sectorInvertedAmos

Create inverted Amos sector antenna

Description

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

Creation

Syntax

amossector = sectorInvertedAmos

amossector = sectorInvertedAmos(Name=Value)

Description

amossector = sectorInvertedAmos creates an inverted Amos sector antenna with four dipole-like arms with default property values. The default dimensions are chosen for an operating frequency of around 2.45 GHz.

amossector = sectorInvertedAmos(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, amossector = sectorInvertedAmos(ArmWidth=0.2) creates an inverted Amos sector with a dipole width of 0.2 m.

Properties

ArmLength — Individual dipole arm length

[0.0880 0.0710 0.0730 0.0650] (default) | vector

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

Example: [0.0980 0.0810 0.0830 0.0750]

Data Types: double

ArmWidth — Dipole arm width

0.0040 (default) | scalar

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

Example: 0.0025

Data Types: double

NotchLength — Notch length

0.0238 (default) | scalar

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: 0.001

Data Types: double

NotchWidth — Notch width

0.0170 (default) | scalar

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: 0.00190

Data Types: double

GroundPlaneLength — Ground plane length

0.6600 (default) | scalar

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

Example: 0.7500

Data Types: double

GroundPlaneWidth — Ground plane width

0.0750 (default) | scalar

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

Example: 0.0500

Data Types: double

Spacing — Distance between ground plane and antenna element

0.0355 (default) | scalar

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

Example: 0.0355

Data Types: double

Conductor — Type of metal material

'PEC' (default) | metal object

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

Load — Lumped elements

[1x1 lumpedElement] (default) | lumped element object

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, it is at the origin. For more information, see lumpedElement.

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

Example: amossector.Load = lumpedElement('Impedance',75)

Tilt — Tilt angle of antenna

0 (default) | scalar | vector

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

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector | 2-by-3 matrix | "X" | "Y" | "Z"

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

axialRatio	Calculate and plot axial ratio of antenna or array
bandwidth	Calculate and plot absolute bandwidth of antenna or array
beamwidth	Beamwidth of antenna
charge	Charge distribution on antenna or array surface
current	Current distribution on antenna or array surface
design	Design prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects
efficiency	Calculate and plot radiation efficiency of antenna or array
EHfields	Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrent	Calculate current at feed for antenna or array
impedance	Calculate and plot input impedance of antenna or scan impedance of array
info	Display information about antenna, array, or platform
memoryEstimate	Estimate memory required to solve antenna or array mesh
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwrite	Write antenna or array analysis data to MSI planet file
optimize	Optimize antenna or array using SADEA optimizer
pattern	Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array
patternAzimuth	Azimuth plane radiation pattern of antenna or array
patternElevation	Elevation plane radiation pattern of antenna or array
peakRadiation	Calculate and mark maximum radiation points of antenna or array on radiation pattern
rcs	Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequency	Calculate and plot resonant frequency of antenna
returnLoss	Calculate and plot return loss of antenna or scan return loss of array
show	Display antenna, array structures, shapes, or platform
sparameters	Calculate S-parameters for antenna or array
stlwrite	Write mesh information to STL file
vswr	Calculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

Inverted Amos Sector

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
            Conductor: [1x1 metal]
                 Tilt: 0
             TiltAxis: [1 0 0]
                 Load: [1x1 lumpedElement]

show(sectoria)

Plot Radiation Pattern at 2.4 GHz

pattern(sectoria,2.4e9)

Version History

Introduced in R2017b