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hornConical

Create conical horn antenna

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Description

The default hornConical object creates a waveguide shaped like a cone resonating around 9.26 GHz. This type of horn is widely used as feed element for large radio astronomy telescopes, satellite tracking, and communication dishes.

Creation

Syntax

ant = hornConical
ant = hornConical(Name=Value)

Description

ant = hornConical creates a conical horn antenna with default property values. The default dimensions are chosen for an operating frequency of around 9.26 GHz.

example

ant = hornConical(Name=Value) sets properties using one or more name–value arguments. Name is the property name and Value is the corresponding value. You can specify several name-value arguments in any order as Name1=Value1,...,NameN=ValueN. Properties that you do not specify, retain their default values.

For example, ant = hornConical(Radius=1) creates a conical horn antenna with a radius of 1 meter.

example

Properties

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

Example: 0.760

Data Types: double

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

Example: 0.0340

Data Types: double

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

Example: 0.0085

Data Types: double

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

Example: 0.0200

Data Types: double

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

Example: 0.03627

Data Types: double

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

Example: 0.0540

Data Types: double

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

Example: 0.0760

Data Types: double

Type of the metal used as a conductor, specified as a metal object. You can choose any metal from the MetalCatalog or specify a metal of your choice. For more information on metal conductor meshing, see Meshing.

Example: metal("Copper")

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 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

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
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 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 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.

Open Live Script

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)

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 S-parameters and the impedance of the antenna.

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

Figure contains an axes object. The axes object with xlabel Frequency (GHz), ylabel Magnitude (dB) contains an object of type line. This object represents dB(S_{11}).

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

Figure contains an axes object. The axes object with title Impedance, xlabel Frequency (GHz), ylabel Impedance (ohms) contains 2 objects of type line. One or more of the lines displays its values using only markers These objects represent Resistance, Reactance.

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

See Also

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