Automated one-port impedance measurements on SAW devices with RF pulses

A reflectometer-based system controlled by a desk-top computer has been developed for measuring one-port impedances of Surface Acoustic Wave (SAW) devices. This system is unique in that besides being usable with CW signals, pulsed RF signals may also be used because the system allows for the gating out of spurious signals due to reflections, etc. Measurements made on SAW devices and dummy loads in the 50–500-MHz range are comparable to the same measurements made on a commercially available impedance bridge.