Create single or multi-feed wire antenna
wireStack object converts eligible dipole and loop
antennas in the Antenna Catalog to wire antennas with single or multiple
feeds. You can now create cylindrical thin-wire antennas and analyze them using the
existing analysis functions.
For some antennas, the wire geometry may be altered to allow the placement of the
feed. Please use the
show function to view the
resulting antenna and verify its shape before running any analysis.
half-wavelength wire dipole antenna. The default wire dipole is center fed
with feed point at the origin, and is oriented along the
z-axis. The antenna length is chosen for an operating
frequency of 75 MHz.
ant = wireStack
ant — Wire antenna
wireStack object (default)
Wire antenna, returned as a
wireStack antenna object only accepts dot method to change its
Name — Name of wire antenna
"Dipole" (default) | string
Name of the wire antenna, specified as a string.
ant.Name = "monopole"
FeedLocation — Antenna feed locations
[0 0 0] (default) | N-by-3 array of Cartesian coordinates
This property is read-only.
Antenna feed locations, returned as an N-by-3 array of Cartesian coordinates in meters.
ant.FeedLocation = [0 2 4]
FeedVoltage — Magnitude of excitation voltage at each feed
1 (default) | 1-by-N array of doubles
Magnitude of excitation voltage in Volts at each feed, specified as a 1-by-N array of doubles.
ant.FeedVoltage = 2
FeedPhase — Phase shift applied to voltage at each feed
0 (default) | 1-by-M array of doubles
Phase shift applied to voltage at each feed in degrees, specified as a 1-by-M array of doubles.
ant.FeedVoltage = 60
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.
TiltAxis=[0 1 0;0 1 1]
tilts the antenna at 90 degrees about the two axes defined by the
TiltAxis — Tilt axis of antenna
[1 0 0] (default) | three-element vector | 2-by-3 matrix |
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.
"z"to describe a rotation about the x-, y-, or z-axis, respectively.
For more information, see Rotate Antennas and Arrays.
[0 1 0]
[0 0 0;0 1 0]
|Display antenna, array structures, shapes, or platform|
|Axial ratio of antenna|
|Beamwidth of antenna|
|Charge distribution on antenna or array surface|
|Current distribution on antenna or array surface|
|Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays|
|Input impedance of antenna or scan impedance of array|
|Mesh properties of metal, dielectric antenna, or array structure|
|Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry|
|Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array|
|Azimuth plane radiation pattern of antenna or array|
|Elevation plane radiation pattern of antenna or array|
|Return loss of antenna or scan return loss of array|
|Calculate S-parameters for antennas and antenna arrays|
|Voltage standing wave ratio (VSWR) of antenna or array element|
Default Wire Antenna
Create and view a default dipole wire antenna.
ant = wireStack
ant = wireStack with properties: Name: 'Dipole' FeedLocation: [0 0 0] FeedVoltage: 1 FeedPhase: 0 Tilt: 0 TiltAxis: [1 0 0]
Plot the radiation pattern of the antenna at the specified frequency.
Circular Loop Wire Antenna
Create and view a circular loop wire antenna.
ant = loopCircular(Radius=0.075, Thickness=0.0005); wireant = wireStack(ant)
wireant = wireStack with properties: Name: 'Circular loop' FeedLocation: [3.1745e-16 0.0747 0] FeedVoltage: 1 FeedPhase: 0 Tilt: 0 TiltAxis: [1 0 0]
Plot the directivity pattern of the antenna at 1 GHz.
Introduced in R2020a