A. Voltage and current
B. Impedance at different ports
C. Indecent and the reflected voltage waves
D. None of the above
Answer - C. Indecent and the reflected voltage waves
Explanation: S parameter for a microwave network is defined as the ratio of reflected voltage wave to the incident voltage wave. When represented in the form of a matrix, reflected voltage matrix is the product of S parameter and the incident voltage wave at that port.