patchMicrostripHnotch

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 feedpoint along the length. By default, the dimensions are chosen for an operating frequency of 3.49 GHz for air or 2.61 GHz for Teflon.

Creation

Syntax

ant = patchMicrostripHnotch

ant = patchMicrostripHnotch(Name,Value)

Description

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

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

Properties

Length — Patch length along x-axis

0.0290 (default) | scalar

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

Example: 'Length',0.0450

Example: ant.Length = 0.0450

Data Types: double

Width — Patch width along y-axis

0.0300 (default) | scalar

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

Example: 'Width',0.0500

Example: ant.Width = 0.0500

Data Types: double

NotchLength — Notch length along x-axis

0.0065 (default) | scalar

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

Example: 'NotchLength',0.0200

Example: ant.NotchLength = 0.0200

Data Types: double

NotchWidth — Notch width along y-axis

0.0076 (default) | scalar

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

Example: 'NotchWidth',0.00600

Example: ant.NotchWidth = 0.00600

Data Types: double

Height — Patch height above ground plane along z-axis

0.0016 (default) | scalar

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

Example: 'Height',0.00500

Example: ant.Height = 0.00500

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. For more information see, dielectric.

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

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

Data Types: string | char

GroundPlaneLength — Ground plane length along x-axis

0.0435 (default) | scalar

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: 'GroundPlaneLength',120e-3

Example: ant.GroundPlaneLength = 120e-3

Data Types: double

GroundPlaneWidth — Ground plane width along y-axis

0.0450 (default) | scalar

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: 'GroundPlaneWidth',120e-3

Example: ant.GroundPlaneWidth = 120e-3

Data Types: double

PatchCenterOffset — Signed distance of patch from origin

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

Signed distance of the patch from the origin, specified as a two-element real-valued vector with each element unit 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: ant.PatchCenterOffset = [0.01 0.01]

Data Types: double

FeedOffset — Signed distance of feed from origin

[–0.0025 -0.0050] (default) | two-element real-valued vector

Signed distance of the feed from the origin, specified as a two-element real-valued vector with each element unit 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: ant.FeedOffset = [0.01 0.01]

Data Types: double

FeedDiameter — Feed diameter

1.0000e-03 (default) | scalar

Feed diameter, specified as a scalar in meters.

Example: 'FeedDiameter',0.0600

Example: ant.FeedDiameter = 0.0600

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: 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: ant.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 Microstrip Patch H-Notch

Create and view a microstrip patch H-notch with default property values.

ant = patchMicrostripHnotch;
show(ant)

Microstrip Patch H-Notch with Dielectric Substrate

Create an H-shaped patch with dielectric substrate of permittivity 2.33.

ant = patchMicrostripHnotch('Substrate',dielectric('EpsilonR',2.33,'LossTangent',0.0012));
show(ant);

Version History

Introduced in R2019a