Before revision: The standing wave pattern Using complex notation for the voltage amplitudes, for a signal at frequency , the actual (real) voltages V as a function of time are understood to relate to the complex voltages according to: Thus taking the real part of the complex quantity inside the parenthesis, the actual voltage consists of a sine wave at frequency with a peak amplitude equal to the complex magnitude of , and with a phase given by the phase of the complex .
After revision: The standing wave pattern Using complex notation for the voltage amplitudes, for a signal at frequency , the actual (real) voltages V as a function of time are understood to relate to the complex voltages according to: Thus taking the real part of the complex quantity inside the parenthesis, the actual voltage consists of a cosine wave at frequency with a peak amplitude equal to the complex magnitude of , and with a phase given by the phase of the complex .