temperature shaping treatment; a layer of silver-plated soft flat copper strips is lapped outside the lapping insulating layer at random pitches in an overlapping mode to serve as a shielding layer, and the random pitches are pitches which periodically fluctuate within a certain range; a layer of silver-plated soft round copper wire is woven outside the shielding layer to form a fastening layer; and extruding and coating a layer of improved fluorinated ethylene propylene material outside the fastening layer to form a sheath layer, thereby forming a final product. The utility model discloses form mainly used communication, trail, alert, electronic countermeasure, navigation etc. system medium-high frequency signal transmission.

Description

Microwave low-loss phase-stable cable

Technical Field

The utility model relates to a wave low-loss stationary phase cable field.

Background

With the rapid development of the fields of communication, tracking, warning, electronic countermeasure, navigation and the like in China, the microwave low-loss phase-stabilizing cable has wider and higher application and higher performance requirements, and is a medium-high frequency signal transmission cable used in systems of communication, tracking, warning, electronic countermeasure, navigation and the like. At present, such high-end products always depend on import, are imitated in China in recent years, all insulation of the high-end products is wrapped by a polytetrafluoroethylene microporous film tape, but the insulation is limited based on domestic materials, equipment and process conditions, such as unstable wrapping tension, non-uniformity of micropores of the wrapping tape, high and low temperature large shrinkage and other factors are difficult to solve, the product performance always breaks through foreign product performance (attenuation, standing-wave ratio, phase stability and amplitude stability), the performance stability is poor, the performance index is greatly drifted or even unqualified after the high and low temperatures, and equipment use is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that realize a convenient manufacturing production to job stabilization is reliable, has the stable looks cable of microwave low-loss of resistant high low temperature performance.

In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a microwave low-loss steady phase cable, the cable has inner conductor, crowded package foaming insulating layer, wraps insulating layer, shielding layer, fastening layer and restrictive coating from inside to outside in proper order.

The inner conductor is formed by stranding a plurality of silver-plated soft copper wires.

The thickness of the silver coating layer of the silver-coated annealed copper wire is more than 2 mu m, and the inner conductor does not contain magnetic conductive material components.

The extrusion-coated foamed insulating layer is formed by foaming an FEP fluorine material.

The wrapping insulating layer is formed by wrapping a polytetrafluoroethylene microporous film outside the extruded foaming insulating layer.

The shielding layer is formed by lapping a layer of silver-plated soft flat copper strips at random pitches.

The fastening layer is formed by weaving a layer outside the silver-plated soft round copper wire.

The sheath layer is made of a fluorinated ethylene propylene material.

Compared with the prior art, the utility model, still have following advantage:

1. the utility model relates to a novel microwave low-loss phase-stable cable. The inner conductor is formed by stranding a plurality of high-performance silver-plated soft copper wires, the thickness of a silver plated layer is more than 2 mu m, and the inner conductor is not allowed to contain other magnetic conductive material components such as nickel, iron and the like.

2. The utility model discloses the insulating layer adopts two kinds of insulating material composite construction, and the internal insulation is FEP material crowded package foaming insulation, and the external insulation is micropore ETFE material film area around the package insulating, and two kinds of materials respectively account for half insulation thickness. The inner layer extruded foaming insulation has extremely low and stable dielectric constant, so that standing-wave ratio is reduced, attenuation is reduced, phase stability and amplitude stability are achieved, performance is more excellent than that of a film belt wound package, but the smaller bending radius of the material can change the dielectric constant of the material, performance stability of the product is affected, the outer diameter of the foaming insulation is reduced, the bending radius is increased relatively, and performance stability is improved. The outer layer wrapping insulation is complementary to the outer diameter of the inner layer extrusion foaming insulation, and compared with the extrusion insulation, due to the fact that uncertain factors such as belt wrapping tension and belt micropore unevenness exist, the performance is better than that of the extrusion foaming insulation and poor stability, but the wrapping structure belt can move, the bending performance is good, the influence on the performance is small, and advantage complementation is achieved.

3. The utility model discloses the shielding layer adopts the soft flat copper strips of silvering to overlap around the package, adopts random pitch around the package, makes to carry out periodic fluctuation at the certain extent around the package pitch, reduces the reflection signal stack, reduces the standing-wave ratio, improves cable transmission performance.

4. The utility model discloses set up the fastening layer outside the shielding layer, adopted the silver-plating fastening more than 95% of density to weave, made the overall structure of product have better stability and compliance to the axial tensile characteristic of cable has been increased.

5. The utility model discloses the crowded package improvement of sheath is gathered to perfluor ethylene propylene material, this material have high low temperature resistant, high fire-retardant, ageing-resistant, corrosion-resistant etc. characteristic, can adapt to harsh external environment requirement.

Drawings

The following brief descriptions of the contents expressed by each figure and the marks in the figures in the specification of the present invention are as follows:

FIG. 1 is a schematic view of a microwave low-loss phase-stabilized cable structure;

the labels in the above figures are: 1. an inner conductor; 2. extruding and wrapping a foamed insulating layer; 3. wrapping an insulating layer; 4. a shielding layer; 5. a fastening layer; 6. a sheath layer.

Detailed Description

The following description of the embodiments with reference to the drawings is provided to explain the embodiments of the present invention in further detail, such as the shapes and structures of the components, the mutual positions and connection relationships among the components, the functions and working principles of the components, the manufacturing process, and the operation and use method, etc., so as to help those skilled in the art to understand the concept and technical solutions of the present invention more completely, accurately and deeply.

The microwave low-loss phase-stabilizing cable is a composite application of insulating materials, realizes the complementary advantages of the structures and the processes of the two insulating materials through the trend toward profit and disadvantage, and constructs a novel microwave low-loss phase-stabilizing cable with improved performance (attenuation, standing-wave ratio, phase stabilization and amplitude stabilization) and high and low temperature resistance.

As shown in fig. 1, the cable is sequentially provided with an inner conductor 1, an extruded foam insulating layer 2, a wrapped insulating layer 3, a shielding layer 4, a fastening layer 5 and a sheath layer 6 from inside to outside.

The inner conductor 1 is formed by twisting a plurality of high-performance silver-plated soft copper wires, the thickness of a silver plated layer is more than 2 mu m, and the inner conductor 1 is not allowed to contain other magnetic conductive material components such as nickel, iron and the like.

The foamed insulating layer 2 is extruded outside the inner conductor 1 and is formed by high foaming of an improved FEP fluorine material, and the FEP high-foaming insulating layer is constructed and has extremely low and stable dielectric constant, so that standing wave ratio is reduced, attenuation is reduced, and phase stability and amplitude stability are achieved.

The method is characterized in that a polytetrafluoroethylene microporous film is wrapped outside a foaming insulating layer to form a wrapping insulating layer 3, the wrapping insulating layer 3 is formed by overlapping multiple layers of wrapping through high-low temperature shaping treatment, microporous tape wrapping insulation is constructed, the dielectric constant and bending flexibility are extremely low, and standing wave and attenuation change caused by aging and repeated bending are remarkably reduced in a full frequency range.

A layer of silver-plated soft flat copper strips is lapped outside the lapping insulating layer 3 at random pitches to serve as a shielding layer 4, wherein the random pitches are pitches which periodically fluctuate within a certain range; the shielding coverage rate can reach 100% through the treatment, the cable is softer, the standing wave ratio is reduced by reducing reflection superposition at random pitches, and the cable has good bending phase stability.

A silver-plated soft round copper wire is woven outside the shielding layer 4 to form a fastening layer 5, and silver-plated fastening weaving with the density of more than 95% is adopted, so that the overall structure of the product has better stability and flexibility, and the axial tensile property of the cable is improved.

The fastening layer 5 is externally extruded with a layer of fluorinated ethylene propylene material as a sheath layer 6 to form a final product, and the fluorinated ethylene propylene material has the characteristics of high and low temperature resistance, high flame retardance, aging resistance, corrosion resistance and the like, and can adapt to harsh external environment requirements.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims

1. Microwave low-loss phase-stable cable, its characterized in that: the cable sequentially comprises an inner conductor, an extruded foam insulating layer, a wrapped insulating layer, a shielding layer, a fastening layer and a sheath layer from inside to outside

The extruded foamed insulating layer is formed by foaming an FEP fluorine material;

2. A microwave low-loss phase-stable cable according to claim 1, characterized in that: the inner conductor is formed by stranding a plurality of silver-plated soft copper wires.

3. A microwave low-loss phase-stable cable according to claim 2, wherein: the thickness of the silver coating layer of the silver-coated annealed copper wire is more than 2 mu m, and the inner conductor does not contain magnetic conductive material components.

4. A microwave low-loss phase-stable cable according to claim 1, characterized in that: the shielding layer is formed by lapping a layer of silver-plated soft flat copper strips at random pitches.

5. A microwave low-loss phase-stable cable according to claim 1, characterized in that: the fastening layer is formed by weaving a layer outside the silver-plated soft round copper wire.

6. A microwave low-loss phase-stable cable according to claim 1, characterized in that: the sheath layer is made of a fluorinated ethylene propylene material.