sectorInvertedAmos

Create inverted Amos sector antenna

Description

Use the sectorInvertedAmos object to create an inverted Amos sector antenna consisting of four dipole-like arms. The antenna is fed at the origin of the dipole. The dipole arms are symmetric about the origin. The operating frequency of the antenna is at 2.45 GHz wireless.

Creation

Description

example

amossector = sectorInvertedAmos creates an inverted Amos sector antenna with four dipole-like arms.

amossector = sectorInvertedAmos(Name,Value) sets properties using one or more name-value pair. For example, amossector = sectorInvertedAmos('ArmWidth',0.2) creates an inverted Amos sector with a dipole width of 0.2 m. Enclose each property name in quotes.

Properties

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Length of individual dipole arms, specified as a vector with each element unit in meters.

Example: 'ArmLength',[0.0980 0.0810 0.0830 0.0750]

Example: amossector.ArmLength = [0.0980 0.0810 0.0830 0.0750]

Data Types: double

Width of dipole arms, specified as a scalar in meters.

Example: 'ArmWidth',0.0025

Example: amossector.ArmWidth = 0.0025

Data Types: double

Notch length, specified as a scalar in meters. For an inverted Amos sector antenna with seven stacked arms, six notches are generated. Notch length is measured along the length of the antennas.

Example: 'NotchLength',0.001

Example: amossector.NotchLength = 0.001

Data Types: double

Notch width, specified as a scalar in meters. For an inverted Amos sector antenna with seven stacked arms, six notches are generated. Notch width is measured perpendicular to the length of the antenna.

Example: 'NotchWidth',0.00190

Example: amossector.NotchWidth = 0.00190

Data Types: double

Ground plane length, specified as a scalar in meters. By default, ground plane length is measured along x-axis.

Example: 'GroundPlaneLength',0.7500

Example: amossector.GroundPlaneLength = 0.7500

Data Types: double

Ground plane width, specified as a scalar in meters. By default, ground plane width is measured along y-axis.

Example: 'GroundPlaneWidth',0.0500

Example: amossector.GroundPlaneWidth = 0.0500

Data Types: double

Distance between ground plane and antenna element, specified as a scalar in meters.

Example: 'Spacing',0.0355

Example: amossector.Spacing = 0.0355

Data Types: double

Lumped elements added to the antenna feed, specified as a lumped element object handle. You can add a load anywhere on the surface of the antenna. By default, it is at the origin. For more information, see lumpedElement.

Example: 'Load',lumpedelement. lumpedelement is the object handle for the load created using lumpedElement.

Example: amossector.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: 'Tilt',[90 90],'TiltAxis',[0 1 0;0 1 1] tilts the antenna at 90 degree about two axes, defined by vectors.

Data Types: double

Tilt axis of the antenna, specified as:

  • Three-element vectors of Cartesian coordinates in meters. In this case, each 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'

Object Functions

showDisplay antenna or array structure; Display shape as filled patch
axialRatioAxial ratio of antenna
beamwidthBeamwidth of antenna
chargeCharge distribution on metal or dielectric antenna or array surface
currentCurrent distribution on metal or dielectric antenna or array surface
designDesign prototype antenna or arrays for resonance at specified frequency
EHfieldsElectric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedanceInput impedance of antenna; scan impedance of array
meshMesh properties of metal or dielectric antenna or array structure
meshconfigChange mesh mode of antenna structure
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
returnLossReturn loss of antenna; scan return loss of array
sparametersS-parameter object
vswrVoltage standing wave ratio of antenna

Examples

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Create and view an inverted Amos sector antenna.

sectoria = sectorInvertedAmos
sectoria = 
  sectorInvertedAmos with properties:

            ArmLength: [0.0880 0.0710 0.0730 0.0650]
             ArmWidth: 0.0040
          NotchLength: 0.0238
           NotchWidth: 0.0170
    GroundPlaneLength: 0.6600
     GroundPlaneWidth: 0.0750
              Spacing: 0.0355
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

show(sectoria)

Plot Radiation Pattern at 2.4 GHz

pattern(sectoria,2.4e9)

Introduced in R2017b