CN207752805U - Resistant to bending steady phase radio-frequency cable - Google Patents

Abstract

The utility model is related to field of cables, especially resistant to bending steady phase radio-frequency cable.The cable includes center conductor, dielectric layer, outer conductor layer, middle layer, shielded layer and restrictive coating, center conductor is wrapped in dielectric layer, dielectric layer is wrapped in outer conductor layer, it is wrapped in middle layer in outer conductor layer, middle layer is wrapped in shielded layer, shielded layer is wrapped in restrictive coating, and the center conductor is wrapped in fluoroplastic layer.The utility model is on the basis of ensureing original radio-frequency cable performance indicator; by squeezing out one layer of FEP insulating layer on center conductor surface; the lay configuration and pitch of inner conductors play a protective effect; so as to avoid the variation of cable caused structure and pitch in bending, attenuation stability of the cable in bending ensure that.

Description

Resistant to bending steady phase radio-frequency cable

Technical field

The utility model is related to field of cables, especially resistant to bending steady phase radio-frequency cable.

Background technology

In the radio frequency communications field, especially in electricity such as phased array radar, radio telescope and vector network analyzers The connecting line of sub- equipment, due to needing frequent movement and bending, so the flexibility and phase to the radio-frequency cable of connection Stability proposes very high requirement.And to reach this requirement, typically using twisted silver-plated copper conductor come as interior Conductor uses, and stranded conductor drawback of maximum compared with solid conductor is that the presence because of stranding distance, conductor exist Internal stress can lead to the twisting pitch product variations of conductor, and then the decaying of product also will produce after bending product back and forth Prodigious variation, and for the equipment of terminal, this variation is unacceptable.

Utility model content

The technical problems to be solved in the utility model is：In order to solve existing center conductor because being easy after bending repeatedly The deficiency of decaying, the utility model provide a kind of resistant to bending steady phase radio-frequency cable, refer in the original radio-frequency cable performance of guarantee On the basis of target, by squeezing out one layer of FEP insulating layer on center conductor surface, the lay configuration and pitch of inner conductors play One protective effect ensure that cable in bending so as to avoid the variation of cable caused structure and pitch in bending Attenuation stability.

Technical solution adopted by the utility model to solve its technical problems is：

A kind of resistant to bending steady phase radio-frequency cable, including center conductor, dielectric layer, outer conductor layer, middle layer, shielded layer and Restrictive coating, center conductor are wrapped in dielectric layer, and dielectric layer is wrapped in outer conductor layer, and middle layer is wrapped in outer conductor layer Interior, middle layer is wrapped in shielded layer, and shielded layer is wrapped in restrictive coating, and the center conductor is wrapped in fluoroplastic layer.

Specifically, the fluoroplastic layer thickness is 5um~10um.

Specifically, the fluoroplastic layer material is FEP.

The utility model has the beneficial effects that：The utility model provides a kind of resistant to bending steady phase radio-frequency cable, is protecting On the basis of demonstrate,proving original radio-frequency cable performance indicator, by squeezing out one layer of FEP insulating layer on center conductor surface, inner conductors Lay configuration and pitch play a protective effect, so as to avoid the change of cable caused structure and pitch in bending Change, ensure that attenuation stability of the cable in bending.

Description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model；

1. center conductor in figure, 2. fluoroplastic layers, 3. dielectric layers, 4. outer conductor layers, 5. middle layers, 6. shielded layers, 7. shields Jacket layer.

Specific implementation mode

The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram, Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.

Fig. 1 is the structural schematic diagram of the utility model.

A kind of resistant to bending steady phase radio-frequency cable, including center conductor 1, dielectric layer 3, outer conductor layer 4, middle layer 5, shielding Layer 6 and restrictive coating 7, center conductor 1 are wrapped in dielectric layer 3, and dielectric layer 3 is wrapped in outer conductor layer 4, packet in outer conductor layer 4 It is rolled in middle layer 5, middle layer 5 is wrapped in shielded layer 6, and shielded layer 6 is wrapped in restrictive coating 7, and the center conductor 1 wraps up In fluoroplastic layer 2.2 thickness of the fluoroplastic layer is 5um~10um.2 material of the fluoroplastic layer is FEP.

As shown in Fig. 1, center conductor 1 not only can guarantee the intensity of center conductor 1, but also energy using twisted metallic cable Achieve the purpose that improve center conductor hardness.

For dielectric layer 3 using fluoropolymer as dielectric layer, this material can ensure the physical and chemical performance of stabilizer pole and resistance to Hot property.

Outer conductor layer 4 uses metal tape to weave either lapping structure such as the conventional naked copper as conductive material or silver-plated Copper strips weaves or is used as on dielectric layer conductor layer.

For middle layer 5 using fluoropolymer as dielectric layer, this material can ensure the physical and chemical performance of stabilizer pole and resistance to Hot property.

Shielded layer 6 is woven using the braiding structure of wire, such as conventional naked copper or silver-plated copper as conductive material.

Using polyurethane as restrictive coating, this material can ensure high flexibility and stablize physico restrictive coating 7 Learn performance.

Center conductor 1 primarily serves the effect of signal transduction, is the carrier of signal transmission.Conductor is electric wire product Main component.Electric wire major function is for stream and the electromagnetic wave information of conducting electricity, and electric current and electromagnetic wave information can only pass through Conductor conveys.Conductor is the most basic essential main structure that product carries out electric current or electromagnetic wave information transfer function Part.

On the one hand the fluoroplastic layer 2 of extrusion is to play the role of medium, on the other hand play protection and be twisted center conductor 1 Structure prevents 1 structure of center conductor of product conductor during distortion from generating variation.

Dielectric layer 3, it is ensured that electric current or electromagnetic wave, the light wave of transmission are advanced only along conductor outside without flowing to, on conductor The current potential (potential difference, the i.e. voltage formed to surrounding objects) having can be isolated, i.e., should ensure the normal transmission of conducting wire Function ensures the safety of external object and the person again.

Outer conductor layer 4, it is not only as a conducting wire for transmitting circuit, but also has shielding action, can shield own signal Leakage and external signal interference.

Middle layer 5 ensures the stability of cable attenuation, especially can guarantee that cable also possesses in the case where cable shakes Stabilising decay amplitude coincidence.

Cable internal protection is got up by metal wire knitted, primarily serves and protect inside cable from external force by shielded layer 6 Effect, while again have shielding action, the leakage of own signal and the interference of external signal can be shielded.

Restrictive coating 7, the protective case mainly made of polyurethane material, general utility functions are fire-resistant waterproof etc..This material simultaneously Material has splendid flexibility and wearability, can be used in the occasion for having particular/special requirement.

The utility model ensures attenuation stability of the cable in bending.Increase on the basis of the center conductor 1 of this structure One of fluoroplastic layer 2, by the structure of conductor and pitch stability protection on the basis of not influencing conductor performance, and such as Without this layer of protective layer, the structure that subsequent dielectric layer 3 can be twisted center conductor 1 itself when wrapped impacts fruit, makes The pitch of center conductor 1 generates variation, and then influences the decaying of cable product.

Ensure other performances.After having added this layer of fluoroplastic layer 2, the physical property of conductor itself does not receive influence, because It is to belong to same major class product for this road fluoroplastics of extrusion and the fluoropolymer of dielectric layer, the dielectric number of fields of itself and physical Can be also all very close, product others electric property is not also influenced in this way.

It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model Member can carry out various changes and amendments in the range of without departing from this item utility model technological thought completely.This item is real It is not limited to the contents of the specification with novel technical scope, it is necessary to which its technology is determined according to right Property range.

Claims (3)

1. a kind of resistant to bending steady phase radio-frequency cable, including center conductor (1), dielectric layer (3), outer conductor layer (4), middle layer (5), shielded layer (6) and restrictive coating (7), center conductor (1) are wrapped in dielectric layer (3), and dielectric layer (3) is wrapped in outer conductor layer (4) it in, is wrapped in outer conductor layer (4) in middle layer (5), middle layer (5) is wrapped in shielded layer (6), shielded layer (6) package In restrictive coating (7), characterized in that the center conductor (1) is wrapped in fluoroplastic layer (2).

2. resistant to bending steady phase radio-frequency cable according to claim 1, it is characterised in that：Fluoroplastic layer (2) thickness For 5um~10um.

3. resistant to bending steady phase radio-frequency cable according to claim 1 or 2, it is characterised in that：Fluoroplastic layer (2) material Matter is FEP.