Main Content

hornRidge

Create double-ridged rectangular horn

Description

The hornRidge object creates a double-ridged horn antenna with the default dimensions chosen for an operating frequency range of 10 GHz-12 GHz.

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

Ridged horn antennas are commonly used in electromagnetic interference and compatibility applications for generating electromagnetic fields. These antennas are also used in radio astronomy or radar cross-section (RCS) measurements.

Creation

Description

example

ant = hornRidge creates a double-ridged horn antenna with the default dimensions chosen for an operating frequency range of 10 GHz-12 GHz.

example

ant = hornRidge(Name,Value) sets properties using one or more name-value pairs. For example, ant = hornRidge('FlareLength',178.38e-3) creates a ridged horn antenna object with a flare length of 178.39 millimeters.

Properties

expand all

Number of flares, specified as 0, 2, or 4. Specify zero if you do not want any flares.

Example: 'NumFlares',2

Example: ant.NumFlares = 2

Data Types: double

Length of the flare, specified as a nonnegative scalar in meters.

Example: 'FlareLength',0.2760

Example: ant.FlareLength = 0.2760

Data Types: double

Width of the flare, specified as a nonnegative scalar in meters.

Example: 'FlareWidth',0.3760

Example: ant.FlareWidth = 0.3760

Data Types: double

Height of the flare, specified as a nonnegative scalar in meters.

Example: 'FlareHeight',0.2560

Example: ant.FlareHeight = 0.2560

Data Types: double

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

Example: 'Length',0.0676

Example: ant.Length = 0.0676

Data Types: double

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

Example: 'Width',0.0476

Example: ant.Width = 0.0476

Data Types: double

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

Example: 'Height',0.0340

Example: ant.Height = 0.0340

Data Types: double

Length of the waveguide ridge, specified as a nonnegative scalar in meters.

Example: 'RidgeLength',0.0276

Example: ant.RidgeLength = 0.0276

Data Types: double

Width of the waveguide ridge, specified as a nonnegative scalar in meters.

Example: 'RidgeWidth',0.0040

Example: ant.RidgeWidth = 0.0040

Gap between the two ridges of the waveguide, specified as a nonnegative scalar in meters.

Example: 'RidgeGap',0.0060

Example: ant.RidgeGap = 0.0060

Data Types: double

Radius of the feeding hole, specified as a nonnegative scalar in meters.

Example: 'FeedHoleRadius',0.0008

Example: ant.FeedHoleRadius = 0.0008

Data Types: double

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

Example: 'FeedWidth',0.0002

Example: ant.FeedWidth = 0.0002

Data Types: double

Signed distance from the closed end of the waveguide, specified as a two-element vector with each element unit in meters.

Example: 'FeedOffset',[-0.00626 0]

Example: ant.FeedOffset = [-0.00626,0]

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

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, where lumpedElement is load added to the antenna feed.

Example: ant.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: 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.

Note

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

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'

Note

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

Data Types: double

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
efficiencyRadiation efficiency of antenna
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
optimizeOptimize antenna or array using SADEA optimizer
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

collapse all

Create and view a default double ridged horn antenna.

ant = hornRidge
ant = 
  hornRidge with properties:

         NumFlares: 4
       FlareLength: 0.1784
        FlareWidth: 0.1834
       FlareHeight: 0.1732
            Length: 0.0538
             Width: 0.0370
            Height: 0.0177
       RidgeLength: 0.0370
        RidgeWidth: 0.0050
          RidgeGap: 0.0070
    FeedHoleRadius: 5.0000e-04
         FeedWidth: 1.0000e-04
        FeedOffset: [-0.0076 0]
         Conductor: [1x1 metal]
              Tilt: 0
          TiltAxis: [1 0 0]
              Load: [1x1 lumpedElement]

show(ant)

Figure contains an axes. The axes with title hornRidge antenna element contains 16 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at 11 GHz.

p = PatternPlotOptions('MagnitudeScale',[0 20]);
figure;
pattern(ant,11e9,'patternOptions',p);

Figure contains an axes and other objects of type uicontrol. The axes contains 16 objects of type patch, surface.

Create and view a ridged horn antenna with 2 flares.

ant = hornRidge('NumFlares',2)
ant = 
  hornRidge with properties:

         NumFlares: 2
       FlareLength: 0.1784
        FlareWidth: 0.1834
       FlareHeight: 0.1732
            Length: 0.0538
             Width: 0.0370
            Height: 0.0177
       RidgeLength: 0.0370
        RidgeWidth: 0.0050
          RidgeGap: 0.0070
    FeedHoleRadius: 5.0000e-04
         FeedWidth: 1.0000e-04
        FeedOffset: [-0.0076 0]
         Conductor: [1x1 metal]
              Tilt: 0
          TiltAxis: [1 0 0]
              Load: [1x1 lumpedElement]

show(ant)

Figure contains an axes. The axes with title hornRidge antenna element contains 16 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at 11 GHz.

p = PatternPlotOptions('MagnitudeScale',[0 20])
p = 
  PatternPlotOptions with properties:

      Transparency: 1
         SizeRatio: 0.9000
    MagnitudeScale: [0 20]
     AntennaOffset: [0 0 0]

figure;
pattern(ant,11e9,'patternOptions',p)

Figure contains an axes and other objects of type uicontrol. The axes contains 16 objects of type patch, surface.

Introduced in R2020b