
262 DISCRETE MICROWAVE AMPLIFIERS
13-5.5 Manley-Rowe Relationships
In 1957, J. M. Manley and H. E. Rowe proposed a means for evaluating parametric
amplifier circuits. Consider the equivalent circuit in Fig. 13-9. In this circuit, we
have a variable capacitance as the reactor element and two signal sources: the sig-
nal frequency (fs) and the pump frequency (fp), both of which are shown as gener-
ators. In series with both generators are filters that pass the generator frequency
and totally reject all other frequencies. There is also a series of loads, each of which
is isolated from the others by the same kind of ideal narrowband ...