Method for manufacturing radio frequency coaxial cable and wrapping equipment used therefor

Abstract

The invention provides a radio frequency coaxial cable manufacturing method and a used wrapping device, which relate to the field of radio frequency coaxial cable manufacturing. The manufacturing method comprises steps: an inner conductor is provided; a dielectric layer is formed on the inner conductor; an outer conductor layer is formed on the dielectric layer; a shielding layer is formed on theouter conductor layer; and a sheath is formed on the shielding layer. The step of forming the outer conductor layer on the dielectric layer comprises substeps: an outer conductor winding tape is woundon the dielectric layer at a constant winding speed; and in the case of winding, the wound object is pulled at a pulling speed of V0+Vt, wherein the V0 is a set constant speed, the Vt is a random speed changing along with the time, and 1%V0< / =|Vt|max< / =20%V0. When the outer conductor layer is formed by winding, the wound object is pulled at the pulling speed of V0+Vt, the pulling speed changes randomly along with the time on the basis of the constant speed V0, and the voltage standing wave ratio peak of the radio frequency coaxial cable can be eliminated.

Description

technical field [0001] The invention relates to the field of manufacturing radio frequency coaxial cables, in particular to a method for manufacturing radio frequency coaxial cables and wrapping equipment used therefor. Background technique [0002] The voltage standing wave ratio is the sum of the reflected signals caused by impedance mismatch when transmitting radio frequency signals. The voltage standing wave ratio is an important performance index to measure the reflection characteristics of the radio frequency coaxial cable. The level of the voltage standing wave ratio directly determines the quality level of the radio frequency coaxial cable. [0003] In the manufacturing process of RF coaxial cables, the "wrapping" method is usually used to wind the cable's outer conductor wrapping tape on the dielectric layer or wrap the cable's dielectric wrapping tape on the inner conductor. This winding process is usually done by cable wrapping equipment. figure 1 A schematic di...

AI Technical Summary

Problems solved by technology

[0004] When transmitting radio frequency signals, the reflection caused by impedance mismatch will be periodically superimposed on a fixed frequency, so that the VSWR will have a high peak at certain frequencies, which will affect the performance of the cable

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