Create Koch curve fractal dipole or loop antenna on X-Y plane
fractalKoch object creates a Koch curve fractal dipole
or loop antenna on an X-Y plane. These fractals are used in multiband and wideband
applications like Global System for Mobile Communications (GSM), Universal Mobile
Telecommunication Service (UMTS), and Bluetooth.
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 an important requirement for small and complex circuits. Fractal antennas also have more input impedance or resistance due to increased length or perimeter, respectively.
All fractal antennas are printed structures that are etched on a dielectric substrate.
creates a Koch
curve fractal antenna on an X-Y plane. The default is a dipole with Koch
curve length chosen for an operating frequency of 0.86 GHz.
ant = fractalKoch
sets properties using one or more name-value pairs. For example,
ant = fractalKoch(Name,Value)
ant = fractalKoch('NumIterations',4) creates a Koch
curve fractal antenna with four iterations. Enclose each property name in
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
Length— Length of Koch curve along X-axis
0.0600(default) | positive scalar integer
Length of the Koch curve along the x-axis, specified as a positive scalar integer in meters.
ant.Length = 0.5000
Width— Width of Koch curve along Y-axis
1.0000e-03(default) | positive scalar integer
Width of the Koch curve along y-axis, specified as a positive scalar integer in meters.
ant.Width = 0.0050
Type— Type of Koch configuration
Type of Koch configuration, specified as
ant.Type = 'loop'
Load— Lumped elements
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, the load is at the origin. For more information, see
lumpedelement is the object handle for the load
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.
ant.Tilt = 90
'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]
ant.TiltAxis = 'Z'
wireStack antenna object only accepts the dot method to change its
|Display antenna or array structure; display shape as filled patch|
|Axial ratio of antenna|
|Beamwidth of antenna|
|Charge distribution on metal or dielectric antenna or array surface|
|Current distribution on metal or dielectric antenna or array surface|
|Design prototype antenna or arrays for resonance at specified frequency|
|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 or 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|
|Return loss of antenna; scan return loss of array|
|Voltage standing wave ratio of antenna|
Create and view a default Koch curve fractal antenna.
ant = fractalKoch
ant = fractalKoch with properties: NumIterations: 2 Length: 0.0600 Width: 1.0000e-03 Type: 'dipole' Tilt: 0 TiltAxis: [1 0 0] Load: [1x1 lumpedElement]
Create and view a Koch loop fractal antenna with three iterations.
ant = fractalKoch('NumIterations',3,'Type','loop'); show(ant)