unilateral_figure()

Returns the unilateral figure as a real number

Syntax
U = uniltaeral_figure(SParam)

Arguments

Name	Description	Type	Required
SParam	2-Port S-Parameters	complex	yes

Examples

Form an S matrix at a single frequency
sMat=polar(0.55,-50), polar(0.02,10)}, {polar(3.82,80),polar(0.15,-20)
U = uniltaeral_figure(sMat)
returns 0.009
U_plus = 10*log(1/(1-U)**2)
returns 0.081
U_minus = 10*log(1/(1+U)**2)
returns -0.08

Defined in

$HPEESOF_DIR/expressions/ael/circuit_fun.ael

See Also

Not applicable

Notes/Equations

Used in Small-signal S-parameter simulations.
This function is used to calculate the Unilateral Figure of Merit, which determines whether the simplification can be made in neglecting the effect of S ₁₂ (unilateral behavior of device). It is calculated as:

The error limit on unilateral figure or merit, U is:

where:
GT is Transducer Gain
GTU is Unilateral Transducer Gain
This function can be used only with 2-Port S-parameters and works only on 1-dimensional or single swept parameter data.