patchMicrostripTriangular

Create triangular microstrip patch antenna

Description

Use the patchMicrostripTriangular object to create a triangular microstrip patch antenna. The default patch is centered at the origin. By default, the dimensions are chosen for an operating frequency of 15 GHz. If you use a Teflon substrate, the default operating frequency is at 12.5 GHz.

Creation

Syntax

trianglepatch = patchMicrostripTriangular

trianglepatch = patchMicrostripTriangular(Name,Value)

Description

trianglepatch = patchMicrostripTriangular creates a triangular microstrip patch antenna.

trianglepatch = patchMicrostripTriangular(Name,Value) sets properties using one or more name-value pairs. For example, trianglepatch = patchMicrostripTriangular('Side',0.2) creates a triangular microstrip patch with a side length of 0.2 m. Enclose each property name in quotes.

Properties

Side — Side lengths of triangular patch

0.0102 (default) | scalar | two or three-element vector

Side lengths of triangular patch, specified as a scalar in meters or a two or three-element vector with each element unit in meters.

• Equilateral triangle - Side property value is a scalar. All three sides of the triangle are equal.

• Isosceles triangle - Side property value is a two-element vector. The first value specifies the base of the triangle along the x-axis. The second value specifies the other two sides of the triangle.

• Scalene triangle - Side property value is a three-element vector. The first value specifies the base of the triangle along the x-axis. The remaining two values specify the other two sides of the triangle.

Example: 'Side',0.2

Example: trianglepatch.Side = [0.2,0.3,0.4] where the first value is the base of the scalene triangle along the x-axis.

Data Types: double

Height — Patch height above ground along z-axis

0.0016 (default) | scalar

Patch height above ground along z-axis, specified as a scalar in meters.

Example: 'Height',0.2

Example: trianglepatch.Height = 0.002

Data Types: double

GroundPlaneLength — Ground plane length along x-axis

0.0120 (default) | scalar

Ground plane length along x-axis, specified as a scalar in meters.

Example: 'GroundPlaneLength',120e-3

Example: trianglepatch.GroundPlaneLength = 120e-3

Data Types: double

GroundPlaneWidth — Ground plane width along y-axis

0.0120 (default) | scalar

Ground plane width along y-axis, specified as a scalar in meters.

Example: 'GroundPlaneWidth',120e-3

Example: trianglepatch.GroundPlaneWidth = 120e-3

Data Types: double

PatchCenterOffset — Signed distance of patch from origin

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

Signed distance of patch from origin, specified as a two-element real vector with each element unit in meters. Use this property to adjust the location of the patch relative to the ground plane. Distances are measured along the length and width of the ground plane.

Example: 'PatchCenterOffset',[0.01 0.01]

Example: trianglepatch.PatchCenterOffset = [0.01 0.01]

Data Types: double

FeedOffset — Signed distance of feed from origin

[0 5.4173e-04] (default) | two-element real vector

Signed distance of feed from origin, specified as a two-element real vector with each element unit in meters. Use this property to adjust the location of the feedpoint relative to the ground plane and patch. Distances are measured along the length and width of the ground plane.

Example: 'FeedOffset',[0.01 0.01]

Example: trianglepatch.FeedOffset = [0.01 0.01]

Data Types: double

FeedDiameter — Feed diameter

2.5000e-04 (default) | scalar

Feed diameter, specified as a scalar in meters.

Example: 'FeedDiameter',0.0600

Example: trianglepatch.FeedDiameter = 0.0600

Data Types: double

Conductor — Type of metal material

'PEC' (default) | metal object

Type of the metal used as a conductor, specified as a metal material object. You can choose any metal from the MetalCatalog or specify a metal of your choice. For more information, see metal. For more information on metal conductor meshing, see Meshing.

Example: m = metal('Copper'); 'Conductor',m

Example: m = metal('Copper'); ant.Conductor = m

Substrate — Type of dielectric material

'Air' (default) | dielectric function

Type of dielectric material used as a substrate, specified as a dielectric material object. You can choose any material from the DielectricCatalog or use your own dielectric material. For more information, see dielectric. For more information on dielectric substrate meshing, see Meshing.

Note

The substrate dimensions must be lesser than the ground plane dimensions.

Example: d = dielectric('FR4'); 'Substrate',d

Example: d = dielectric('FR4'); ant.Substrate = d

Load — Lumped elements

[1x1 lumpedElement] (default) | lumpedElement object

Lumped elements added to the antenna feed, specified as a lumpedElement object. You can add a load anywhere on the surface of the antenna. By default, the load is at the feed. For more information, see lumpedElement.

Example: 'Load',lumpedElement, where lumpedElement is load added to the antenna feed.

Example: ant.Load = lumpedElement('Impedance',75)

Tilt — Tilt angle of antenna

0 (default) | scalar | vector

Tilt angle of the antenna, specified as a scalar or vector with each element unit in degrees. For more information, see Rotate Antennas and Arrays.

Example: Tilt=90

Example: Tilt=[90 90],TiltAxis=[0 1 0;0 1 1] tilts the antenna at 90 degrees about the two axes defined by the vectors.

Note

The wireStack antenna object only accepts the dot method to change its properties.

Data Types: double

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector of Cartesian coordinates | two three-element vectors of Cartesian coordinates | 'X' | 'Y' | 'Z'

Tilt axis of the antenna, specified as:

• Three-element vector of Cartesian coordinates in meters. In this case, each coordinate in the vector starts at the origin and lies along the specified points on the X-, Y-, and Z-axes.

• Two points in space, each specified as three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points in space.

• A string input describing simple rotations around one of the principal axes, 'X', 'Y', or 'Z'.

For more information, see Rotate Antennas and Arrays.

Example: TiltAxis=[0 1 0]

Example: TiltAxis=[0 0 0;0 1 0]

Example: TiltAxis = 'Z'

Data Types: double

Object Functions

show	Display antenna, array structures or shapes
axialRatio	Axial ratio of antenna
beamwidth	Beamwidth of antenna
charge	Charge distribution on antenna or array surface
current	Current distribution on antenna or array surface
design	Design prototype antenna or arrays for resonance around specified frequency
efficiency	Radiation efficiency of antenna
EHfields	Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedance	Input impedance of antenna; scan impedance of array
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change mesh mode of antenna structure
optimize	Optimize antenna or array using SADEA optimizer
pattern	Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuth	Azimuth pattern of antenna or array
patternElevation	Elevation pattern of antenna or array
rcs	Calculate and plot radar cross section (RCS) of platform, antenna, or array
returnLoss	Return loss of antenna; scan return loss of array
sparameters	Calculate S-parameter for antenna and antenna array objects
vswr	Voltage standing wave ratio of antenna

Examples

Default Triangular Microstrip Patch and Radiation Pattern

Create and view a default triangular microstrip patch.

p = patchMicrostripTriangular

p = 
  patchMicrostripTriangular with properties:

                 Side: 0.0102
               Height: 0.0016
            Substrate: [1x1 dielectric]
    GroundPlaneLength: 0.0120
     GroundPlaneWidth: 0.0120
    PatchCenterOffset: [0 0]
           FeedOffset: [0 5.4173e-04]
         FeedDiameter: 2.5000e-04
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

show(p)

Plot the radiation pattern at 15 GHz.

pattern(p,15e9)

Different Types of Triangular Patch Antennas

Create different types of triangles to use in the patch.

Equilateral Triangle

Create an equilateral triangle patch of side 7.2 mm.

ant = patchMicrostripTriangular('Side',7.2e-3);
show(ant);

Isosceles Triangle

Create an isosceles triangular patch antenna with sides using the following dimensions: 5 mm and 7.2 mm.

ant =  patchMicrostripTriangular('Side',[5e-3,7.2e-3]);
show(ant);

In the above figure, the first value of the side is chosen as the base of the triangle.

Scalene Triangle

Create a scalene triangular patch antenna with side using the following dimensions: 8 mm, 5 mm, and 4 mm.

ant = patchMicrostripTriangular('Side',[8e-3, 6e-3, 5e-3]);
show(ant);

In the above figure, the first value of the side is chosen as the base of the triangle.

Triangle Patch Using Teflon Substrate and Radiation Pattern

Create and view a triangular microstrip patch using Teflon substrate.

d = dielectric('Teflon');
p = patchMicrostripTriangular('Substrate',d);
show(p)

Plot the radiation pattern of the antenna.

pattern(p,12.5e6)

Version History

Introduced in R2018a