The CCA conductor and BC conductor in coaxial cable (part two)
Because aluminum has poorer conductivity than copper, the DC resistance of copper clad aluminum conductor than pure copper conductor, this has no effect mainly depends on whether the cable will be used to provide power supply, such as amplifier, if used to power, copper clad aluminum conductor will lead to additional power consumption, lower voltage more. When the frequency exceeds 5MHz, there is no obvious difference between the attenuation of the AC resistance at this time under these two different conductors. Of course, this is mainly because of the skin effect of high-frequency current, the higher the frequency, the current flow is close to the conductor surface, on the surface of copper clad aluminum conductor in pure copper material, when the frequency is higher than a certain time, the current flowing in the plating copper material. In the case of 5MHz, the current flow in the near surface of about 0.025 mm in thickness, and the thickness of the copper copper clad aluminum conductor than the thickness of about one times. For coaxial cable, because the transmission of the signal is above 5MHz, so the copper clad aluminum conductor and copper conductor transmission effect is the same. The attenuation of the actual test cable can prove this point.
Copper clad aluminum copper conductors is soft, easy in the production process of straightening treatment, so to a certain extent by cable than copper clad aluminum cable with copper conductor return loss index.