electricpy.propagation_constants¶

electricpy.propagation_constants(z, y, length)[source]¶

Transaction Line Propagation Constant Calculator.

This function will evaluate the propagation constants for a long transmission line whose properties are governed by the differential equation:

$$\frac{d^{2}V}{d{x}^2}=\gamma V$$

From the above equation, the following formulas are derived to evaluate the desired constants.

$$\gamma =\sqrt{(}z\ast y)$$

$$Z_{\text{surge}}=\sqrt{(}z/y)$$

$$\alpha =\mathrm{\Re }\gamma$$

$$\beta =\mathrm{\Im }\gamma$$

Parameters:¶

z : complex¶

Impedence of the transmission line: R+j*2*pi*f*L

y : complex¶

Admitance of the transmission line g+j*2*pi*f*C

Returns:¶

params –

Dictionary of propagation constants including:

gamma: Propagation constant zc: Surge impedance alpha: Attenuation constant beta: Imaginary portion of gamma

Return type:¶

dict