voltage coefficient การใช้

Hello . . . Could someone pleae precisely define Voltage Coefficient ? ??
There is also a current reflection coefficient; it is the same as the voltage coefficient, except that it has an opposite sign.
High linearity and accuracy is achieved by using resistors with extremely low voltage coefficients, in matched sets that maintain a consistent, precise divider ratio across the probe's operating temperature.
This is avoided by choosing capacitor types that have low " voltage coefficient ", and by using large values that put the cutoff frequency far lower than the frequencies of the signal.