hornCorrugated

Create rectangular corrugated-horn antenna

Since R2020b

Description

The hornCorrugated object creates a rectangular corrugated-horn antenna with grooves on the inner walls of the flare. 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.

Creation

Syntax

ant = hornCorrugated

ant = hornCorrugated(Name,Value)

Description

ant = hornCorrugated creates a rectangular corrugated-horn antenna for a resonant frequency around 15 GHz.

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

FlareLength — Flare length of horn

0.0428 (default) | positive scalar

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

Example: 'FlareLength',0.35

Data Types: double

FlareWidth — Flare width of horn

0.09 (default) | positive scalar

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

Example: 'FlareWidth',0.2

Data Types: double

FlareHeight — Flare height of horn

0.06 (default) | positive scalar

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

Example: 'FlareHeight',0.15

Data Types: double

Length — Length of rectangular waveguide

0.0229 (default) | positive scalar

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

Example: 'Length',0.09

Data Types: double

Width — Width of rectangular waveguide

0.0102 (default) | positive scalar

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

Example: 'Width',0.05

Data Types: double

Height — Height of rectangular waveguide

0.0075 (default) | positive scalar

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

Example: 'Height',0.0200

Data Types: double

FeedHeight — Height of feed

0.0037 (default) | positive scalar

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

Example: 'FeedHeight',0.0050

Data Types: double

FeedWidth — Width of feed

0.00008 (default) | positive scalar

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

Example: 'FeedWidth',5e-05

Data Types: double

FeedOffset — Signed distance of feedpoint from center of ground plane

[–0.0020 0] (default) | two-element vector

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

Pitch — Distance between two successive corrugations

0.0060 (default) | positive scalar

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

Example: 'Pitch',0.0060

Example: ant.Pitch = 0.0090

Data Types: double

FirstCorrugatedDistance — Distance of first corrugation from waveguide

0.016 (default) | positive scalar

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

CorrugateWidth — Corrugation width

0.003 (default) | positive scalar

Corrugation width, specified as a positive scalar in meters.

Example: 'CorrugateWidth',0.0058

Example: ant.CorrugateWidth = 0.0019

Data Types: double

CorrugateDepth — Corrugation depth

[0.0050 0.0100] (default) | two-element vector

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

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

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: 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

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: ant.TiltAxis = 'Z'

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. 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

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
numCorrugationsToPitch	Calculate pitch for specified corrugations
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

Create Rectangular Corrugated-Horn Antenna and Plot Radiation Pattern

Create a default rectangular corrugated-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)

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

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

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