pmrf.models.nonideal

Classes

CLCResistor([res, clc, name, separator, ...])

A model for a non-ideal resistor with parasitic capacitance and inductance.

NonIdealResistor(*[, name, separator, ...])

An abstract base class for creating realistic resistor models that include parasitic effects.
class pmrf.models.nonideal.NonIdealResistor(*, name=None, separator='_', metadata=<factory>, _z0=(50+0j), _param_groups=<factory>)[source]

Bases: Model

An abstract base class for creating realistic resistor models that include parasitic effects.

This class provides a framework for representing a physical resistor as a combination of an ideal resistive element and a network of parasitic components (like series inductance and parallel capacitance).

Subclasses are required to implement the ideal and parasitics properties to define the specific topology of the non-ideal model.

Parameters:

  • name (str | None)

  • separator (str)

  • metadata (dict)

  • _z0 (complex)

  • _param_groups (list[ParameterGroup])

abstract property ideal: Model

The ideal part of the component (e.g., the pure resistance).

Type:

Model

abstract property parasitics: Model

The parasitic network of the component.

Type:

Model

__init__(*, name=None, separator='_', metadata=<factory>, _z0=(50+0j), _param_groups=<factory>)
Parameters:

  • name (str | None)

  • separator (str)

  • metadata (dict)

  • _z0 (complex)

  • _param_groups (list[ParameterGroup])

Return type:

None

class pmrf.models.nonideal.CLCResistor(res=<factory>, clc=<factory>, *, name=None, separator='_', metadata=<factory>, _z0=(50+0j), _param_groups=<factory>)[source]

Bases: NonIdealResistor

A model for a non-ideal resistor with parasitic capacitance and inductance.

This model represents a physical resistor as a parasitic Pi-network (Capacitor-Inductor-Capacitor) cascaded with an ideal resistive element. This topology is common for modeling SMD resistors at high frequencies.

Parameters:
res

The ideal resistor model.

Type:

Resistor

clc

The parasitic Pi-network model (C-L-C).

Type:

PiCLC

Examples

import pmrf as prf

# Create a model for a 100-ohm resistor with parasitics
non_ideal_r = prf.models.CLCResistor(
    res=prf.models.Resistor(R=100),
    clc=prf.models.PiCLC(C1=0.05e-12, L=0.1e-9, C2=0.05e-12)
)

# You can access the ideal and parasitic parts
print(f"Ideal Resistance: {non_ideal_r.ideal.R.value} Ohms")

# Calculate the S-parameters of the complete non-ideal model
freq = prf.Frequency(start=0.1, stop=20, npoints=201, unit='ghz')
s = non_ideal_r.s(freq)

print(f"S11 at 10 GHz: {s[freq.center_idx, 0, 0]:.2f}")
res: Resistor
clc: PiCLC
property ideal: Model

The ideal resistor component.

Type:

Model

property parasitics: Model

The parasitic C-L-C network.

Type:

Model

a(freq)[source]

Calculates the ABCD parameter matrix.

If only s() is implemented, this is calculated using the conversion pmrf.functions.conversions.s2a().

Parameters:

freq (Frequency) – Frequency grid.

Returns:

ABCD matrix with shape (nf, 2, 2).

Return type:

jnp.ndarray

Raises:

NotImplementedError – If neither a nor s is implemented in a subclass.

__init__(res=<factory>, clc=<factory>, *, name=None, separator='_', metadata=<factory>, _z0=(50+0j), _param_groups=<factory>)
Parameters:
Return type:

None