Flexible low-phase noise coaxial cable

Abstract

The utility model relates to the technical field of communication engineering, in particular to a flexible low-phase noise coaxial cable, which takes a silver-plated copper conductor as a cable core, and the silver-plated copper conductor is sequentially wrapped by an ePTFE insulating tape, a conductive insulating layer, a silver-plated copper tape shielding layer, a braided shielding layer and a sheath layer from the inner layer to the outer layer; according to the utility model, the conductive insulating layer is added on the basis of the original stable-phase coaxial cable, and a uniform electrode layer is effectively added on the insulating surface of the conductive insulating layer, so that the interference of external electromagnetic signals can be effectively avoided; and meanwhile, the noise phenomenon caused by random change of the phase of the internal signal on the frequency is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication engineering technical field, concretely is a kind of flexible low phase noise coaxial cable. BACKGROUND

[0002] China is vast in area, and the electronic detection demand of frontier early warning radar, investigation radar, fire control radar and so on is extremely urgent.These fields have extremely high performance requirements for cable, especially some extreme environment, due to large diurnal temperature difference, environment is bad, need some frequency band width, phase stable communication cable, stable coaxial cable is widely used due to its large frequency band width, mechanical and temperature phase stability;

[0003] But with the development of electronic equipment, electronic equipment pre-releases precision, phase noise influence is more and more big, directly influence frequency spectrum expansion, signal reception ability drops, phase loss, solving phase noise is urgent demand.General stable coaxial cable cannot prevent phase noise, and market urgently needs a kind of low phase noise stable coaxial cable. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of flexible low phase noise coaxial cable to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of flexible low phase noise coaxial cable, the flexible low phase noise coaxial cable is with silver-plated copper conductor as cable core, the silver-plated copper conductor is successively wrapped by ePTFE insulating tape, conductive insulation layer, silver-plated copper tape shielding layer, braided shielding layer and sheath layer from inner layer to outer layer;The silver-plated copper conductor is silver-plated soft round copper conductor with plating layer 2 μm or more.

[0007] In a preferred embodiment of the utility model, the ePTFE insulating tape is low-density PTFE microporous tape, and the PTFE microporous tape is 0.4-1.0 density microporous tape, and the microporous tape is wrapped around the silver-plated copper conductor.

[0008] In a preferred embodiment of the utility model, the conductive insulation layer is conductive turning tape, which mainly eliminates phase noise in the future, and the conductive insulation layer is wrapped around the ePTFE insulating layer.

[0009] In a preferred embodiment of the utility model, the silver-plated copper tape shielding layer is silver-plated copper tape with a thickness of not less than 0.04 mm.

[0010] In a preferred embodiment of the utility model, the braided shielding layer is silver-plated copper wire with a plating layer of not less than 1.2 μm.

[0011] In a preferred embodiment of the utility model, the sheath layer is a PFA extruded sheath.

[0012] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model.

[0013] Because the change of phase noise is random, it is caused by the nonlinear change of device, temperature change, instability of oscillator and extreme environment, which can cause the signal spectrum expansion of system, signal instability and signal phase loss;

[0014] The cable of the utility model adds conductive insulation layer on the basis of the original stable coaxial cable, and the electric insulation layer effectively adds a uniform electrode layer on the insulation surface, which can effectively avoid the interference of external electromagnetic signals, and avoid the noise phenomenon caused by the random change of internal signal phase in frequency;

[0015] Compared with the ordinary phase coaxial cable, the product can not only realize stable phase transmission, but also can ensure the stability of signal in complex electromagnetic environment and extreme environment, and can be widely used in the early warning border defense radar system of border, and has obvious border defense demand and economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become obvious and easily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a sectional view of a flexible low phase noise coaxial cable.

[0018] In the figure: 1-silver-plated copper conductor; 2-ePTFE insulation belt; 3-conductive insulation layer; 4-silver-plated copper belt shielding layer; 5-woven shielding layer; 6-sheath layer. DETAILED DESCRIPTION

[0019] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0020] Please refer to Figure 1The flexible low phase noise coaxial cable takes the silver-plated copper conductor 1 as a cable core, and the silver-plated copper conductor 1 is wrapped from inside to outside by an ePTFE insulating tape 2, a conductive insulating layer 3, a silver-plated copper tape shielding layer 4, a braided shielding layer 5 and a sheath layer 6; the silver-plated copper conductor 1 is a silver-plated soft round copper conductor with a plating layer of more than 2 microns; the silver-plated soft round copper conductor is twisted by multiple groups of silver-plated filaments;

[0021] The ePTFE insulating tape 2 is a low-density PTFE microporous tape, the PTFE microporous tape is a 0.4-1.0 density microporous tape, preferably a 0.7 density microporous tape, and the microporous tape is wrapped on the silver-plated copper conductor 1; the microporous tape is formed by low-temperature drawing and rolling, the density is guaranteed to be 0.7, and the dielectric constant is guaranteed to be 1.43;

[0022] The conductive insulating layer 3 is a conductive turned tape, the turned tape is formed by sintering and rolling after adding carbon black, has a conductive effect, and mainly eliminates phase noise in the future, and the conductive insulating layer 3 is wrapped on the ePTFE insulating tape 2 insulating layer;

[0023] The silver-plated copper tape shielding layer 4 is a silver-plated copper tape with a thickness of not less than 0.04 mm, guaranteeing the phase stability of the cable;

[0024] The braided shielding layer 5 is a silver-plated copper wire with a plating layer of not less than 1.2 microns, guaranteeing the shielding effect and phase stability of the cable;

[0025] The sheath layer 6 is a PFA extruded sheath;

[0026] The conductive insulating layer is 50% overlapping and is smoothly wrapped on the insulating layer, a low degree of induced current is eliminated, the insulating voltage is guaranteed to be stable, irregular polarization is eliminated, phase jitter is reduced, and low phase noise is guaranteed.

[0027] The working principle of the utility model is that the silver-plated copper conductor 1 is taken as a cable core, the ePTFE insulating tape 2 is a low-density PTFE microporous tape, the microporous tape is formed by low-temperature drawing and rolling, the density is guaranteed to be 0.7, the dielectric constant is guaranteed to be 1.43, the conductive insulating layer 3 is a conductive turned tape, the turned tape is formed by sintering and rolling after adding carbon black, has a conductive effect, and mainly eliminates phase noise in the future, the silver-plated copper tape shielding layer 4 guarantees the phase stability of the cable, the braided shielding layer 5 guarantees the shielding effect and phase stability of the cable, and the sheath layer 6 is a PFA extruded sheath as a protective outer layer.

[0028] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A flexible low phase noise coaxial cable, characterized by: The flexible low phase noise coaxial cable takes silver-plated copper conductor (1) as the core, which is wrapped by ePTFE insulation tape (2), conductive insulation layer (3), silver-plated copper tape shielding layer (4), braided shielding layer (5) and sheath layer (6) from the inner layer to the outer layer; the silver-plated copper conductor (1) is a silver-plated soft round copper conductor with a plating layer of 2 microns or more; the conductive insulation layer (3) is a conductive turning tape, which mainly eliminates phase noise in the future, and the conductive insulation layer (3) is wrapped around the ePTFE insulation tape (2) insulation layer.

2. A flexible low phase noise coaxial cable according to claim 1, wherein, The ePTFE insulation tape (2) is a low-density PTFE microporous tape, and the PTFE microporous tape is a 0.4-1.0 density microporous tape, which is wrapped around the silver-plated copper conductor (1).

3. A flexible low phase noise coaxial cable according to claim 1, wherein, The silver-plated copper tape shielding layer (4) is a silver-plated copper tape with a thickness of not less than 0.04 mm.

4. A flexible low phase noise coaxial cable according to claim 1, wherein, The braided shielding layer (5) is a silver-plated copper wire with a plating layer of not less than 1.2 microns.

5. A flexible low phase noise coaxial cable according to claim 1, wherein, The sheath layer (6) is a PFA extruded sheath.

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