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txlineStripline

Create stripline transmission line element

Description

Use the txlineStripline object to create a stripline transmission line element. The cross-section of a stripline transmission line is shown in the following figure. The physical characteristics of a stripline transmission line include strip width w, strip length l, strip thickness t, substrate height h, and relative permittivity constant ε. You can also use the txlineStripline object to model a delay lossless transmission line in an RF system using the rfbudget object or the RF Budget Analyzer app.

Cross-section of a stripline transmission line

Creation

Description

example

txline = txlineStripline creates a stripline transmission line object.

example

txline = txlineStripline(Name=Value) sets properties using one or more name-value arguments. For example, txline = txlineStripline(Width=0.0046) creates a standard stripline transmission line with a width of 0.0046 meters. Properties you do not specify retain their default values.

Properties

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Name of the stripline transmission line, specified as a string scalar or a character vector.

Example: Name='stripline1'

Physical width of the stripline transmission line, specified as a positive scalar in meters.

Example: Width=0.0008

Data Types: double

Physical thickness of the dielectric, specified as a positive scalar in meters.

Example: DielectricThickness=0.00835

Data Types: double

Physical thickness of the stripline transmission line, specified as a positive scalar in meters.

Example: Thickness=0.00002

Data Types: double

Relative permittivity of the dielectric, specified as a positive scalar.

Example: EpsilonR=8.8

Data Types: double

Loss angle tangent of the dielectric, specified as a nonegative scalar.

Example: LossTangent=0.01

Data Types: double

Conductivity of the conductor, specified as a nonnegative scalar in Siemens per meter (S/m).

Example: SigmaCond=2

Data Types: double

Physical length of the stripline transmission line, specified as a positive scalar in meters.

Example: LineLength=0.0200

Data Types: double

Stub transmission line termination, specified as either 'NotApplicable', 'Open', or 'Short'.

Example: Termination='Short'

Data Types: char

Type of stub, specified as either 'NotAStub', 'Series', or 'Shunt'.

Example: StubMode='Series'

Data Types: char

This property is read-only.

Number of input and output ports, returned as a positive scalar.

Data Types: double

This property is read-only.

Terminals of the stripline transmission line, returned 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 object or RF filter object or RF Toolbox circuit object
noisefigureCalculate noise figure of transmission lines, series RLC, and shunt RLC circuits
getZ0Calculate characteristic impedance with and without dispersion for transmission line
circuitCircuit object
cloneCreate copy of existing circuit element or circuit object

Examples

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Create a 10 GHz stripline transmission line.

 stl = txlineStripline(Width=0.08e-3,DielectricThickness=1.6e-3,LineLength=12.2777e-3,...
          Thickness=0.01e-3,EpsilonR=3.9,SigmaConductivity=5.88e7);

Calculate the S-parameters of the stripline transmission line.

 freq = linspace(9e9,15e9,101);
 spar1 = sparameters(stl,freq,50);

Plot the S21 and S11 of the stripline transmission line.

 rfplot(spar1,[2 1],1)

Figure contains an axes object. The axes object contains 2 objects of type line. These objects represent dB(S_{21}), dB(S_{11}).

Create a stripline transmission line object.

 txline = txlineStripline;

Calculate the group delay of the stripline transmission line.

freq = linspace(5e9,15e9,101);
gd = groupdelay(txline,freq,Impedance=50);

Plot the group delay of the stripline transmission line.

plot(freq,gd)

Figure contains an axes object. The axes object contains an object of type line.

Calculate the characteristic impedance of the stripline transmission line.

char = getZ0(txline,10e9)
char = 49.5426

Version History

Introduced in R2022a

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