In an rf impedance matching circuit it is assumed that transformer is ideal or large enough. I just wanted to know the quantification of "large enough" (which parameter is large with respect to what)
Question is in context of RFIC not discrete elements. I want to know the design specific practical value. say I have two impedance z0 and z1 depending on these what should be the practical value(thumb rule) of transformer, and how to approximate(calculate) it.
Transformers can be easily used as impedance transformation, but as the reactance depends on frequency hence the solution only employs on a narrow band. Also it should be taken care that inductance of coil should be much higher than the coil resistance. As we know that any resistance that coil possesses is source of energy loss. In short the transformer should have a high quality factor, where quality factor is defined as (energy stored/energy dissipated per cycle).
