What is the impedance size of the usb3.0 cable?

As the data line or wire industry knows, the less resistance the customer demands, the better it is to charge or transmit. So what is the impedance size of the usb3.0 cable?

1. Insulated wire diameter: increase of insulated wire diameter - impedance increase; insulation wire diameter is uneven - impedance is uneven.

2. Conductor line diameter: the conductor line diameter increases -- the impedance decreases; the conductor wire diameter is not uniform -- the impedance is not uniform. Planning improvement: small impedance, increasing line diameter or increasing foaming process improvement: the water capacitance is small, and when it is heave, it is important to avoid the deformation of the core, and pay attention to the tension adjustment when the coaxial weaving.

3. Foaming degree: increase in foaming degree - dielectric constant decrease - increase of impedance; uneven foaming degree - dielectric constant - non-uniform impedance.

4. unshielded line: a) non-shielded line: reduce the knot pitch - impedance decreases; b) shielded wire is to: increase the knot pitch - impedance decrease

5. Wrap: wrap tension large - aluminum foil tight - impedance small.

6. Cable pitch (non-blocking) : reduced cable pitch - impedance decreases.

7. Cable wrap (non-pair shielding) : the cable bag is tight - impedance decreases.

      8. Woven elastic (non-blocking) : weaving tight - impedance decreases.

      9. Outside the elastic (non-blocking) : external compact-impedance small.