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patchMicrostripInsetfed

Create regular or AI-based inset-fed microstrip patch antenna

Description

Use the patchMicrostripInsetfed object to create an inset-fed microstrip patch antenna. The default patch is centered at the origin.

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

Inset-fed microstrip patch antenna geometry

Creation

Description

example

insetpatch = patchMicrostripInsetfed creates an inset-fed microstrip patch antenna centered at the origin.

insetpatch = patchMicrostripInsetfed(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, insetpatch = patchMicrostripInsetfed(Length=0.2) creates an inset-fed patch of length 0.2 m.

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

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

  • A patchMicrostripInsetfed type AIAntenna has some common tunable properties with a regular patchMicrostripInsetfed antenna for AI-based analysis. Other properties of the regular patchMicrostripInsetfed 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 x-axis, specified as a scalar in meters. The default length is for an resonant frequency of 4.5 GHz. This property is tunable for patchMicrostripInsetfed type AIAntenna object created using the design function.

Example: 0.2

Data Types: double

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

Example: 0.1

Data Types: double

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

Example: 0.001

Data Types: double

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

Example: 120e-3

Data Types: double

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

Example: 120e-3

Data Types: double

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

Note

The substrate dimensions must be equal to the ground plane dimensions.

Example: dielectric("FR4")

Signed distance of patch from 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.

Example: [0.01 0.01]

Data Types: double

Signed distance of feed from origin, specified as a two-element real vector in meters. Use this property to adjust the location of the feed point relative to the ground plane and patch.

Example: [0.01 0.01]

Data Types: double

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

Example: 0.1

Data Types: double

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

Example: 0.2

Data Types: double

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

Example: 0.1

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 default inset-fed microstrip patch.

insetpatch = patchMicrostripInsetfed
insetpatch = 
  patchMicrostripInsetfed with properties:

               Length: 0.0300
                Width: 0.0290
               Height: 0.0013
            Substrate: [1x1 dielectric]
    PatchCenterOffset: [0 0]
           FeedOffset: [-0.0300 0]
       StripLineWidth: 1.0000e-03
          NotchLength: 0.0080
           NotchWidth: 0.0030
    GroundPlaneLength: 0.0600
     GroundPlaneWidth: 0.0600
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

show(insetpatch)

Figure contains an axes object. The axes object with title patchMicrostripInsetfed antenna element, xlabel x (mm), ylabel y (mm) contains 4 objects of type patch, surface. These objects represent PEC, feed.

This example shows how to create an AI model based inset-fed microstrip patch antenna at 4.5 GHz and calculate its resonant frequency.

pAI = design(patchMicrostripInsetfed,4.5e9,ForAI=true)
pAI = 
  AIAntenna with properties:

   Antenna Info
               AntennaType: 'patchMicrostripInsetfed'
    InitialDesignFrequency: 4.5000e+09

   Tunable Parameters
                    Length: 0.0300
                     Width: 0.0300
                    Height: 0.0017
            StripLineWidth: 0.0019
               NotchLength: 0.0044
                NotchWidth: 0.0033

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

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

pAI.NotchLength = 0.0038;
pAI.NotchWidth = 0.0029;
resonantFrequency(pAI)
ans = 4.5170e+09

Convert the AIAntenna to a regular inset-fed microstrip patch antenna.

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

               Length: 0.0300
                Width: 0.0300
               Height: 0.0017
            Substrate: [1x1 dielectric]
    PatchCenterOffset: [0 0]
           FeedOffset: [-0.0333 0]
       StripLineWidth: 0.0019
          NotchLength: 0.0038
           NotchWidth: 0.0029
    GroundPlaneLength: 0.0666
     GroundPlaneWidth: 0.0666
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

Version History

Introduced in R2017b

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