See other Frequency Converting Device Measurements
Return loss and VSWR are both linear reflection measurements, even when testing frequency conversion devices, because the reflected frequency is not converted. These measurements are essentially the same as for filters and amplifiers. Learn more about Reflection Measurements.
Why Measure Return Loss and VSWR?
Devices which have poor return loss and VSWR result in loss of signal power or degradation of signal information.
How to Measure Return Loss and VSWR
Setup the VNA measure return loss and VSWR as you would any two-port device. Connect your frequency converting device as shown in the following diagrams:
RETURN LOSS AND VSWR OF MIXER INPUT PORT
RETURN LOSS AND VSWR OF MIXER OUTPUT PORT
RETURN LOSS AND VSWR OF MIXER LO PORT
