Low-loss stationary-phase coaxial radio-frequency cable and manufacturing process thereof

A radio frequency cable, low-loss technology, used in circuits, electrical components, waveguides, etc., can solve the problems of large loss, large phase change, and low frequency of use of the cable, and achieve the purpose of reducing attenuation, offsetting phase change rate, and improving stability. Effect

Inactive Publication Date: 2011-02-23
TIANJIN ASCEND TECH
3 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The frequency of use of the cable is not high, the loss is large, and more importantl...
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Method used

1., silver-plated copper alloy wire core inner conductor 1: adopting diameter is 2.30 ± 0.03mm, silver layer thickness is 4.5 μ m, tensile strength is not less than 200N/mm High strength silver-plated copper alloy wire core is as inner Conductor: High-strength copper alloy is used to improve the stability of the cable and ensure that the conductor changes little during bending and stretching.
4., braiding silver-plated copper wire outer conductor 4: adopting single diameter is 0.15mm, and the silver-plated copper single wire that silver layer thickness is 2 μ m passes through 6 plys, uses 24 metal braiding machines to weave silver-plated copper wire outer conductor 4. The pitch is 21mm...
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Abstract

The invention relates to a low-loss stationary-phase coaxial radio-frequency cable and a manufacturing process thereof. A plurality of layers of microporous polytetrafluoroethylene film insulating layers are wrapped outside the core of a silver-plated copper alloy wire; a silver-plated copper bandlet inner shield is wrapped outside the plurality of microporous polytetrafluoroethylene film insulating layers; a layer of silver-plated copper wire outer conductor is woven outside the silver-plated copper bandlet inner shield; and a layer of fluorinated ethylene propylene jacket is wrapped outside the silver-plated copper wire outer conductor by pressing. The process comprises the following steps of: 1, plating silver on a copper alloy wire in-core conductor; 2, wrapping the microporous polytetrafluoroethylene film insulating layers; 3, wrapping the silver-plated copper bandlet inner shield; 4, weaving the silver-plated copper wire outer conductor; and 5, wrapping the fluorinated ethylene propylene jacket by pressing. The process has the characteristics of reducing the dielectric constant of an insulating medium, reducing the attenuation of the cable and guaranteeing the high shielding efficiency of the cable.

Application Domain

Technology Topic

Radio frequencyFluorinated ethylene propylene +8

Image

  • Low-loss stationary-phase coaxial radio-frequency cable and manufacturing process thereof
  • Low-loss stationary-phase coaxial radio-frequency cable and manufacturing process thereof
  • Low-loss stationary-phase coaxial radio-frequency cable and manufacturing process thereof

Examples

  • Experimental program(1)

Example Embodiment

[0015] Such as figure 1 As shown, a low-loss and stable coaxial radio frequency cable has several layers of microporous PTFE film insulation layer 2 wrapped around a silver-plated copper alloy core 1 and several layers of microporous PTFE film insulation layer 2 The inner shield 3 is wrapped with a silver-plated copper ribbon, and a layer of silver-plated copper outer conductor 4 is braided on the outer shield 3 of the silver-plated copper ribbon. A layer of PTFE is extruded outside the silver-plated copper outer conductor 4 Set of 5. There are nine layers of microporous polytetrafluoroethylene film insulation layer 2.
[0016] A low-loss and stable coaxial RF cable manufacturing process. The manufacturing process steps of the cable are as follows:
[0017] ①. Silver-plated copper alloy core inner conductor 1: adopts a diameter of 2.30±0.03mm, a silver layer thickness of 4.5μm, and a tensile strength of not less than 200N/mm 2 The high-strength silver-plated copper alloy core is used as the inner conductor; the high-strength copper alloy is used to improve the stability of the cable and ensure that the conductor changes little during the bending and stretching process.
[0018] ②. Wrapped microporous PTFE film insulation layer 2: Use a precision wrapping machine to wrap several layers of microporous PTFE film insulation layer 2 outside the inner conductor 1 of the silver-plated copper alloy core, in order to make the insulation uniformity When wrapping, the microporous PTFE film cover is combined with 50% and 0% cover. This cable has nine layers of microporous PTFE film insulation layer 3, the specific data are as follows:
[0019]
[0020] This type of multi-layer wrapping reduces the influence of the cable on the whole due to the unevenness of one layer; at the same time, the overlap rate is between 0% and 50%, which reduces the error rate of the overlap during the processing. Ensure the consistency of the insulation layer; use 50% overlap on both sides to ensure the compactness of the cable. The outer diameter of the microporous PTFE film insulation layer 2 is 6.30mm;
[0021] ③, wrapped silver-plated copper flat tape inner shield 3: In order to improve the shielding efficiency of the product and ensure the stability of the cable structure, a wrapping machine is used outside the microporous PTFE film insulation layer 2. The wrapping width is 3.80mm and the thickness Silver-plated copper ribbon with a thickness of 0.08mm and a silver layer of 1.5μm, the wrapping pitch is 1.9mm, the direction S, the overlap rate is 50%;
[0022] ④. Braided silver-plated copper wire outer conductor 4: a single silver-plated copper single wire with a diameter of 0.15mm and a silver layer thickness of 2μm is passed through 6 strands, and the outer conductor 4 of the silver-plated copper wire is braided using a 24 ingot metal braiding machine. The pitch is 21mm, the braiding density is greater than 90%, and the outer diameter of the outer conductor 4 of the silver-plated copper wire after braiding is 7.30mm; this ensures the stability of the inner shielding layer and improves the softness of the product.
[0023] ⑤. Extrusion of FEP sheath 5, outside the silver-plated copper wire outer conductor 4, the use of excellent performance FEP material, use high temperature extruder to melt extrude FEP sheath 5 , The nominal outer diameter of the polyperfluoroethylene propylene sheath 5 is 7.9mm.
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PUM

PropertyMeasurementUnit
Thickness4.5µm
Tensile strength>= 200.0N/mm²
Outer diameter6.3mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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