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

Syntax

epatch = patchMicrostripEnotch

epatch = patchMicrostripEnotch(Name,Value)

Description

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

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

Length — Patch length along x-axis

0.0172 (default) | scalar

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

Example: 'Length',0.9

Example: epatch.Length = 0.9

Data Types: double

Width — Patch width along y-axis

0.0200 (default) | scalar

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

Example: 'Width',0.0500

Example: epatch.Width = 0.0500

Data Types: double

Height — Patch height above ground plane along z-axis

0.0032 (default) | scalar

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

CenterArmNotchLength — Notch length on center E-arm along x-axis

0.0028 (default) | scalar

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

CenterArmNotchWidth — Notch width on center E-arm along y-axis

0.0062 (default) | scalar

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

NotchLength — Notch length along x-axis

0.0100 (default) | scalar

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

Example: 'NotchLength',0.0200

Example: epatch.NotchLength = 0.0200

Data Types: double

NotchWidth — Notch width along y-axis

1.00003-03 (default) | scalar

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

Example: 'NotchWidth',0.00600

Example: epatch.NotchWidth = 0.00600

Data Types: double

GroundPlaneLength — Ground plane length along x-axis

0.0250 (default) | scalar

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

Example: 'GroundPlaneLength',120e-3

Example: epatch.GroundPlaneLength = 120e-3

Data Types: double

GroundPlaneWidth — Ground plane width along y-axis

0.0300 (default) | scalar

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

Example: 'GroundPlaneWidth',120e-3

Example: epatch.GroundPlaneWidth = 120e-3

Data Types: double

PatchCenterOffset — Signed distance of patch from origin

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

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

FeedOffset — Signed distance of feed from origin

[–0.0034 0] (default) | two-element real-valued vector

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

FeedDiameter — Feed diameter

0.0013 (default) | scalar

Feed diameter, specified as a scalar in meters.

Example: 'FeedDiameter',0.0600

Example: epatch.FeedDiameter = 0.0600

Data Types: double

Substrate — Type of dielectric material

'Air' (default) | dielectric object

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

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: m = metal('Copper'); 'Conductor',m

Example: m = metal('Copper'); ant.Conductor = m

Load — Lumped elements

[1x1 lumpedElement] (default) | lumped element object

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 for the load created using lumpedElement.

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

Tilt — Tilt angle of antenna

0 (default) | scalar | vector

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 degrees about the two axes defined by the vectors.

Note

The wireStack antenna object only accepts the dot method to change its properties.

Data Types: double

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector of Cartesian coordinates | two three-element vectors of Cartesian coordinates | 'X' | 'Y' | 'Z'

Tilt axis of the antenna, specified as:

• 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, 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: TiltAxis = 'Z'

Data Types: double

Object Functions

show	Display antenna, array structures or shapes
axialRatio	Axial ratio of antenna
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
efficiency	Radiation efficiency of antenna
EHfields	Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedance	Input impedance of antenna; scan impedance of array
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change mesh mode of antenna structure
optimize	Optimize antenna or array using SADEA optimizer
pattern	Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuth	Azimuth pattern of antenna or array
patternElevation	Elevation pattern of antenna or array
rcs	Calculate and plot radar cross section (RCS) of platform, antenna, or array
returnLoss	Return loss of antenna; scan return loss of array
sparameters	Calculate S-parameter for antenna and antenna array objects
vswr	Voltage standing wave ratio of antenna

Examples

Default E-Shaped Patch Antenna

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
               Conductor: [1x1 metal]
                    Tilt: 0
                TiltAxis: [1 0 0]
                    Load: [1x1 lumpedElement]

show(epatch)

E-Shaped Patch with No Slot Along Center E-Arm

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

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

Version History

Introduced in R2018a