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Appendix G Transformed Freq Domain Measurements Using SpiceAPPENDIX G

Transformed Frequency Domain Measurements Using Spice

G.1

INTRODUCTION

Time domain measurements taken on an automatic network analyzer can be easily replicated theoretically for dispersionless transmission lines using the SPICE time domain program simulation. A technique is presented here that gives the type, value, and position of the measured discontinuity directly from time domain measurements. Furthermore the effect of multiple discontinuities can be replicated by SPICE. Microwave impedance measurements have evolved from the slotted line to the computer-controlled automatic network analyzer. One of the major innovations of the network analyzer made possible by its broadband frequency capability was the simulation of time domain measurements. Though fundamentally a freque