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patchMicrostripHnotch

Create regular or AI-based H-shaped microstrip patch antenna

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Description

Use the default patchMicrostripHnotch object to create an H-shaped microstrip patch antenna resonating around 3.56 GHz. The default patch is centered at the origin with the feed point along the length.

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

H-shaped notch microstrip patch antenna

Creation

Syntax

ant = patchMicrostripHnotch
ant = patchMicrostripHnotch(Name=Value)

Description

ant = patchMicrostripHnotch creates an H-shaped notch microstrip patch antenna with default property values. The default dimensions are chosen for an operating frequency of 3.56 GHz for the air or 2.64 GHz for the Teflon substrate.

example

ant = patchMicrostripHnotch(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, ant = patchMicrostripHnotch(Width=0.2) creates a microstrip H-shaped patch antenna with a patch width of 0.2 m.

example

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

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

  • A patchMicrostripHnotch type AIAntenna has some common tunable properties with a regular patchMicrostripHnotch antenna for AI-based analysis. Other properties of the regular patchMicrostripHnoth 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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Patch length along the x-axis, specified as a scalar in meters. This property is tunable for patchMicrostripHnotch type AIAntenna object created using the design function.

Example: 0.0450

Data Types: double

Patch width along the y-axis, specified as a scalar in meters. This property is tunable for patchMicrostripHnotch type AIAntenna object created using the design function.

Example: 0.0500

Data Types: double

Notch length along the x-axis, specified as a scalar in meters. This property is tunable for patchMicrostripHnotch type AIAntenna object created using the design function.

Example: 0.0200

Data Types: double

Notch width along the y-axis, specified as a scalar in meters. This property is tunable for patchMicrostripHnotch type AIAntenna object created using the design function.

Example: 0.00600

Data Types: double

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

Example: 0.00500

Data Types: double

Type of dielectric material used as a substrate, specified as a dielectric object. For more information see, dielectric.

Example: dielectric("FR4")

Data Types: string

Ground plane length along the x-axis, specified as a scalar in meters. Setting the ground plane length to Inf uses the infinite ground plane technique for antenna analysis.

Example: 120e-3

Data Types: double

Ground plane width along the y-axis, specified as a scalar in meters. Setting the ground plane width to Inf uses the infinite ground plane technique for antenna analysis.

Example: 120e-3

Data Types: double

Signed distance of the patch from the origin, specified as a two-element real vector 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 the feed from the origin, specified as a two-element real-valued vector 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")

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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Open Live Script

Create and view a microstrip patch H-notch with default property values.

ant = patchMicrostripHnotch;
show(ant)

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

Open Live Script

Create an H-shaped patch with dielectric substrate of permittivity 2.33. 

ant = patchMicrostripHnotch(Substrate=dielectric(EpsilonR=2.33, LossTangent=0.0012));
show(ant)

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

This example uses:

Open Live Script

This example shows how to create an AI model based H-shaped notch microstrip patch antenna at 3.49 GHz and calculate its resonant frequency.

pAI = design(patchMicrostripHnotch,3.49e9,ForAI=true)
pAI = 
  AIAntenna with properties:

   Antenna Info
               AntennaType: 'patchMicrostripHnotch'
    InitialDesignFrequency: 3.4900e+09

   Tunable Parameters
                    Length: 0.0291
                     Width: 0.0301
               NotchLength: 0.0065
                NotchWidth: 0.0076
                    Height: 0.0025

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

Vary its notch length and notch width and calculate its resonant frequency. 

pAI.NotchLength = 0.0064;
pAI.NotchWidth = 0.0076;
resonantFrequency(pAI)
ans = 
3.5274e+09

Convert the AIAntenna to a regular H-shaped notch microstrip patch antenna.

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

               Length: 0.0291
                Width: 0.0301
          NotchLength: 0.0064
           NotchWidth: 0.0076
               Height: 0.0025
            Substrate: [1x1 dielectric]
    GroundPlaneLength: 0.0436
     GroundPlaneWidth: 0.0451
    PatchCenterOffset: [0 0]
           FeedOffset: [-0.0025 -0.0050]
         FeedDiameter: 9.9644e-04
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

Version History

Introduced in R2019a

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See Also

Functions

Objects

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