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hornConical

Create conical horn antenna

Since R2019b

Description

The hornConical object creates a waveguide shaped like a cone to direct radio waves in a beam. This type of horn is widely used as feed element for large radio astronomy telescopes, satellite tracking, and communication dishes.

Creation

Description

example

ant = hornConical creates a conical horn antenna with dimensions for an operating frequency of 7.58 GHz.

example

ant = hornConical(Name,Value) sets properties using one or more name-value pairs. For example, ant = hornConical('Radius',1) creates a conical horn antenna with a radius of 1 meter.

Properties

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Radius of the waveguide, specified as a real-valued scalar in meters.

Example: 'Radius',0.760

Example: ant.Radius = 0.760

Data Types: double

Height of the waveguide, specified as a real-valued scalar in meters.

Example: 'WaveguideHeight',0.0340

Example: ant.WaveguideHeight = 0.0340

Data Types: double

Height of the feed, specified as a real-valued scalar in meters.

Example: 'FeedHeight',0.0085

Example: ant.FeedHeight = 0.0085

Data Types: double

Width of the feed, specified as a real-valued scalar in meters.

Example: 'FeedWidth',0.0200

Example: ant.FeedWidth = 0.0200

Data Types: double

Signed distances along the y-axis, specified as a real-valued scalar in meters.

Example: 'FeedOffset',0.03627

Example: ant.FeedOffset = 0.3627

Data Types: double

Height of the cone, specified as a real-valued scalar in meters.

Example: 'ConeHeight',0.0540

Example: ant.ConeHeight = 0.0540

Data Types: double

Radius of the cone aperture, specified as a real-valued scalar in meters.

Example: 'ApertureRadius',0.0760

Example: ant.ApertureRadius = 0.0760

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 lumped element 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)

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

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

showDisplay antenna, array structures, shapes, or platform
axialRatioAxial ratio of antenna
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
efficiencyRadiation efficiency of antenna
EHfieldsElectric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
impedanceInput impedance of antenna or scan impedance of array
meshMesh properties of metal, dielectric antenna, or array structure
meshconfigChange meshing mode of antenna, array, custom antenna, custom array, or custom geometry
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
rcsCalculate and plot radar cross section (RCS) of platform, antenna, or array
returnLossReturn loss of antenna or scan return loss of array
sparametersCalculate S-parameters for antennas and antenna arrays
vswrVoltage standing wave ratio (VSWR) of antenna or array element

Examples

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Create and view a default conical horn antenna.

ant = hornConical
ant = 
  hornConical with properties:

             Radius: 0.0120
    WaveguideHeight: 0.0300
         FeedHeight: 0.0075
          FeedWidth: 0.0030
         FeedOffset: 0.0100
         ConeHeight: 0.0348
     ApertureRadius: 0.0350
          Conductor: [1x1 metal]
               Tilt: 0
           TiltAxis: [1 0 0]
               Load: [1x1 lumpedElement]

show(ant)

Figure contains an axes object. The axes object with title hornConical 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 7.58 GHz.

pattern(ant,7.58e9)

Figure contains an axes object and other objects of type uicontrol. The axes object contains 3 objects of type patch, surface.

Create a conical horn antenna with the following dimensions.

ant=hornConical(Radius=35.71e-3, WaveguideHeight=200e-3,...
       Feedwidth=26e-3, FeedHeight=34.71e-3, FeedOffset=42.42e-3,...
       ConeHeight=130e-3, ApertureRadius=62.5e-3);
show(ant);

Plot the S-parameters and the impedance of the antenna.

s=sparameters(ant,2.5e9:20e6:4e9);
rfplot(s);

figure
impedance(ant,2.5e9,20e6:4e9); 

References

[1] Jadhav, Rohini.P, Vinithkurnar Javnrakash Dongre, Arunkumar Heddallikar. "Design of X-Band Conical Horn Antenna Using Coaxial Feed and Improved Design Technique for Bandwidth Enhancement." In International Conference on Computing, Communication, Control, and Automation (ICCUBEA), 1-6. Pune, India: ICCUBEA 2017

Version History

Introduced in R2019b