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patchMicrostripHnotch

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

Since R2019a

Description

Use the patchMicrostripHnotch object to create an H-shaped microstrip patch antenna. The default patch is centered at the origin with the feed point along the length. By default, the dimensions are chosen for an resonant frequency of 3.49 GHz for air or 2.61 GHz for Teflon substrate.

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

Description

example

ant = patchMicrostripHnotch creates an H-shaped notch microstrip patch antenna.

example

ant = patchMicrostripHnotch(Name=Value) sets additional 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.

  • 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. For more information, see lumpedElement.

Example: 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

showDisplay antenna, array structures, shapes, or platform
axialRatioAxial ratio of antenna
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
efficiencyRadiation efficiency of antenna
EHfieldsElectric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
impedanceInput impedance of antenna or scan impedance of array
meshMesh properties of metal, dielectric antenna, or array structure
meshconfigChange meshing mode of antenna, array, custom antenna, custom array, or custom geometry
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
rcsCalculate and plot radar cross section (RCS) of platform, antenna, or array
returnLossReturn loss of antenna or scan return loss of array
sparametersCalculate S-parameters for antennas and antenna arrays
vswrVoltage standing wave ratio (VSWR) of antenna or array element

Examples

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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.

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 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: 0.0016

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 = 3.5456e+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: 0.0016
            Substrate: [1x1 dielectric]
    GroundPlaneLength: 0.0436
     GroundPlaneWidth: 0.0451
    PatchCenterOffset: [0 0]
           FeedOffset: [-0.0025 -0.0050]
         FeedDiameter: 0.0010
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

Version History

Introduced in R2019a

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