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

Description

example

trianglepatch = patchMicrostripTriangular creates a triangular microstrip patch antenna.

example

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

expand all

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

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

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

Example: 'GroundPlaneLength',120e-3

Example: trianglepatch.GroundPlaneLength = 120e-3

Data Types: double

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

Example: 'GroundPlaneWidth',120e-3

Example: trianglepatch.GroundPlaneWidth = 120e-3

Data Types: double

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

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

Feed diameter, specified as a scalar in meters.

Example: 'FeedDiameter',0.0600

Example: trianglepatch.FeedDiameter = 0.0600

Data Types: double

Type of dielectric material used as a substrate, specified as a dielectric object. You place the patch over this dielectric substrate. For more information, see dielectric. For more information on dielectric substrate meshing, see Meshing.

Note

The substrate dimensions must be equal to the groundplane dimensions.

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

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

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

Example: 'Load',lumpedelement, where lumpedelement is the object handle for the load created using lumpedElement.

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

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 degree about two axes, defined by vectors.

Data Types: double

Tilt axis of the antenna, specified as:

  • Three-element vectors of Cartesian coordinates in meters. In this case, each 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: ant.TiltAxis = 'Z'

Object Functions

showDisplay antenna or array structure; Display shape as filled patch
axialRatioAxial ratio of antenna
beamwidthBeamwidth of antenna
chargeCharge distribution on metal or dielectric antenna or array surface
currentCurrent distribution on metal or dielectric antenna or array surface
designDesign prototype antenna or arrays for resonance at specified frequency
EHfieldsElectric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedanceInput impedance of antenna; scan impedance of array
meshMesh properties of metal or dielectric antenna or array structure
meshconfigChange mesh mode of antenna structure
patternRadiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuthAzimuth pattern of antenna or array
patternElevationElevation pattern of antenna or array
returnLossReturn loss of antenna; scan return loss of array
sparametersS-parameter object
vswrVoltage standing wave ratio of antenna

Examples

collapse all

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
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

show(p)

Plot the radiation pattern at 15 GHz.

pattern(p,15e9)

Create different types of triangles to use in the patch.

Equilateral Triangle

Create an equilateral triangle patch of side 10.2mm.

ant = patchMicrostripTriangular('Side',10.2e-3);
show(ant);

Isosceles Triangle

Create an isosceles triangular patch antenna with sides using the following dimensions: 10.2 mm and 15 mm.

ant =  patchMicrostripTriangular('Side',[10.2e-3,15e-3]);
show(ant);

In the above figure, you will see that 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: 21 mm, 13 mm, and 20 mm.

patchMicrostripTriangular('Side',[21e-3,13e-3,20e-3]);
show(ant);

In the above figure, you will see that the first value of the side is chosen as the base of the triangle.

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)

Introduced in R2018a