txlineWtable

Create table-based lossy transmission line

Since R2026a

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    Description

    Use the txlineWtable object to create a table-based lossy transmission line for enabling network characterization for signal-integrity workflows, such as time-domain reflectometry.

    Creation

    Syntax

    Wtabletxline = txlineWtable
    Wtabletxline = txlineWtable(Name=Value)

    Description

    Wtabletxline = txlineWtable creates a default table-based lossy transmission line object.

    Wtabletxline = txlineWtable(Name=Value) sets properties using one or more name-value arguments. For example, Wtabletxline = txlineWtable(Linelength=0.1) creates an table-based lossy transmission line of length 0.1 meters. Properties you do not specify retain their default values.

    example

    Properties

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    Name of the table-based lossy transmission line, specified as a string scalar or a character vector.

    Example: Name='Wrlcgline1'

    Data Types: char | string

    Number of signal conductors in the table-based lossy transmission line, specified as a nonnegative integer.

    Example: Nline=2

    Data Types: double

    Frequency-domain resistance values in the upper triangular portion of the resistance-per-length matrix, evaluated at Rfreq, specified as a nonnegative scalar in Ω/m or nonnegative 1-D vector with each element unit in Ω/m.

    Example: R=0.5

    Data Types: double

    Frequency of R, specified as a nonnegative scalar or 1-D vector in Hz.

    Example: Rfreq=0.5e9

    Data Types: double

    Frequency-domain inductance values in the upper triangular portion of the inductance-per-length matrix, evaluated at Lfreq, specified as a nonnegative scalar in H/m or nonnegative 1-D vector with each element unit in H/m.

    Example: L=2e-9

    Data Types: double

    Frequency of L, specified as a nonnegative scalar or 1-D vector in Hz.

    Example: Lfreq=0.5e9

    Data Types: double

    Frequency-domain inductance values in the upper triangular portion of the capacitance-per-length matrix, evaluated at Lfreq, specified as a nonnegative scalar in F/m or nonnegative 1-D vector with each element unit in F/m.

    Example: Co=0.5

    Data Types: double

    Frequency of C, specified as a nonnegative scalar or 1-D vector in Hz.

    Example: Cfreq=0.5e9

    Data Types: double

    Frequency-domain conductance values in the upper triangular portion of the conductance-per-length matrix, evaluated at Gfreq, specified as a nonnegative scalar in S/m, or nonnegative 1-D vector with each element unit in S/m.

    Example: G=0.5

    Data Types: double

    Frequency of G, specified as a nonnegative scalar or 1-D vector in Hz.

    Example: Gfreq=0.5e9

    Data Types: double

    Inductance values at high frequencies in the in the upper triangular portion of the inductance-per-length matrix, specified as a nonnegative scalar in H/m or nonnegative 1-D vector with each element unit in H/m.

    Example: Lhf=0.5e-9

    Data Types: double

    Capacitance values at high frequencies in the in the upper triangular portion of the capacitance-per-length matrix, specified as a nonnegative scalar in F/m or nonnegative 1-D vector with each element unit in F/m.

    Example: Chf=0.5e-9

    Data Types: double

    Physical length of the table-based transmission line, specified as a positive scalar in meters.

    Example: LineLength=0.0200

    Data Types: double

    This property is read-only.

    Number of input and output ports, represented as positive scalar.

    Data Types: double

    This property is read-only.

    Terminals of the table-based transmission line, represented as a cell array of strings.

    Data Types: char | string

    Object Functions

    sparametersCalculate S-parameters for RF data, network, circuit, and matching network objects
    groupdelayGroup delay of S-parameter, RF filter, or RF Toolbox circuit object
    noisefigureCalculate noise figure of transmission lines, series RLC, and shunt RLC circuits
    circuitCircuit object
    cloneCreate copy of existing circuit element or circuit object

    Examples

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    Open Live Script

    Load the table-based lossy transmission line data.

    load('tableData.mat','t');

    Specify the line length of the table-based lossy transmission line.

    lineLength = 3e-2;

    Create a txlineWtable object and define its parameters from the tableData.mat file.

    Wtabletxline = txlineWtable('nline', t.n, 'Rfreq', t.fR, 'Lfreq', t.fL, ...
    'L', t.Lraw, 'Gfreq', t.fG, 'Cfreq', t.fC, ...
    'C', t.Craw, 'R', t.Rraw, 'G', t.Graw, 'LineLength', lineLength);

    Calculate the S-parameters of the table-based lossy transmission line.

    freq = 1e6:10e6:40e9;
sobj = sparameters(Wtabletxline,freq);

    Version History

    Introduced in R2026a

    See Also

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