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abcdparameters

Create ABCD parameter object

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Syntax

habcd = abcdparameters(filename)
habcd = abcdparameters(hnet)
habcd = abcdparameters(data,freq)
habcd = abcdparameters(rftbxobj)

Description

example

habcd = abcdparameters(filename) creates an ABCD parameter object habcd by importing data from the Touchstone file specified by filename. All data is stored in real/imag format.

habcd = abcdparameters(hnet) creates an ABCD parameter object from the RF Toolbox™ network parameter object hnet.

habcd = abcdparameters(data,freq) creates an ABCD parameter object from the ABCD parameter data, data, and frequencies, freq.

habcd = abcdparameters(rftbxobj) extracts network data from rftbxobj and converts it into ABCD-parameter data.

Examples

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Open Live Script

Read the file default.s2p as abcd-parameters.

abcd = abcdparameters('default.s2p')
abcd = 
  abcdparameters: ABCD-parameters object

       NumPorts: 2
    Frequencies: [191x1 double]
     Parameters: [2x2x191 double]

  rfparam(obj,specifier) returns specified ABCD-parameter 'A', 'B', 'C', or 'D'

Extract parameter A.

A = rfparam(abcd,'A')
A = 191×1 complex

  -0.1470 - 0.0698i
  -0.1421 - 0.0698i
  -0.1373 - 0.0696i
  -0.1325 - 0.0694i
  -0.1277 - 0.0691i
  -0.1231 - 0.0688i
  -0.1185 - 0.0683i
  -0.1140 - 0.0678i
  -0.1097 - 0.0672i
  -0.1054 - 0.0666i
      ⋮

Input Arguments

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ABCD parameter data, specified as an array of complex numbers, of size 2N-by-2N-by-K. The function uses this input argument to set the value of the Parameters property of habcd.

Touchstone data file, specified as a character vector, that contains network parameter data. filename can be the name of a file on the MATLAB® path or the full path to a file.

Example: habcd = abcdparameters('defaultbandpass.s2p');

ABCD parameter frequencies, specified as a vector of positive real numbers, sorted from smallest to largest. The function uses this input argument to set the value of the Frequencies property of habcd.

Network parameter data, specified as a scalar handle. If hnet is an ABCD parameter object, then habcd is a deep copy of hnet. Otherwise, the function performs a network parameter conversion to create habcd. When converting network parameters, the same restrictions apply as those for RF Toolbox network parameter data conversion functions:

  • ABCD parameter objects support 2N-port data.

  • Hybrid-g parameter objects support 2-port data.

  • Hybrid parameter objects support 2-port data.

  • S-parameter objects support N-port data.

  • Y-parameter objects support N-port data.

  • Z-parameter objects support N-port data.

  • T-parameter objects support 2-port data.

Network object, specified as a scalar handle. Specify rftbxobj as one of the following types: rfdata.data, rfdata.network, and any analyzed rfckt type.

Output Arguments

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ABCD parameter data, returned as a scalar handle. disp(habcd) returns the properties of the object:

  • NumPorts — Number of ports, specified as an integer. The function calculates this value automatically when you create the object.

  • Frequencies — ABCD parameter frequencies, specified as a K- by- 1 vector of positive real numbers sorted from smallest to largest. The function sets this property from the filename or freq input arguments.

  • Parameters — ABCD parameter data, specified as a 2N-by-2N-by-K array of complex numbers. The function sets this property from the filename or data input arguments.

Version History

Introduced in R2012b

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See Also

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