skrf.circuit.Circuit¶

class skrf.circuit.Circuit(connections)[source]¶

Creates a circuit made of a set of N-ports networks.

For instructions on how to create Circuit see __init__().

A Circuit object is representation a circuit assembly of an arbitrary number of N-ports networks connected together via an arbitrary topology.

The algorithm used to calculate the resultant network can be found in [1].

References

Attributes

`C`	Return the global scattering matrix of the networks.
`G`	Generate the graph of the circuit.
`X`	Return the concatenated intersection matrix [X] of the circuit.
`connections_list`	Return the full list of connections, including intersections.
`connections_nb`	Return the number of intersections in the circuit.
`connections_pair`	List the connections by pair.
`dim`	Return the dimension of the C, X and global S matrices.
`edge_labels`	Return a dictionary describing the port and z0 of all graph edges.
`edges`	Return the list of all circuit connections
`intersections_dict`	Return a dictionary of all intersections with associated ports and z0:
`network`	Return the Network associated to external ports.
`networks_nb`	Return the number of connected networks (port excluded).
`nodes_nb`	Return the number of nodes in the circuit.
`port_indexes`	Return the indexes of the "external" ports.
`port_z0`	Return the external port impedances.
`s`	Return the global scattering parameters of the circuit.
`s_external`	Return the scattering parameters for the external ports.
`z0`	Characteristic impedances of "internal" ports.

Methods

`Ground`	Return a 2-port network of a grounded link.
`Open`	Return a 2-port network of an open link.
`Port`	Return a 1-port Network to be used as a Circuit port.
`SeriesImpedance`	Return a 2-port network of a series impedance.
`ShuntAdmittance`	Return a 2-port network of a shunt admittance.
`__init__`	Circuit constructor.
`currents`	Currents at internal ports.
`currents_external`	Currents at external ports.
`graph`	Generate the graph of the circuit.
`is_connected`	Check if the circuit's graph is connected.
`networks_dict`	Return the dictionary of Networks from the connection setup X.
`networks_list`	Return a list of unique networks (sorted by appearing order in connections).
`plot_graph`	Plot the graph of the circuit using networkx drawing capabilities.
`s_active`	Return "active" s-parameters of the circuit's network for a defined wave excitation a.
`voltages`	Voltages at internal ports.
`voltages_external`	Voltages at external ports
`vswr_active`	Return the "active" VSWR of the circuit's network for a defined wave excitation a.
`y_active`	Return the "active" Y-parameters of the circuit's network for a defined wave excitation a.
`z_active`	Return the "active" Z-parameters of the circuit's network for a defined wave excitation a.