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splitterTee

Create T-junction power splitter

Description

Use the splitterTee object to create a T-junction power splitter. The T-junction is a lossless and reciprocal three-port divider which divides the input equally between the two output ports.

To analyze the behavioral model for the T-junction power splitter, set the Behavioral property in sparameters to true or 1.

Creation

Description

example

splitter = splitterTee creates a T-junction power splitter with default properties. The default properties are for a design frequency of 1.8 GHz.

example

splitter = splitterTee(Name=Value) sets Properties using one or more name-value arguments. For example, splitterTee(PortLineLength=0.0155) creates a T-junction splitter with a port line length of 0.0155 meters. Properties not specified retain their default values.

Properties

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Shape of the T-junction splitter, specified as 'RectangularMitered', 'RectangularCurved', or 'Circular'.

Example: splitter = splitterTee(Shape='Circular')

Data Types: char

Length of the port line in meters, specified as a positive scalar.

Example: splitter = splitterTee(PortLineLength=0.0144)

Data Types: double

Width of the port line in meters, specified as a positive scalar.

Example: splitter = splitterTee(PortLineWidth=0.0041)

Data Types: double

Length of the split line in meters, specified as a positive scalar. Generally the length is λ/4 for a Tee splitter.

Example: splitter = splitterTee(SplitLineLength=0.0420)

Data Types: double

Width of the split line in meters, specified as a positive scalar.

Example: splitter = splitterTee(SplitLineWidth=0.0025)

Data Types: double

Length of the miter diagonal at the bend in meters, specified as a positive scalar.

Example: splitter = splitterTee(BendMiterDiagonal=0.0045)

Data Types: double

Radius of the curve at the bend in meters, specified as a positive scalar.

Example: splitter = splitterTee(BendCurveRadius=0.0030)

Dependencies

To enable this property, set the Shape property to 'RectangularCurved'.

Data Types: double

Length of the match line in meters, specified as a positive scalar.

Example: splitter = splitterTee(MatchLineLength=0.0415)

Data Types: double

Width of the match line in meters, specified as a positive scalar.

Example: splitter = splitterTee(MatchLineWidth=0.0039)

Data Types: double

Spacing between the output ports in meters, specified as a positive scalar.

Example: splitter = splitterTee(PortSpacing=0.0420)

Data Types: double

Height of the T-junction power splitter from the ground plane in meters, specified as a positive scalar.

In the case of a multilayer substrate, you can use the Height property to create a T-junction power splitter where the two dielectrics interface.

Example: splitter = splitterTee(Height=0.0076)

Data Types: double

Width of the ground plane in meters, specified as a positive scalar.

Example: splitter = splitterTee(GroundPlaneWidth=0.098)

Example: double

Type of dielectric material used as a substrate, specified as a dielectric object. The dielectric material in a splitterTee object with default properties in Teflon.

Example: d = dielectric("FR4"); splitter = splitterTee(Substrate=d)

Data Types: string | char

Type of metal used in the conducting layers, specified as a metal object. The metal in a splitterTee object with default properties in PEC.

Example: m = metal("Copper"); splitter = splitterTee(Conductor=m)

Data Types: string | char

Object Functions

chargeCalculate and plot charge distribution
currentCalculate and plot current distribution
designDesign T-junction power splitter around specified frequency
feedCurrentCalculate current at feed port
layoutPlot all metal layers and board shape
meshChange and view mesh properties of metal or dielectric in PCB component
shapesExtract all metal layer shapes of PCB component
showDisplay PCB component structure or PCB shape
sparametersCalculate S-parameters for RF PCB objects

Examples

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Create a default splitter tee.

splitter = splitterTee
splitter = 
  splitterTee with properties:

                Shape: 'RectangularMitered'
       PortLineLength: 0.0155
        PortLineWidth: 0.0051
      SplitLineLength: 0.0320
       SplitLineWidth: 0.0015
    BendMiterDiagonal: 0.0035
      MatchLineLength: 0.0315
       MatchLineWidth: 0.0029
          PortSpacing: 0.0320
               Height: 0.0016
     GroundPlaneWidth: 0.0847
            Substrate: [1x1 dielectric]
            Conductor: [1x1 metal]

Visualize the splitter tee.

show(splitter)

Figure contains an axes object. The axes object with title splitterTee element contains 7 objects of type patch, surface. These objects represent PEC, feed, Teflon.

Create a curved rectangular splitter tee.

splitter = splitterTee(Shape='RectangularCurved')
splitter = 
  splitterTee with properties:

               Shape: 'RectangularCurved'
      PortLineLength: 0.0155
       PortLineWidth: 0.0051
     SplitLineLength: 0.0320
      SplitLineWidth: 0.0015
     BendCurveRadius: 0.0020
     MatchLineLength: 0.0315
      MatchLineWidth: 0.0029
         PortSpacing: 0.0320
              Height: 0.0016
    GroundPlaneWidth: 0.0847
           Substrate: [1x1 dielectric]
           Conductor: [1x1 metal]

Visualize the splitter tee.

show(splitter)

Figure contains an axes object. The axes object with title splitterTee element contains 7 objects of type patch, surface. These objects represent PEC, feed, Teflon.

Calculate and plot the s-parameters of the tee at 3 GHz.

spar = sparameters(splitter,3e9)
spar = 
  sparameters: S-parameters object

       NumPorts: 3
    Frequencies: 3.0000e+09
     Parameters: [3x3 double]
      Impedance: 50

  rfparam(obj,i,j) returns S-parameter Sij

rfplot(spar)

Figure contains an axes object. The axes object contains 9 objects of type line. These objects represent dB(S_{11}), dB(S_{21}), dB(S_{31}), dB(S_{12}), dB(S_{22}), dB(S_{32}), dB(S_{13}), dB(S_{23}), dB(S_{33}).

Create a splitter tee at the interface of a multilayer dielectric.

splitter = splitterTee;
splitter.Substrate = dielectric(Name={'Teflon','Teflon'},EpsilonR=[2.1 2.1], ...
    LossTangent=[0 0],Thickness=[0.8e-3 0.8e-3]);
splitter.Height = 0.8e-3;

Visualize the splitter tee.

show(splitter);

Figure contains an axes object. The axes object with title splitterTee element contains 8 objects of type patch, surface. These objects represent PEC, feed, Teflon.

References

[1] Pozar, David M. Microwave Engineering. 4th ed. Hoboken, NJ: Wiley, 2012.

[2] Kumari, Chanchala, and Neela Chattoraj. “Design of an Elementary Microstrip Power Splitter for Antenna Array.” In 2021 National Conference on Communications (NCC), 1–5. Kanpur, India: IEEE, 2021. https://doi.org/10.1109/NCC52529.2021.9530097.

Version History

Introduced in R2022b

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