Create Sierpinski's Gasket fractal antenna on xy- plane
fractalGasket object creates an equilateral
triangle-shaped Sierpinski's Gasket fractal antenna. These fractals are used in building
communications systems, wireless networks, universal tactic communications systems,
mobile devices, telematics, and radio frequency identification (RFID)
A fractal antenna uses a self-similar design to maximize the length or increase the perimeter of a material that transmits or receives electromagnetic radiation within a given volume or area. The main advantage of fractal antennas is that they are compact, which is important requirement for small and complex circuits. Fractal antennas also have more input impedance or resistance due to increased length or perimeter.
All fractal antennas are printed structures that are etched on a dielectric substrate.
equilateral triangle-shaped Sierpinski’s gasket fractal antenna. The default
planar fractal antenna is in the shape of a bowtie which is center-fed. The
antenna resonates at a frequency of 1.3 GHz.
ant = fractalGasket
sets properties using one or more name-value pairs. For example,
ant = fractalGasket(Name,Value)
ant = fractalGasket('NumIterations',4) creates a
Sierpinski's Gasket with four iterations.
NumIterations — Number of iterations of fractal antenna
2 (default) | scalar integer
Number of iterations of the fractal antenna, specified as a scalar integer.
ant.NumIterations = 2
Side — Lengths for three sides of triangle
0.2000 (default) | scalar | two-element vector | three-element vector
Lengths for three sides of the triangle, specified as a scalar in meters or a two- or three-element vector in meters.
Scalar – The triangle is equilateral.
Two-element vector – The first value specifies the base of the triangle along the x-axis. The second value specifies the other two sides of the triangle. The triangle is isosceles.
Three-element vector – The first value specifies the base of the triangle along the x-axis. The remaining two values specify the other two sides of the triangle. The triangle is scalene.
ant.Side = [0.5000,1.000]
NeckWidth — Width at neck of fractal antenna
0.0020 (default) | positive scalar integer
Width at the neck of the fractal antenna where the feed is located, specified as a positive scalar integer in meters.
ant.NeckWidth = 0.0050
Conductor — Type of metal material
'PEC' (default) |
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
metal. For more information on metal conductor meshing, see
m = metal('Copper');
m = metal('Copper'); ant.Conductor =
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, the load is at the origin. For more information, see
lumpedelement is the object for the load created
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.
TiltAxis=[0 1 0;0 1 1]
tilts the antenna at 90 degrees about the two axes defined by the
wireStack antenna object
only accepts the dot method to change its properties.
TiltAxis — Tilt axis of antenna
[1 0 0] (default) | three-element vector of Cartesian coordinates | two three-element vectors of Cartesian coordinates |
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.
TiltAxis=[0 1 0]
TiltAxis=[0 0 0;0 1 0]
TiltAxis = 'Z'
wireStack antenna object only accepts the dot method to change its
|Display antenna, array structures or shapes|
|Axial ratio of antenna|
|Beamwidth of antenna|
|Charge distribution on antenna or array surface|
|Current distribution on antenna or array surface|
|Design prototype antenna or arrays for resonance around specified frequency|
|Radiation efficiency of antenna|
|Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays|
|Input impedance of antenna; scan impedance of array|
|Mesh properties of metal, dielectric antenna, or array structure|
|Change mesh mode of antenna structure|
|Optimize antenna or array using SADEA optimizer|
|Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array|
|Azimuth pattern of antenna or array|
|Elevation pattern of antenna or array|
|Calculate and plot radar cross section (RCS) of platform, antenna, or array|
|Return loss of antenna; scan return loss of array|
|Calculate S-parameter for antenna and antenna array objects|
|Voltage standing wave ratio of antenna|
Default Sierpinski's Gasket
Create and view a default fractal Sierpinski's Gasket.
ant = fractalGasket
ant = fractalGasket with properties: NumIterations: 2 Side: 0.2000 NeckWidth: 0.0020 Conductor: [1x1 metal] Tilt: 0 TiltAxis: [1 0 0] Load: [1x1 lumpedElement]
Introduced in R2018b