voltage reflection coefficient การใช้

• Voltage reflection coefficients on opposite sides of the boundary have opposite signs.
• The voltage reflection coefficient and current reflection coefficient on the same side have opposite signs.
• Alternatively, the above formula can be rearranged to express the input impedance in terms of the load impedance rather than the load voltage reflection coefficient:
• Because they are all the same except for sign it is traditional to interpret the reflection coefficient as the voltage reflection coefficient ( unless otherwise indicated ).
• With a single transmission line it is customary to define the voltage reflection coefficient for a wave incident on the boundary from the transmission line side, regardless of whether a source or load is connected on the other side.
• The Smith Chart allows simple conversion between the S _ { nn } \, parameter, equivalent to the voltage reflection coefficient and the associated ( normalised ) impedance ( or admittance )'seen'at that port.
• If the termination was a perfect open or short circuit the magnitude of the voltage reflection coefficient would be unity, all power would be reflected and the point would lie at some point on the unity circumference circle of the Smith chart.
• Where is the propagation constant and \ Gamma _ L = \ left ( Z _ L-Z _ 0 \ right ) / \ left ( Z _ L + Z _ 0 \ right ) is the voltage reflection coefficient at the load end of the transmission line.