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New for April 2015! Harmonic balance is a powerful steady-state technique that can be used to analyze linear and non-linear circuits.
In contrast to small signal S-parameter analysis (so-called linear analysis), harmonic balance considers multiple tones, making the assumption that the response can be determined if all of the chosen harmonics satisfy Kirchoff's law. Like electro-magnetic analysis, HB ends up being an approximation that meets an error function that you specify.
With harmonic balance it is possible to model multi-frequency response of receivers and exciters. It can also be employed to look at the non-linear response of a limiter.
HB can predict the performance of power amplifiers, provided you have an accurate large signal model of the transistor. That is a big caveat, ask the best power amplifier designers and you might find they hedge their bets using the Cripps method.
Revised Cascade Calculator
|Basic Scaler Cascade Analysis Calculator|
|Enter gain, noise figure, and P1dB to calculate cascaded system performance.|
| ||Stage 1||Stage 2||Stage 3||Total|
|Total Gain (dB) = Gain1 + Gain2 + Gain3|
|Total NF (dB) = 10*log10(nf1 + (nf2-1)/gain1 + (nf3-1)/(gain1*gain2))|
|Total P1dB (dB) = 10*log10((1/(p1dB1*gain2*gain3) + 1/(p1dB2*gain3) + 1/(p1dB3))^-1)|
| Note: The calculations for Total P1dB and NF
use linear values (NOT dB) for nf, p1dB, and gain.
|Need more stages and more system parameters? Try the free Cascade101 Worksheet!|