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monopoleRadial

Create monopole antenna mounted on radial ground plane

Description

The monopoleRadial antenna object creates a monopole antenna mounted on a radial ground plane. 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

Description

example

mpr = monopoleRadial creates a 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 X-Y plane. The default antenna object resonates at 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.

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, 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.

Note

The wireStack antenna object only accepts the dot method to change its properties.

Data Types: double

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'

Note

The wireStack antenna object only accepts the dot method to change its properties.

Data Types: double

Object Functions

showDisplay antenna or array structure; display shape as filled patch
impedanceInput impedance of antenna; scan impedance of array
sparametersS-parameter object
returnLossReturn loss of antenna; scan return loss of array
vswrVoltage standing wave ratio of antenna
optimizeOptimize antenna or array using SADEA optimizer
patternRadiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuthAzimuth pattern of antenna or array
patternElevationElevation pattern of antenna or array
axialRatioAxial ratio of antenna
beamwidthBeamwidth of antenna
currentCurrent distribution on metal or dielectric antenna or array surface
chargeCharge distribution on metal or dielectric antenna or array surface
efficiencyRadiation efficiency of antenna
EHfieldsElectric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
meshMesh properties of metal or dielectric antenna or array structure
designDesign prototype antenna or arrays for resonance at specified frequency
rcsCalculate and plot radar cross section (RCS) of platform, antenna, or array

Examples

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Create and view a monopole antenna mounted on radial ground plane with default properites.

ant = monopoleRadial;
show(ant)

Figure contains an axes. The axes with title monopoleRadial antenna element contains 5 objects of type patch, surface. These objects represent PEC, feed.

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. The axes with title monopoleRadial antenna element 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 an axes and other objects of type uicontrol. The axes contains 5 objects of type patch, surface.

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.

Introduced in R2020b