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quadCustom

Create Yagi-Uda custom array antenna

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Description

The default quadCustom object creates a Yagi-Uda custom array along the z-axis resonating around 2.44 GHz.

Creation

Syntax

ant = quadCustom
ant = quadCustom(Name=Value)

Description

ant = quadCustom creates a half-wavelength Yagi-Uda custom array antenna along the z-axis with default property values. The default antenna is excited using a dipole and consists of three directors and one reflector. The default dimensions are chosen for an operating frequency of around 2.44 GHz.

example

ant = quadCustom(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 = quadCustom(Exciter=dipoleFolded) creates a Yagi-Uda custom array antenna with a folded dipole antenna as the exciter.

Properties

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Antenna type used as an exciter, specified as a dipoleFolded, biquad, dipole, or loopCircular antenna object. This quadCustom supports a single exciter.

Example: dipoleFolded

Antenna type or antenna shape used as director elements, specified as a cell array consisting of one or more of the following antennas: dipole, dipoleVee, biquad, loopRectangular, loopCircular, antenna.Polygon, antenna.Circle, or antenna.Rectangle. You can use single or multiple antenna elements as directors.

Example: d = dipoleVee; ant = quadCustom(Director={d d d d}). Yagi-Uda custom array antenna uses V-dipole as its directors.

Spacing between the director elements, specified as a real-valued scalar in meters or a vector with each element unit in meters. You can specify a scalar value for equal spacing between the elements and vector value for unequal spacing between the elements. If you use a vector, the first value is the distance between the exciter and the first director element.

Example: [0.234 0.324]

Data Types: double

Antenna type used as reflector elements, specified as a cell array. You can use single or multiple antenna elements as reflectors.

Example: d = dipoleVee; ant = quadCustom(Reflector={d d d d}) Yagi-Uda custom array antenna uses V- dipole as its reflectors.

Spacing between the reflector elements, specified as a real-valued scalar in meters or a vector with each element unit in meters. You can specify a scalar value for equal spacing between the elements or a vector value for unequal spacing between the elements. If you use a vector, the first value is the distance between the exciter and the first reflector element.

Example: [0.234 0.324]

Data Types: double

Length of the boom, specified as a real-valued scalar in meters.

Example: 0.234

Data Types: double

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

Example: 0.00324

Data Types: double

Signed distance from center of antenna elements, specified as a three-element vector with each element unit in meters.

Example: [0 0.0060 0.0350]

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

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 custom Yagi-Uda array antenna.

ant = quadCustom
ant = 
  quadCustom with properties:

             Exciter: [1x1 dipole]
            Director: {[1x1 dipole]  [1x1 dipole]  [1x1 dipole]}
     DirectorSpacing: 0.0423
           Reflector: {[1x1 dipole]}
    ReflectorSpacing: 0.0308
          BoomLength: 0.1800
           BoomWidth: 0.0020
          BoomOffset: [0 0.0050 0.0450]
           Conductor: [1x1 metal]
                Tilt: 0
            TiltAxis: [1 0 0]
                Load: [1x1 lumpedElement]


show(ant)

Figure contains an axes object. The axes object with title quadCustom antenna element, xlabel x (mm), ylabel y (mm) contains 9 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at 2.4 GHz.

pattern(ant,2.4e9)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 9 objects of type patch, surface. Hidden axes object 2 contains 20 objects of type surface, line, text, patch.

Open Live Script

Create the default quadCustom, change the number of directors to seven, and view the structure. 

 ant = design(dipole,2.4e9);
 ant.Tilt = 90
ant = 
  dipole with properties:

        Length: 0.0587
         Width: 0.0012
    FeedOffset: 0
     Conductor: [1x1 metal]
          Tilt: 90
      TiltAxis: [1 0 0]
          Load: [1x1 lumpedElement]


 ant.TiltAxis = [0 1 0]
ant = 
  dipole with properties:

        Length: 0.0587
         Width: 0.0012
    FeedOffset: 0
     Conductor: [1x1 metal]
          Tilt: 90
      TiltAxis: [0 1 0]
          Load: [1x1 lumpedElement]


 quad_ant = quadCustom(Director={ant,ant,ant,ant,ant,ant,ant})
quad_ant = 
  quadCustom with properties:

             Exciter: [1x1 dipole]
            Director: {[1x1 dipole]  [1x1 dipole]  [1x1 dipole]  [1x1 dipole]  [1x1 dipole]  [1x1 dipole]  [1x1 dipole]}
     DirectorSpacing: 0.0423
           Reflector: {[1x1 dipole]}
    ReflectorSpacing: 0.0308
          BoomLength: 0.1800
           BoomWidth: 0.0020
          BoomOffset: [0 0.0050 0.0450]
           Conductor: [1x1 metal]
                Tilt: 0
            TiltAxis: [1 0 0]
                Load: [1x1 lumpedElement]


 show(quad_ant)

Figure contains an axes object. The axes object with title quadCustom antenna element, xlabel x (mm), ylabel y (mm) contains 9 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at the frequency 2.4 GHz.

pattern(quad_ant,2.4e9)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 9 objects of type patch, surface. Hidden axes object 2 contains 20 objects of type surface, line, text, patch.

References

[1] Bankey, Vinay, and N.Anvesh Kumar. "Design of a Yagi-Uda Antenna with Gain and Bandwidth Enhancement for Wi-Fi and Wi-Max Applications." International Journal of Antennas. Vol.2, Number 1, 2017

Version History

Introduced in R2019b

See Also

Objects

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