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monopoleRadial

Create monopole antenna mounted on radial ground plane

Since R2020b

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Description

The default monopoleRadial object creates a monopole antenna mounted on a radial ground plane resonating around 75 MHz. The monopole radial antenna is a variant of the monopole antenna, where the antenna is mounted on radials as versus a rectangular ground plane. These antennas are commonly used in airborne and ground-based radio communications.

Radial monopole antenna geometry, default radiation pattern, and impedance plot.

Creation

Syntax

mpr = monopoleRadial
mpr = monopoleRadial(Name,Value)

Description

mpr = monopoleRadial creates a default quarter wavelength monopole antenna with a radial ground plane. The default antenna object is center-fed with the feed point located at the origin on the xy-plane. The default dimensions are chosen for an operating frequency of around 75 MHz.

example

mpr = monopoleRadial(Name,Value) sets Properties using name-value pairs. For example, monopoleRadial('Height',2.2) creates a monopole antenna mounted on a radial ground plane with height of 2.2 meters. You can specify multiple name-value pairs. Enclose each property name in quotes. Properties not specified retain their default values.

example

Properties

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Monopole height, specified as a positive scalar in meter.

Example: 'Height',3

Data Types: double

Monopole width, specified as a positive scalar in meters.

Note

Monopole width should be less than 'Height'/4 and greater than 'Height'/1001. For more information, see [2].

Example: 'Width',0.05

Data Types: double

Number of radials, specified as a positive scalar.

Example: 'NumRadials',14

Data Types: double

Width of each radial in the monopole radial antenna, specified as a positive scalar in meters.

Example: 'RadialWidth',0.05

Data Types: double

Length of each radial in the monopole radial antenna, specified as a positive scalar in meters.

Example: 'RadialLength',3.13

Data Types: double

Tilt angle of radials with respect to the ground plane, specified as a scalar in degree. Radials are tilted along the X-Y plane in negative Z direction.

Example: 'RadialTilt',10

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 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, where lumpedelement is the load added to the antenna feed.

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
currentCurrent distribution on antenna or array surface
chargeCharge 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 monopole antenna mounted on radial ground plane with default properites.

ant = monopoleRadial;
show(ant)

Figure contains an axes object. The axes object with title monopoleRadial antenna element, xlabel x (m), ylabel y (m) contains 5 objects of type patch, surface. These objects represent PEC, feed.

Open Live Script

Create and view a monopole antenna on a radial ground plane with the width of 0.0067 meters and the height of 0.33331 meters.

m = monopoleRadial(Width=0.0067,Height=0.3331);
show(m)

Figure contains an axes object. The axes object with title monopoleRadial antenna element, xlabel x (m), ylabel y (m) contains 5 objects of type patch, surface. These objects represent PEC, feed.

Plot the radiation pattern of the antenna at a frequency of 225 MHz.

pattern(m,225e6)

Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 5 objects of type patch, surface. Hidden axes object 2 contains 17 objects of type surface, line, text, patch.

References

[1] Balanis, Constantine A. Antenna Theory: Analysis and Design. 3rd ed. Hoboken, NJ: John Wiley, 2005.

[2] Volakis, John. Antenna Engineering Handbook, 4th Ed. New York: Mcgraw-Hill, 2007.

Version History

Introduced in R2020b

See Also

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