traceTee

Create tee trace

Since R2021b

Description

Use the traceTee object to create a tee trace on the X-Y plane.

Note

This shape object supports behavioral modeling. For more information, see Behavioral Models.

Creation

Syntax

trace = traceTee

trace = traceTee(Name=Value)

Description

trace = traceTee creates a tee trace with default properties on the X-Y plane.

trace = traceTee(Name=Value) sets Properties using one or more name-value arguments. For example, traceTee(ReferencePoint=[1 1]) creates a tee trace with the reference point [1 1]. Properties not specified retain their default values.

Properties

Name — Name of tee trace

'mytraceTeeShape' (default) | character vector | string scalar

Name of the tee trace, specified as a character vector or a string scalar.

Example: trace = traceTee(Name="traceTeeShape")

Data Types: char | string

ReferencePoint — Reference point of tee trace

[0 0] (default) | two-element vector

Reference point of the tee trace in meters, specified as a two-element vector of nonnegative elements.

Example: trace = traceTee(ReferencePoint=[1 1])

Data Types: double

Length — Length of horizontal and vertical lines

[0.0200 0.0100] (default) | two-element vector

Length of the horizontal and vertical lines in meters, specified as a two-element vector of positive elements.

Example: trace = traceTee(Length=[0.0300 0.0200])

Data Types: double

Width — Width of horizontal and vertical lines

[0.0050 0.0050] (default) | two-element vector

Width of the horizontal and vertical lines in meters, specified as a two-element vector of positive elements.

Example: trace = traceTee(Width=[0.0060 0.0060])

Data Types: double

Offset — Offset along X-axis

0 (default) | nonnegative scalar

Offset along the X-axis in meters, specified as a nonnegative scalar.

Example: trace = traceTee(Offset=0.0005)

Data Types: double

Object Functions

add	Boolean unite operation on two RF PCB shapes
subtract	Boolean subtraction operation on two RF PCB shapes
intersect	Boolean intersection operation on two RF PCB shapes
plus	Shape1 + Shape2 for RF PCB shapes
minus	Shape1 - Shape2 for RF PCB shapes
mirrorX	Mirror shape along X-axis
mirrorY	Mirror shape along Y-axis
and	Shape1 & Shape2 for RF PCB shapes
area	Calculate area of RF PCB shape in square meters
rotate	Rotate RF PCB shape about defined axis
rotateX	Rotate RF PCB shape about x-axis
rotateY	Rotate RF PCB shape about y-axis and angle
rotateZ	Rotate RF PCB shape about z-axis
translate	Move RF PCB shape to new location
scale	Change size of RF PCB shape by fixed amount

Examples

Create Default Tee Trace

Create a tee trace with default properties.

trace = traceTee

trace = 
  traceTee with properties:

              Name: 'mytraceTeeShape'
    ReferencePoint: [0 0]
            Length: [0.0200 0.0100]
             Width: [0.0050 0.0050]
            Offset: 0

View the trace.

show(trace)

Use Behavioral Model to Calculate S-Parameters of Microstrip T-Junction

Design a microstrip transmission line at 3 GHz for FR4 substrate.

m = design(microstripLine('Substrate',dielectric('FR4')),3e9);

Create a microstrip T-junction.

layer2d = traceTee('Length',[m.Length m.Length/4],...
"Width",[m.Width m.Width/2]);

Convert the T-junction trace to a 3-D component.

robj = pcbComponent(layer2d);
robj.BoardThickness = m.Substrate.Thickness;
robj.Layers{2} = m.Substrate;
show(robj)

Define frequency points to calculate the s-parameters.

freq = (1:40)*100e6;

Calculate the s-parameters of the T-junction trace using the behavioral model.

Sckt = sparameters(robj,freq,75,'Behavioral',true);

Warning: Behavioral model is valid only when Z0 of main line is 50 ohms and for EpsilonR of 9.9.

Calculate the s-parameters of the T-junction trace using the electromagnetic solver.

Sem = sparameters(robj,freq,75)

Sem = 
  sparameters with properties:

      Impedance: 75
       NumPorts: 3
     Parameters: [3x3x40 double]
    Frequencies: [40x1 double]

Plot the s-parameter data using the rfplot function.

rfplot(Sckt,1:3,1,'db','-s')
hold on
rfplot(Sem,1:3,1,'db','-x')

References:

1. Ramesh Garg & I. J. Bahl (1978) Microstrip discontinuities, International Journal of Electronics, 45:1, 81-87, DOI: 10.1080/00207217808900883

2. Wadell, Brian C. Transmission Line Design Handbook. The Artech House Microwave Library. Boston: Artech House, 1991.

Version History

Introduced in R2021b