CN212011213U

CN212011213U - Low-loss stable-phase coaxial radio-frequency cable

Info

Publication number: CN212011213U
Application number: CN202020970985.1U
Authority: CN
Inventors: 乔乐佳
Original assignee: Shanghai Qiyue High Temperature Cable Co ltd
Current assignee: Shanghai Qiyue High Temperature Cable Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-11-24
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a low-loss phase-stable coaxial radio frequency cable, which comprises an inner conductor, an insulating layer, an inner shielding layer, an outer shielding layer and a protective sleeve which are arranged from inside to outside in sequence; the utility model sets the insulating layer as a multilayer wrapping structure, and the adjacent layers are connected by the adhesive layer, so that the outer diameter and the insulating constant of the cable are stable; meanwhile, the anti-torque capacity of the cable is further enhanced by the spirally arranged adhesive layer; the stable phase gap is matched and embedded with the silver-plated copper strip of the inner shielding layer, so that the resistance between the insulating layer and the shielding layer is increased, relative displacement is not easy to generate, and the stability is good; the shielding layer is formed by combining the silver-plated copper strip and the silver-plated copper wire braided layer, so that the cable loss is reduced, the shielding efficiency is higher, and meanwhile, the tensile strength of the cable is increased by the high-density braided layer; the lag has higher environmental suitability, and the anti moment of torsion layer of its inlayer has stronger anti moment of torsion ability, and with outer inoxidizing coating cooperation, it is effectual to the protection of cable.

Description

Low-loss stable-phase coaxial radio-frequency cable

Technical Field

The utility model relates to a communication cable field specifically is a steady looks coaxial radio frequency cable of low-loss.

Background

The radio frequency coaxial cable is a cable which is provided with two concentric conductors, and the conductor and the shielding layer share the same axis. The nomenclature of radio frequency coaxial cable is related to its structure. Radio frequency coaxial cable is also one of the most common transmission media in local area networks. A pair of conductors for transmitting information is selected according to a structure that a layer of cylindrical outer conductor is sleeved outside an inner conductor (a thin core), the two conductors are mutually isolated by insulating materials, the centers of the outer conductor and a central axis core wire are on the same axis, so the coaxial cable is called a radio frequency coaxial cable, and the radio frequency coaxial cable is designed in such a way, so the transmission of abnormal signals interfered by external electromagnetic waves is also prevented.

In the practical application of the existing radio frequency coaxial cable, the phase stability of each cladding is poor, and when the cable is subjected to mechanical stress, relative displacement is easily generated between the cladding, so that the stability of phase and attenuation is influenced; meanwhile, the cable is easy to damage due to twisting in use, and the torsion resistance is required to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steady looks coaxial radio frequency cable of low-loss to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a low-loss phase-stable coaxial radio frequency cable comprises an inner conductor, an insulating layer, an inner shielding layer, an outer shielding layer and a protective sleeve which are sequentially arranged from inside to outside; the insulating layer is of a multi-layer wrapping structure and comprises a plurality of film tape layers wrapped outside the inner conductor, an adhesive layer is coated between every two adjacent film tape layers, and the outermost film tape layer is wound to form a phase stabilizing gap of a spiral structure; the inner shielding layer is a silver-plated copper strip, is continuously wrapped outside the insulating layer and is correspondingly embedded into the phase stabilizing gap; the outer shielding layer is formed by weaving a plurality of strands of silver-plated copper wires and is tightly wrapped outside the inner shielding layer; the protective sleeve is of a double-layer structure and comprises an inner anti-torque layer and an outer protective layer.

Preferably, the inner conductor is of a single core structure.

Preferably, the film tape layer is made of an ultra-low density PTFE material and has a dielectric constant of 1.45.

Preferably, the adhesive layer is spirally coated on the surface of the film strip layer.

Preferably, the protective sleeve is made of FEP or PFA material, and the torsion resistant layer is formed by a plurality of torsion resistant strips made of FEP or PFA material, which are overlapped and wound into a spring structure and wrapped on the surface of the outer shielding layer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model sets the insulating layer as a multilayer wrapping structure, and the adjacent layers are connected by the adhesive layer, so that the outer diameter and the insulating constant of the cable are stable; meanwhile, the anti-torque capacity of the cable is further enhanced by the spirally arranged adhesive layer; and, form steady looks clearance at the insulating layer surface around the package, with the silver-plated copper strips adaptation gomphosis of internal shield layer, increased the resistance between insulating layer and the shielding layer, difficult production relative displacement, stability is good.

2. The utility model discloses set up the shielding layer into silver-plated copper strips and silver-plated copper wire weaving layer and combine together, reduce cable loss, shielding efficiency is higher, and the high density weaving layer has increased the tensile strength of cable simultaneously.

3. The protective sleeve is of a double-layer structure and is made of FEP or PFA materials, so that the protective sleeve has high environmental adaptability; the anti-torque layer of the inner layer is of a spring structure formed by overlapping and winding a plurality of anti-torque strips made of FEP or PFA materials, has strong anti-torque capacity, is matched with the outer protective layer, and has good protection effect on the cable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of a specific structure of the insulating layer of the present invention;

fig. 3 is a schematic view of the specific structure of the protecting jacket of the present invention.

In the figure: 1. an inner conductor; 2. an insulating layer; 21. a film tape layer; 22. an adhesive layer; 23. a phase stabilizing gap; 3. an inner shield layer; 4. an outer shield layer; 5. a protective sleeve; 51. a torque resistant layer; 52. and (4) a protective layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a low-loss phase-stable coaxial radio frequency cable comprises an inner conductor 1, an insulating layer 2, an inner shielding layer 3, an outer shielding layer 4 and a protective sleeve 5 which are sequentially arranged from inside to outside; the insulating layer 2 is of a multi-layer wrapping structure and comprises a plurality of film tape layers 21 wrapped outside the inner conductor 1, an adhesive layer 22 is coated between every two adjacent film tape layers 21, and the outermost film tape layer 21 is wound to form a phase stabilizing gap 23 of a spiral structure; the inner shielding layer 3 is a silver-plated copper strip, is continuously wrapped outside the insulating layer 2 and is correspondingly embedded into the phase stabilizing gap 23; the outer shielding layer 4 is formed by weaving a plurality of strands of silver-plated copper wires and is tightly wrapped outside the inner shielding layer 3; the protective sleeve 5 is of a double-layer structure and comprises an inner anti-torque layer 51 and an outer protective layer 52.

Further, the inner conductor 1 is a single core structure.

Further, the film tape layer 21 is made of an ultra-low density PTFE material and has a dielectric constant of 1.45.

Further, the adhesive layer 22 is spirally coated on the surface of the film tape layer 21.

Further, the protective sleeve 5 is made of FEP or PFA, and the torsion resistant layer 51 is formed by a plurality of torsion resistant strips made of FEP or PFA, which are stacked and wound into a spring structure and wrapped on the surface of the outer shielding layer 4.

The insulating layer 2 is arranged to be a multi-layer wrapping structure, and an adhesive layer 22 is coated between two adjacent film tape layers 21, so that the outer diameter and the insulating constant of the cable are stable; meanwhile, the spirally arranged adhesive layer 22 further enhances the torque resistance of the cable; and, form steady looks clearance 23 at insulating layer 2 surface around the package, with the silver-plated copper strips adaptation gomphosis of internal shield layer 3, increased the resistance between insulating layer 2 and the shielding layer, difficult production relative displacement, stability is good. The shielding layer is combined with the silver-plated copper strip and the silver-plated copper wire braided layer, so that the cable loss is reduced, the shielding efficiency is higher, and meanwhile, the tensile strength of the cable is increased by the high-density braided layer. The protective sleeve 5 is of a double-layer structure and is made of FEP or PFA materials, so that the protective sleeve has high environmental adaptability; the anti-torque layer 51 on the inner layer is of a spring structure formed by overlapping and winding a plurality of anti-torque strips made of FEP or PFA materials, has strong anti-torque capacity, is matched with the outer protection 52 layer, and has good protection effect on cables.

The cable of the utility model has the characteristics of high signal transmission rate up to 83 percent, temperature phase stability less than 750PPM, low loss, high shielding efficiency and the like in the aspect of electrical performance; in the aspect of mechanical performance, the cable has better bending property and longer mechanical phase stability due to low-density insulation and copper strip lapping; in the aspect of environmental resistance, the cable is made of raw materials with excellent environmental resistance, so that the cable has the characteristics of wide use temperature range, corrosion resistance, mildew and moisture resistance, flame retardance and the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low-loss phase-stable coaxial radio frequency cable is characterized by comprising an inner conductor (1), an insulating layer (2), an inner shielding layer (3), an outer shielding layer (4) and a protective sleeve (5) which are sequentially arranged from inside to outside; the insulating layer (2) is of a multi-layer wrapping structure and comprises a plurality of film tape layers (21) wrapped outside the inner conductor (1), an adhesive layer (22) is coated between every two adjacent film tape layers (21), and the outermost film tape layer (21) is wound to form a phase stabilizing gap (23) of a spiral structure; the inner shielding layer (3) is a silver-plated copper strip, is continuously wrapped outside the insulating layer (2), and is correspondingly embedded into the phase stabilizing gap (23); the outer shielding layer (4) is formed by weaving a plurality of strands of silver-plated copper wires and is tightly wrapped outside the inner shielding layer (3); the protective sleeve (5) is of a double-layer structure and comprises an inner anti-torque layer (51) and an outer protective layer (52).

2. The low-loss phase-stable coaxial radio-frequency cable according to claim 1, wherein: the inner conductor (1) is of a single-core structure.

3. The low-loss phase-stable coaxial radio-frequency cable according to claim 1, wherein: the membrane tape layer (21) is made of an ultra-low density PTFE material and has a dielectric constant of 1.45.

4. The low-loss phase-stable coaxial radio-frequency cable according to claim 1, wherein: the adhesive layer (22) is spirally coated on the surface of the film belt layer (21).

5. The low-loss phase-stable coaxial radio-frequency cable according to claim 1, wherein: the protective sleeve (5) is made of FEP or PFA materials, and the anti-torque layer (51) is formed by winding a plurality of anti-torque strips made of FEP or PFA materials in an overlapping mode to form a spring structure and wrapping the anti-torque strips on the surface of the outer shielding layer (4).