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hornCorrugated

Create rectangular corrugated-horn antenna

Since R2020b

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Description

The default hornCorrugated object creates a rectangular corrugated-horn antenna with grooves on the inner walls of the flare, resonating around 15 GHz. These antennas provide spillover reduction and have beam symmetry and a low sidelobe level, so they are widely used as a feed in reflector antennas in broadcasting communications.

Rectangular corrugated horn antenna geometry, default radiation pattern, and impedance plot.

Creation

Syntax

ant = hornCorrugated
ant = hornCorrugated(Name,Value)

Description

ant = hornCorrugated creates a rectangular corrugated-horn antenna with default property values. The default dimensions are chosen for an operating frequency of around 15 GHz.

example

ant = hornCorrugated(Name,Value) sets Properties using one or more name-value pairs. For example, ant = hornCorrugated('FlareLength', 0.045) creates a rectangular corrugated-horn antenna with the flare length of the horn set to 45 mm.

Properties

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Flare length of the horn, specified as a positive scalar in meters.

Example: 'FlareLength',0.35

Data Types: double

Flare width of the horn, specified as a positive scalar in meters.

Example: 'FlareWidth',0.2

Data Types: double

Flare height of the horn, specified as a positive scalar in meters.

Example: 'FlareHeight',0.15

Data Types: double

Length of the rectangular waveguide, specified as a positive scalar in meters.

Example: 'Length',0.09

Data Types: double

Width of the rectangular waveguide, specified as a positive scalar in meters.

Example: 'Width',0.05

Data Types: double

Height of the rectangular waveguide, specified as a positive scalar in meters.

Example: 'Height',0.0200

Data Types: double

Height of the feed, specified as a positive scalar in meters.

Example: 'FeedHeight',0.0050

Data Types: double

Width of the feed, specified as a positive scalar in meters.

Example: 'FeedWidth',5e-05

Data Types: double

Signed distance of the feedpoint from the center of the ground plane, specified as a two-element vector in meters.

Example: 'FeedOffset',[–0.0070 0.01]

Data Types: double

Distance between two successive corrugations, specified as a positive scalar in meters.

Example: 'Pitch',0.0060

Example: ant.Pitch = 0.0090

Data Types: double

Distance of the first corrugation from the waveguide, specified as a positive scalar in meters.

Example: 'FirstCorrugatedDistance',0.0360

Example: ant.FirstCorrugatedDistance = 0.0190

Data Types: double

Corrugation width, specified as a positive scalar in meters.

Example: 'CorrugateWidth',0.0058

Example: ant.CorrugateWidth = 0.0019

Data Types: double

Corrugation depth, specified as a two-element vector in meters. The first element corresponds to the width along E-plane, and the second element corresponds to the width along the H-plane.

Example: 'CorrugateDepth',[0.006 0.0560]

Example: ant.CorrugateDepth = [0.0050 0.0790]

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

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

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: ant.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.

Data Types: double

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: ant.TiltAxis = 'Z'

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: 'Load',lumpedElement. lumpedElement is the object for the load created using lumpedElement.

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

Object Functions

axialRatioCalculate and plot axial ratio of antenna or array
bandwidthCalculate and plot absolute bandwidth of antenna or array
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
efficiencyCalculate and plot radiation efficiency of antenna or array
EHfieldsElectric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrentCalculate current at feed for antenna or array
impedanceCalculate and plot input impedance of antenna or scan impedance of array
infoDisplay information about antenna, array, or platform
memoryEstimateEstimate memory required to solve antenna or array mesh
meshMesh properties of metal, dielectric antenna, or array structure
meshconfigChange meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwriteWrite antenna or array analysis data to MSI planet file
numCorrugationsToPitchCalculate pitch for specified corrugations
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
peakRadiationCalculate and mark maximum radiation points of antenna or array on radiation pattern
rcsCalculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequencyCalculate and plot resonant frequency of antenna
returnLossCalculate and plot return loss of antenna or scan return loss of array
showDisplay antenna, array structures, shapes, or platform
sparametersCalculate S-parameters for antenna or array
stlwriteWrite mesh information to STL file
vswrCalculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

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Open Live Script

Create a default corrugated rectangular horn antenna. 

ant = hornCorrugated
ant = 
  hornCorrugated with properties:

               FlareLength: 0.0428
                FlareWidth: 0.0900
               FlareHeight: 0.0800
                    Length: 0.0229
                     Width: 0.0102
                    Height: 0.0075
                 FeedWidth: 8.0000e-05
                FeedHeight: 0.0037
                FeedOffset: [-0.0020 0]
    FirstCorrugateDistance: 0.0160
            CorrugateDepth: [0.0050 0.0100]
            CorrugateWidth: 0.0030
                     Pitch: 0.0060
                 Conductor: [1x1 metal]
                      Tilt: 0
                  TiltAxis: [1 0 0]
                      Load: [1x1 lumpedElement]

View the antenna using the show function.

show(ant)

Figure contains an axes object. The axes object with title hornCorrugated antenna element, xlabel x (mm), ylabel y (mm) contains 3 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at a frequency 15.28 GHz.

p = PatternPlotOptions(MagnitudeScale=[-15 10]);
pattern(ant,15.28e9, PatternOptions=p)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 3 objects of type patch, surface. Hidden axes object 2 contains 17 objects of type surface, line, text, patch.

References

[1] Encinar, J., and J. Rebollar. “A Hybrid Technique for Analyzing Corrugated and Noncorrugated Rectangular Horns.” IEEE Transactions on Antennas and Propagation, vol. 34, no. 8, Aug. 1986, pp. 961–68.

Version History

Introduced in R2020b

See Also

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