traceCross

Create cross-shaped trace

Since R2021b

Description

Use the traceCross object to create a cross-shaped trace on the X-Y plane.

Note

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

Creation

Syntax

trace = traceCross

trace = traceCross(Name=Value)

Description

trace = traceCross creates a cross-shaped trace with default properties on the X-Y plane.

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

Properties

Name — Name of cross-shaped trace

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

Name of the cross-shaped trace, specified as a character vector or a string scalar.

Example: trace = traceCross(Name="traceCrossShape")

Data Types: char | string

ReferencePoint — Reference point for cross-shaped trace

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

Reference point for the cross-shaped trace in Cartesian coordinates, specified as a two-element vector.

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

Data Types: double

Length — Length of cross-shaped trace

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

Length of the cross-shaped trace in meters, specified as a two-element vector of positive elements.

Example: trace = traceCross(Length=[0.0800 0.0400])

Data Types: double

Width — Width of cross-shaped trace

[0.0020 0.0020] (default) | two-element vector

Width of the cross-shaped trace in meters, specified as a two-element vector of positive elements.

Example: trace = traceCross(Width=[0.005 0.005])

Data Types: double

Offset — Offset along X and Y direction

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

Offset along the X and Y direction in meters, specified as a two-element vector.

Example: trace = traceCross(Offset=[1 1])

Data Types: double

Object Functions

add	Boolean unite operation on two RF PCB shapes
and	Shape1 & Shape2 for RF PCB shapes
area	Calculate area of RF PCB shape in square meters
intersect	Boolean intersection operation on two RF PCB shapes
mesh	Change and view mesh properties of metal or dielectric in PCB component
minus	Shape1 - Shape2 for RF PCB shapes
mirrorX	Mirror shape along X-axis
mirrorY	Mirror shape along Y-axis
plus	Shape1 + Shape2 for RF PCB shapes
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
subtract	Boolean subtraction operation on two RF PCB shapes
scale	Change size of RF PCB shape by fixed amount
show	Display PCB component structure or PCB shape
translate	Move RF PCB shape to new location

Examples

Create Default Cross Trace

Create a cross-shaped trace with default properties.

trace = traceCross

trace = 
  traceCross with properties:

              Name: 'mytraceCross'
    ReferencePoint: [0 0]
            Length: [0.0100 0.0100]
             Width: [0.0020 0.0020]
            Offset: [0 0]

View the trace.

show(trace)

Use Behavioral Model to Calculate S-Parameters of Microstrip Cross

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

d = dielectric('FR4');
d.LossTangent = 0;
m = design(microstripLine('Substrate',d),3e9,'Z0',75,...
    'LineLength',0.5);

Create a microstrip cross.

layer2d = traceCross('Length',[m.Length m.Length], ...
    'Width',[m.Width m.Width]);

Convert the cross trace to a PCB 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 = (1:3:40)*100e6;

Calculate the s-parameters of the cross trace using the behavioral model.

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

Warning: Behavioral model is valid only when EpsilonR is 9.9.

Calculate the s-parameters of the cross trace using the electromagnetic solver.

Sem = sparameters(robj,freq);

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