skrf.circuit.Circuit

class skrf.circuit.Circuit(connections, name=None)

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

[1]

16. Hallbjörner, Microw. Opt. Technol. Lett. 38, 99 (2003).

Parameters:

• connections (list[list[tuple]])

• name (str)

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.