Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 130

One common desire in evaluating the performance of a component is to model that component as an impedance comprised of a resistive element with a single series or shunt reactive element, as demonstrated in Section 2.4.1.1. This desire was furthered by some built‐in transformation functions on VNAs, first introduced with the HP8753A but common now on many models. The goal was to model a device in such a way that the S‐parameters mapped to a single resistive and reactive element in the so‐called Z‐transform case (not to be confused with the discrete time z‐transform) or a single conductance and susceptance in the Y‐transform case. These are quite simple models and represented in Figure 2.40.

Figure 2.40 Y and Z conversion circuits.