patchMicrostripEnotch

Create probe-fed E-shaped microstrip patch antenna

Description

Use the patchMicrostripEnotch object to create a probe-fed E-shaped microstrip patch antenna. The default patch is centered at the origin with the feedpoint along the length. By default, the dimensions are chosen for an operating frequency of 6.6 GHz for air or 5.5 GHz for Teflon.

Creation

Description

example

epatch = patchMicrostripEnotch creates an E-shaped microstrip patch antenna.

example

epatch = patchMicrostripEnotch(Name,Value) sets properties using one or more name-value pairs. For example, epatch = patchMicrostripEnotch('Width',0.2) creates a microstrip E-patch with a patch width of 0.2 m. Enclose each property name in quotes.

Properties

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Patch length along X-axis, specified as a scalar in meters.

Example: 'Length',0.9

Example: epatch.Length = 0.9

Data Types: double

Patch width along Y-axis, specified as a scalar in meters.

Example: 'Width',0.0500

Example: epatch.Width = 0.0500

Data Types: double

Patch height above ground plane along Z-axis, specified as a scalar in meters.

Example: 'Height',0.00500

Example: epatch.Height = 0.00500

Data Types: double

Notch length on center E-arm along X-axis, specified as a scalar in meters.

Example: 'CenterArmNotchLength',0.100

Example: epatch.CenterArmNotchLength = 0.100

Data Types: double

Notch width on center E-arm along Y-axis, specified as a scalar in meters.

Example: 'CenterArmNotchWidth',0.0600

Example: epatch.CenterArmNotchWidth = 0.0600

Data Types: double

Notch length along X-axis, specified as a scalar in meters.

Example: 'NotchLength',0.0200

Example: epatch.NotchLength = 0.0200

Data Types: double

Notch width along Y-axis, specified as a scalar in meters.

Example: 'NotchWidth',0.00600

Example: epatch.NotchWidth = 0.00600

Data Types: double

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

Example: 'GroundPlaneLength',120e-3

Example: epatch.GroundPlaneLength = 120e-3

Data Types: double

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

Example: 'GroundPlaneWidth',120e-3

Example: epatch.GroundPlaneWidth = 120e-3

Data Types: double

Signed distance of patch from origin, specified as a two-element real-valued vector. Units are 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: 'PatchCenterOffset',[0.01 0.01]

Example: epatch.PatchCenterOffset = [0.01 0.01]

Data Types: double

Signed distance of feed from origin, specified as a two-element real-valued vector. Units are in meters. Use this property to adjust the location of the feedpoint relative to the ground plane and patch. Distances are measured along the length and width of the ground plane.

Example: 'FeedOffset',[0.01 0.01]

Example: epatch.FeedOffset = [0.01 0.01]

Data Types: double

Feed diameter, specified as a scalar in meters.

Example: 'FeedDiameter',0.0600

Example: epatch.FeedDiameter = 0.0600

Data Types: double

Type of dielectric material used as a substrate, specified as a dielectric object. You place the patch over this dielectric substrate. For more information, see dielectric. For more information on dielectric substrate meshing, see Meshing.

Note

The substrate dimensions must be equal to the groundplane dimensions.

Example: d = dielectric('FR4'); 'Substrate',d

Example: d = dielectric('FR4'); epatch.Substrate = d

Lumped elements added to the antenna feed, specified as a lumped element object. You can add a load anywhere on the surface of the antenna. By default, the load is at the origin. For more information, see lumpedElement.

Example: 'Load',lumpedelement, where lumpedelement is the object handle for the load created using lumpedElement.

Example: epatch.Load = lumpedElement('Impedance',75)

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

Example: 'Tilt',90

Example: 'Tilt',[90 90],'TiltAxis',[0 1 0;0 1 1] tilts the antenna at 90 degree about two axes, defined by vectors.

Data Types: double

Tilt axis of the antenna, specified as:

  • Three-element vectors of Cartesian coordinates in meters. In this case, each vector starts at the origin and lies along the specified points on the X-, Y-, and Z-axes.

  • Two points in space, each specified as three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points in space.

  • A string input describing simple rotations around one of the principal axes, 'X', 'Y', or 'Z'.

For more information, see Rotate Antennas and Arrays.

Example: 'TiltAxis',[0 1 0]

Example: 'TiltAxis',[0 0 0;0 1 0]

Example: ant.TiltAxis = 'Z'

Object Functions

showDisplay antenna or array structure; Display shape as filled patch
axialRatioAxial ratio of antenna
beamwidthBeamwidth of antenna
chargeCharge distribution on metal or dielectric antenna or array surface
currentCurrent distribution on metal or dielectric antenna or array surface
designDesign prototype antenna or arrays for resonance at specified frequency
EHfieldsElectric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedanceInput impedance of antenna; scan impedance of array
meshMesh properties of metal or dielectric antenna or array structure
meshconfigChange mesh mode of antenna structure
patternRadiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuthAzimuth pattern of antenna or array
patternElevationElevation pattern of antenna or array
returnLossReturn loss of antenna; scan return loss of array
sparametersS-parameter object
vswrVoltage standing wave ratio of antenna

Examples

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Create and view a default E-shaped patch antenna.

epatch = patchMicrostripEnotch
epatch = 
  patchMicrostripEnotch with properties:

                  Length: 0.0172
                   Width: 0.0200
             NotchLength: 0.0100
              NotchWidth: 1.0000e-03
    CenterArmNotchLength: 0.0028
     CenterArmNotchWidth: 0.0062
                  Height: 0.0032
               Substrate: [1x1 dielectric]
       GroundPlaneLength: 0.0250
        GroundPlaneWidth: 0.0300
       PatchCenterOffset: [0 0]
              FeedOffset: [-0.0034 0]
            FeedDiameter: 0.0013
                    Tilt: 0
                TiltAxis: [1 0 0]
                    Load: [1x1 lumpedElement]

show(epatch)

Create and view an E-shaped patch with no slot on the center E-arm.

epatch = patchMicrostripEnotch('CenterArmNotchLength',0);
show(epatch);

Introduced in R2018a