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nport

Create linear n-port circuit element

Description

The nport class creates an n-port object that can be added into an RF Toolbox™ circuit. The n-port S-parameters define the n-port object.

Note

To use in an rfbudget object, nport object must be created from a data file.

Creation

Description

example

nport_obj = nport(filename) creates an n-port object from the specified filename.

example

nport_obj = nport(netparamobj)creates an n-port object from a network parameter object. Network parameter object can be S, Z, Y, ABCD, h, or g-parameters.

nport_obj = nport(___,name)creates an nport object with the given name.

Properties

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Touchstone file, specified as a string scalar or character vector.

Data Types: char | string

Number of ports, specified as a scalar.

Example: 2

Network data, specified as a scalar. Network data can be of S, Z, Y, ABCD, h, or g-parameters.

Example: [1x1 sparameters]

Name of n-port object, specified as a scalar.

Example: obj

Port names, stored as a cell vector. This property is a read only.

Example: {’p1’ ‘p2’}

Terminal names, stored as a cell vector. There are two terminals per port. The positive terminal names are listed first ('p1+', 'p2+'...) followed by the negative terminal ('p1–', 'p2–'...). This property is read only.

Parent circuit nodes connected to n-port object terminals, stored as a vector of integers. ParentNodes is same length as Terminals. This property is read only and appears only after you add the n-port data.

Full path of the circuit to which the n-port object belongs, stored as character vector. This property is read only and appear only after you add the n-port object is added to the circuit.

Object Functions

smithplotPlot impedance transformation for selected matching network on smith chart
cloneCreate copy of existing circuit element or circuit object

Examples

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Create and display N-port data object.

npass = nport('passive.s2p')
npass = 
  nport: N-port element

    NetworkData: [1x1 sparameters]
           Name: 'Sparams'
       NumPorts: 2
      Terminals: {'p1+'  'p2+'  'p1-'  'p2-'}

Add a N-port object to a circuit. Display the object.

nobj = nport('passive.s2p');
ckt = circuit('example');
add(ckt,[1 2],nobj)
disp(nobj)
  nport: N-port element

    NetworkData: [1x1 sparameters]
           Name: 'Sparams'
       NumPorts: 2
      Terminals: {'p1+'  'p2+'  'p1-'  'p2-'}
    ParentNodes: [1 2 0 0]
     ParentPath: 'example'
Introduced in R2013b