R&S®ZRA/ZRB2/ZRC SWR Bridges
Measurement of reflection coefficient of RF circuits and components
The R&S®ZRA/ZRB2/ZRC SWR bridges are used to measure the reflection coefficient of RF circuits and components. The output signal from a signal generator, e.g. the tracking generator of an
Measurement accuracy
The accuracy of the SWR bridges is limited by their directivity and the return loss at their test port. The measurement of small reflection coefficients is impaired by the finite directivity of the SWR bridge. Reflection coefficients that are smaller than the directivity of the bridge cannot be measured directly. When large reflection coefficients are measured, the accuracy mainly depends on the return loss at the bridge's test port.
The diagram below allows a quantitative evaluation of the measurement error.
