Reflection Coefficient is defined as the ratio of the reflected wave to the incident wave at a reference plane. This value varies from -1 (for a shorted load) to +1 (for an open load) and becomes 0 for matched impedance load. The reflection coefficient is a parameter that describes how much of an electromagnetic wave is reflected by an impedance discontinuity in the transmission medium. The voltage reflection coefficient Γ determines the magnitude and phase of the reflected wave given the incident wave, the characteristic impedance of the transmission line, and the terminating impedance.