customAntennaMesh

Create 2-D custom mesh antenna on X-Y plane

Description

The customAntennaMesh object creates an antenna represented by a 2-D custom mesh on the X-Y plane. You can provide an arbitrary antenna mesh to the Antenna Toolbox™ and analyze this mesh as a custom antenna for port and field characteristics.

Creation

Description

customantenna = customAntennaMesh(points,triangles) creates a 2-D antenna represented by a custom mesh, based on the specified points and triangles.

Input Arguments

points — Points in custom mesh

2-by-N or 3-by-N integer matrix of Cartesian coordinates in meters

Points in a custom mesh, specified as a 2-by-N or 3-by-N integer matrix of Cartesian coordinates in meters. N is the number of points. In case you specify a 3xN integer matrix, the Z-coordinate must be zero or a constant value. This value sets the 'Points' property in the custom antenna mesh.

Example: [0 1 0 1;0 1 1 0]

Data Types: double

triangles — Triangles in mesh

4-by-M integer matrix

Triangles in the mesh, specified as a 4-by-M integer matrix. M is the number of triangles. The first three rows are indices to the points matrix and represent the vertices of each triangle. The fourth row is a domain number useful for identifying separate parts of an antenna. This value sets the 'Triangles' property in the custom antenna mesh.

Data Types: double

Properties

Points — Points in custom mesh

2-by-N or 3-by-N integer matrix of Cartesian coordinates

Points in a custom mesh, specified as a 2-by-N or 3-by-N integer matrix of Cartesian coordinates in meters. N is the number of points.

Example: [0.1 0.2 0]

Data Types: double

Triangles — Triangles in mesh

4-by-M integer matrix

Triangles in the mesh, specified as a 4-by-M integer matrix. M is the number of triangles.

Data Types: double

Conductor — Type of metal material

'PEC' (default) | metal object

Type of the metal used as a conductor, specified in the 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

Tilt — Tilt angle of antenna

0 (default) | scalar | vector

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 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

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector of Cartesian coordinates | two three-element vectors of Cartesian coordinates | 'X' | 'Y' | 'Z'

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: TiltAxis = 'Z'

Data Types: double

Object Functions

show	Display antenna, array structures or shapes
info	Display information about antenna or array
createFeed	Create feed location for custom antenna
axialRatio	Axial ratio of antenna
beamwidth	Beamwidth of antenna
charge	Charge distribution on antenna or array surface
current	Current distribution on antenna or array surface
EHfields	Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays
impedance	Input impedance of antenna; scan impedance of array
mesh	Mesh properties of metal, dielectric antenna, or array structure
meshconfig	Change mesh mode of antenna structure
pattern	Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array
patternAzimuth	Azimuth pattern of antenna or array
patternElevation	Elevation pattern of antenna or array
returnLoss	Return loss of antenna; scan return loss of array
sparameters	Calculate S-parameter for antenna and antenna array objects
vswr	Voltage standing wave ratio of antenna

Examples

Custom Mesh Antenna

Load a custom planar mesh. Create the antenna and antenna feed. View the custom planar mesh antenna and calculate the impedance at 100 MHz.

load planarmesh.mat;
c = customAntennaMesh(p,t);
show(c)

createFeed(c,[0.07,0.01],[0.05,0.05]);
Z = impedance(c,100e6)

Z = 0.5091 +57.2102i

References

[1] Balanis, C.A. Antenna Theory: Analysis and Design. 3rd Ed. New York: Wiley, 2005.

Version History

Introduced in R2015b