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patchMicrostripTriangular

Create regular or AI-based triangular microstrip patch antenna

Description

Use the defualt patchMicrostripTriangular object to create a triangular microstrip patch antenna resonating around 15.67 GHz. The default patch is centered at the origin.

You can perform full-wave EM solver based analysis on the regular patchMicrostripTriangular antenna or you can create a patchMicrostripTriangular type AIAntenna and explore the design space to tune the antenna for your application using AI-based analysis.

Triangular microstrip patch antenna

Creation

Description

trianglepatch = patchMicrostripTriangular creates a triangular microstrip patch antenna with default property values. The default dimensions are chosen for an operating frequency of 15.67 GHz for the air or 12.9 GHz for the Teflon substrate.

example

trianglepatch = patchMicrostripTriangular(Name=Value) sets properties using one or more name-value arguments. Name is the property name and Value is the corresponding value. You can specify several name-value arguments in any order as Name1=Value1,...,NameN=ValueN. Properties that you do not specify, retain their default values.

For example, trianglepatch = patchMicrostripTriangular(Side=0.2) creates a triangular microstrip patch with a side length of 0.2 m.

example

  • You can also create a patchMicrostripTriangular antenna resonating at a desired frequency using the design function.

  • You can also create a patchMicrostripTriangular antenna from a microstrip patch type AIAntenna object using the exportAntenna function.

  • A patchMicrostripTriangular type AIAntenna has some common tunable properties with a regular patchMicrostripTriangular antenna for AI-based analysis. Other properties of the regular patchMicrostripTriangular antenna are retained as read-only in its AIAntenna equivalent. To find the upper and lower bounds of the tunable properties, use tunableRanges function.

Properties

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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. This property is tunable for patchMicrostripTriangular type AIAntenna object created using the design function.

Example: 0.2

Example: [0.2 0.3 0.4]

Data Types: double

Patch height above ground along z-axis, specified as a scalar in meters. This property is tunable for patchMicrostripTriangular type AIAntenna object created using the design function.

Example: 0.2

Data Types: double

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

Example: 120e-3

Data Types: double

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

Example: 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: [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 feed point relative to the ground plane and patch. Distances are measured along the length and width of the ground plane.

Example: [0.01 0.01]

Data Types: double

Feed diameter, specified as a scalar in meters.

Example: 0.0600

Data Types: double

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: metal("Copper")

Type of dielectric material used as a substrate, specified as a dielectric object. You can choose any dielectric material from the DielectricCatalog or specify a dielectric material of your choice. The substrate dimensions must be equal to the ground plane dimensions. For more information on dielectric substrate meshing, see Meshing.

Note

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

Example: Substrate=dielectric("FR4")

Example: antenna.Substrate = dielectric("FR4")

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.

Example: Load=lumpedElement(Impedance=75)

Example: antenna.Load = lumpedElement(Impedance=75)

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

Example: 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.

Data Types: double

Tilt axis of the antenna, specified as one of these values:

  • 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, specified as a 2-by-3 matrix corresponding to two three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points.

  • "x", "y", or "z" to describe a rotation about the x-, y-, or z-axis, respectively.

For more information, see Rotate Antennas and Arrays.

Example: [0 1 0]

Example: [0 0 0;0 1 0]

Example: "Z"

Data Types: double | string

Object Functions

axialRatioCalculate and plot axial ratio of antenna or array
bandwidthCalculate and plot absolute bandwidth of antenna or array
beamwidthBeamwidth of antenna
chargeCharge distribution on antenna or array surface
currentCurrent distribution on antenna or array surface
designDesign prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects
efficiencyCalculate and plot radiation efficiency of antenna or array
EHfieldsElectric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrentCalculate current at feed for antenna or array
impedanceCalculate and plot input impedance of antenna or scan impedance of array
infoDisplay information about antenna, array, or platform
memoryEstimateEstimate memory required to solve antenna or array mesh
meshMesh properties of metal, dielectric antenna, or array structure
meshconfigChange meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwriteWrite antenna or array analysis data to MSI planet file
optimizeOptimize antenna or array using SADEA optimizer
patternPlot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array
patternAzimuthAzimuth plane radiation pattern of antenna or array
patternElevationElevation plane radiation pattern of antenna or array
peakRadiationCalculate and mark maximum radiation points of antenna or array on radiation pattern
rcsCalculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequencyCalculate and plot resonant frequency of antenna
returnLossCalculate and plot return loss of antenna or scan return loss of array
showDisplay antenna, array structures, shapes, or platform
sparametersCalculate S-parameters for antenna or array
stlwriteWrite mesh information to STL file
vswrCalculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

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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)

Figure contains an axes object. The axes object with title patchMicrostripTriangular antenna element, xlabel x (mm), ylabel y (mm) contains 5 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern at 15 GHz.

pattern(p,15e9)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 5 objects of type patch, surface. Hidden axes object 2 contains 17 objects of type surface, line, text, patch.

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)

Figure contains an axes object. The axes object with title patchMicrostripTriangular antenna element, xlabel x (mm), ylabel y (mm) contains 5 objects of type patch, surface. These objects represent PEC, feed.

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)

Figure contains an axes object. The axes object with title patchMicrostripTriangular antenna element, xlabel x (mm), ylabel y (mm) contains 5 objects of type patch, surface. These objects represent PEC, feed.

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)

Figure contains an axes object. The axes object with title patchMicrostripTriangular antenna element, xlabel x (mm), ylabel y (mm) contains 5 objects of type patch, surface. These objects represent PEC, feed.

In the above figure, 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)

Figure contains an axes object. The axes object with title patchMicrostripTriangular antenna element, xlabel x (mm), ylabel y (mm) contains 6 objects of type patch, surface. These objects represent PEC, feed, Teflon.

Plot the radiation pattern of the antenna.

pattern(p,12.5e6)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 6 objects of type patch, surface. This object represents Teflon. Hidden axes object 2 contains 17 objects of type surface, line, text, patch. This object represents Teflon.

This example shows how to create an AI model based triangular microstrip patch antenna at 12.5 GHz and calculate its resonant frequency.

pAI = design(patchMicrostripTriangular,12.5e9,ForAI=true)
pAI = 
  AIAntenna with properties:

   Antenna Info
               AntennaType: 'patchMicrostripTriangular'
    InitialDesignFrequency: 1.2500e+10

   Tunable Parameters
                      Side: 0.0168
                    Height: 9.5934e-04

Use 'showReadOnlyProperties(pAI)' to show read-only properties

Vary its side length and height and calculate its resonant frequency.

pAI.Side = 0.0159;
pAI.Height = 0.00101;
resonantFrequency(pAI)
ans = 
1.3447e+10

Convert the AIAntenna to a regular triangular microstrip patch antenna.

pmC = exportAntenna(pAI)
pmC = 
  patchMicrostripTriangular with properties:

                 Side: 0.0159
               Height: 0.0010
            Substrate: [1x1 dielectric]
    GroundPlaneLength: 0.0240
     GroundPlaneWidth: 0.0240
    PatchCenterOffset: [0 0]
           FeedOffset: [0 0.0023]
         FeedDiameter: 2.9979e-04
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

Version History

Introduced in R2018a

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