hornRidge

Create double-ridged rectangular horn

Since R2020b

Description

The default hornRidge object creates a double-ridged horn antenna resonating around 11GHz. The default dimensions for this antenna object are chosen for an operating frequency range of 10 GHz-12 GHz.

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

Syntax

ant = hornRidge

ant = hornRidge(Name,Value)

Description

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

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

NumFlares — Number of flares

4 (default) | 2 | 0

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

FlareLength — Length of flare

0.1784 (default) | nonnegative scalar

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

Example: 'FlareLength',0.2760

Example: ant.FlareLength = 0.2760

Data Types: double

FlareWidth — Width of flare

0.1834 (default) | nonnegative scalar

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

Example: 'FlareWidth',0.3760

Example: ant.FlareWidth = 0.3760

Data Types: double

FlareHeight — Height of flare

0.1732 (default) | nonnegative scalar

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

Example: 'FlareHeight',0.2560

Example: ant.FlareHeight = 0.2560

Data Types: double

Length — Length of waveguide

0.0538 (default) | nonnegative scalar

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

Example: 'Length',0.0676

Example: ant.Length = 0.0676

Data Types: double

Width — Width of waveguide

0.0370 (default) | nonnegative scalar

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

Example: 'Width',0.0476

Example: ant.Width = 0.0476

Data Types: double

Height — Height of waveguide

0.0177 (default) | nonnegative scalar

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

Example: 'Height',0.0340

Example: ant.Height = 0.0340

Data Types: double

RidgeLength — Length of waveguide ridge

0.0370 (default) | nonnegative scalar

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

Example: 'RidgeLength',0.0276

Example: ant.RidgeLength = 0.0276

Data Types: double

RidgeWidth — Width of waveguide ridge

0.0050 (default) | nonnegative scalar

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

Example: 'RidgeWidth',0.0040

Example: ant.RidgeWidth = 0.0040

RidgeGap — Gap between two ridges of waveguide

0.0070 (default) | nonnegative scalar

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

FeedHoleRadius — Radius of feeding hole

0.0005 (default) | nonnegative scalar

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

Example: 'FeedHoleRadius',0.0008

Example: ant.FeedHoleRadius = 0.0008

Data Types: double

FeedWidth — Width of feed

0.0001 (default) | nonnegative scalar

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

Example: 'FeedWidth',0.0002

Example: ant.FeedWidth = 0.0002

Data Types: double

FeedOffset — Signed distance from closed end of waveguide

[-0.0076 0] (default) | two-element vector

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

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) | lumpedElement object

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.

Example: Load=lumpedElement(Impedance=75)

Example: antenna.Load = lumpedElement(Impedance=75)

Tilt — Tilt angle of antenna

0 (default) | scalar | vector

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

Example: 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

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector | 2-by-3 matrix | "X" | "Y" | "Z"

Tilt axis of the antenna, specified as one of these values:

• 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, specified as a 2-by-3 matrix corresponding to two three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points.

• "x", "y", or "z" to describe a rotation about the x-, y-, or z-axis, respectively.

For more information, see Rotate Antennas and Arrays.

Example: [0 1 0]

Example: [0 0 0;0 1 0]

Example: "Z"

Data Types: double | string

Object Functions

axialRatio	Calculate and plot axial ratio of antenna or array
bandwidth	Calculate and plot absolute bandwidth of antenna or array
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 or create AI-based antenna from antenna catalog objects
efficiency	Calculate and plot radiation efficiency of antenna or array
EHfields	Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrent	Calculate current at feed for antenna or array
impedance	Calculate and plot input impedance of antenna or scan impedance of array
info	Display information about antenna, array, or platform
memoryEstimate	Estimate memory required to solve antenna or array mesh
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwrite	Write antenna or array analysis data to MSI planet file
optimize	Optimize antenna or array using SADEA optimizer
pattern	Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array
patternAzimuth	Azimuth plane radiation pattern of antenna or array
patternElevation	Elevation plane radiation pattern of antenna or array
peakRadiation	Calculate and mark maximum radiation points of antenna or array on radiation pattern
rcs	Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequency	Calculate and plot resonant frequency of antenna
returnLoss	Calculate and plot return loss of antenna or scan return loss of array
show	Display antenna, array structures, shapes, or platform
sparameters	Calculate S-parameters for antenna or array
stlwrite	Write mesh information to STL file
vswr	Calculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

Default Ridged Horn Antenna and Radiation Pattern

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)

Plot the radiation pattern of the antenna at 11 GHz.

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

Radiation Pattern of Ridged Horn Antenna with Two Flares

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)

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)

Version History

Introduced in R2020b