API › RAVAL

RSmithMath class

Il riferimento e' in inglese: viene dai commenti del sorgente di RAVAL, che dalla 2.0 ha nomi e commenti in inglese.

public static class RSmithMath

Conversions of the reflection coefficient and the circles of the Smith chart.

Metodi

static Complex Gamma(Complex z, double z0 = 50)

The reflection coefficient of an impedance on Z0.

static Complex Impedance(Complex gamma, double z0 = 50)

The impedance of a reflection coefficient, ohm (infinite at Γ = 1).

static Complex Admittance(Complex gamma, double z0 = 50)

The admittance of a reflection coefficient, siemens.

static double Vswr(Complex gamma)

The voltage standing wave ratio (infinite for |Γ| ≥ 1).

static double ReturnLoss(Complex gamma)

The return loss, dB (positive; infinite for Γ = 0).

static double Degrees(Complex z)

The angle of a complex number, degrees from −180 to 180.

static Complex Polar(double magnitude, double degrees)

A complex number from magnitude and angle in degrees.

static RCircle Resistance(double r)

Normalized resistance r constant.

static RCircle Reactance(double x)

Normalized reactance x constant (x ≠ 0).

static RCircle Conductance(double g)

Normalized conductance g constant.

static RCircle Susceptance(double b)

Normalized susceptance b constant (b ≠ 0).

static RCircle Vswr(double vswr)

Constant voltage standing wave ratio.

static (RCircle, RCircle) Q(double q)

Constant Q, two circles: the arc of the positive reactances (upper half of the chart) has its center in −j/Q, the other in +j/Q.

static RCircle OutputStability(Complex s11, Complex s12, Complex s21, Complex s22)

The output stability circle: the loads ΓL where |Γin| = 1. Which side is stable: see OutputStableInside.

static RCircle InputStability(Complex s11, Complex s12, Complex s21, Complex s22)

The input stability circle: the sources ΓS where |Γout| = 1.

static bool OutputStableInside(Complex s11, Complex s12, Complex s21, Complex s22)

Whether the stable loads are inside the output stability circle: the center of the chart (ΓL = 0, |Γin| = |S11|) is stable when |S11| < 1, and it tells on which side it lies.

static bool InputStableInside(Complex s11, Complex s12, Complex s21, Complex s22)

Whether the stable sources are inside the input stability circle.

static (double, double) Rollett(Complex s11, Complex s12, Complex s21, Complex s22)

The Rollett factor K and |Δ|: unconditionally stable when K > 1 and |Δ| < 1.

static RCircle UnilateralGain(Complex s, double gainDb)

A constant gain circle of a unilateral amplifier (S12 = 0) on one side: s is S11 for the source, S22 for the load; gainDb is the gain of that side, which at most is 1/(1 − |s|²).

static RCircle Noise(double fDb, double fminDb, double rn, Complex gammaOpt, double z0 = 50)

The constant noise figure circle: the sources with noise figure fDb, from the noise parameters Fmin (dB), Rn (ohm) and Γopt.