reflection coefficient

Hi,

Is There difference between ref. coefficient = 0.3 and ref. coefficient = - 0.3?
If there difference , please explain?

Thanks alot

The polarity tells you if the phase is reversed. It means that the load is either higher or lower than the transmission line impedance. If phase is not important to your system, there is no real concern. The input impedance to the transmission line will be different which may cause the driving amplifier to function differently.