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Question What is VSWR with Respect to Signal Switching? Solution VSWR (voltage standing wave ration) is a signal switch specification that usually is only important in high frequency, microwave applications At high frequencies resonance is generated from the interference between the input signal and the corresponding reflected signal. VSWR is specified as the ratio of the maximum value to the minimum value of the waveform. In simpler terms, the smaller the VSWR specification, the less effect the reflected signal will have on the signal the switch is intended to transmit