patchMicrostripInsetfed

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

Description

Use the default patchMicrostripInsetfed object to create an inset-fed microstrip patch antenna resonating around 3.03 GHz. 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.

Creation

Syntax

insetpatch = patchMicrostripInsetfed

insetpatch = patchMicrostripInsetfed(Name=Value)

Description

insetpatch = patchMicrostripInsetfed creates an inset-fed microstrip patch antenna centered at the origin with default property values. The default dimensions are chosen for an operating frequency of around 3.03 GHz.

insetpatch = patchMicrostripInsetfed(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, 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

Length — Patch length along x-axis

0.0300 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

Width — Patch width along y-axis

0.0290 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

Height — Patch height along z-axis

0.0013 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

GroundPlaneLength — Ground plane length along x-axis

0.0600 (default) | positive scalar

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

GroundPlaneWidth — Ground plane width along y-axis

0.0600 (default) | positive scalar

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

Substrate — Type of dielectric material

"Air" (default) | dielectric object

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")

PatchCenterOffset — Signed distance of patch from origin

[0 0] (default) | two-element real vector

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

FeedOffset — Signed distance of feed from origin

[–0.0300 0] (default) | two-element real vector

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

StripLineWidth — Strip line width along y-axis

1.0000e-03 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

NotchLength — Notch length along x-axis

0.0080 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

NotchWidth — Notch width along y-axis

0.0030 (default) | positive scalar | tunable for patchMicrostripInsetfed type AIAntenna

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

Conductor — Type of metal material

"PEC" (default) | metal object

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")

Load — Lumped elements

[1x1 lumpedElement] (default) | lumpedElement object

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 — Tilt angle of antenna

0 (default) | scalar | vector

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

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector | 2-by-3 matrix | "X" | "Y" | "Z"

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

axialRatio	Calculate and plot axial ratio of antenna or array
bandwidth	Calculate and plot absolute bandwidth of antenna or array
beamwidth	Beamwidth of antenna
charge	Charge distribution on antenna or array surface
current	Current distribution on antenna or array surface
design	Design prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects
efficiency	Calculate and plot radiation efficiency of antenna or array
EHfields	Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrent	Calculate current at feed for antenna or array
impedance	Calculate and plot input impedance of antenna or scan impedance of array
info	Display information about antenna, array, or platform
memoryEstimate	Estimate memory required to solve antenna or array mesh
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwrite	Write antenna or array analysis data to MSI planet file
optimize	Optimize antenna or array using SADEA optimizer
pattern	Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array
patternAzimuth	Azimuth plane radiation pattern of antenna or array
patternElevation	Elevation plane radiation pattern of antenna or array
peakRadiation	Calculate and mark maximum radiation points of antenna or array on radiation pattern
rcs	Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequency	Calculate and plot resonant frequency of antenna
returnLoss	Calculate and plot return loss of antenna or scan return loss of array
show	Display antenna, array structures, shapes, or platform
sparameters	Calculate S-parameters for antenna or array
stlwrite	Write mesh information to STL file
vswr	Calculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

Inset-Fed Microstrip Patch

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)

Create AI Model Based Inset-fed Microstrip Patch Antenna

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 = 
4.5220e+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

R2023b: AI model based antenna analysis

Design, tune, and analyze this antenna using an AI model. Using AI-based antenna models over conventional full-wave solvers significantly reduces the simulation time required to fine-tune the antenna to meet your design goals. Set the ForAI argument in the design function to true to create a patchMicrostripInsetfed type AIAntenna. To use this feature, you need license to the Statistics and Machine Learning Toolbox™ in addition to the Antenna Toolbox™.