Create inverted-L antenna over rectangular ground plane
invertedL object is an inverted-L antenna mounted over
a rectangular ground plane.
The width of the metal strip is related to the diameter of an equivalent cylinder by the equation
d = diameter of equivalent cylinder
a = radius of equivalent cylinder
For a given cylinder radius, use the
cylinder2strip utility function to calculate the equivalent width. The
default inverted-L antenna is center-fed. The feed point coincides with the origin. The
origin is located on the xy- plane.
inverted-L antenna mounted over a rectangular ground plane. By default, the
dimensions are chosen for an operating frequency of 1.7 GHz.
l = invertedL
an inverted-L antenna, with additional properties specified by one or more
name-value pair arguments.
l = invertedL(Name,Value)
Name is the property name and
Value is the corresponding value. You can specify
several name-value pair arguments in any order as
ValueN. Properties not
specified retain their default values.
Height— Height of inverted element along z-axis
Height of inverted element along z-axis, specified a scalar in meters.
Width— Strip width
Strip width, specified as a scalar in meters.
Strip width should be less than
Length— Stub length along x-axis
Stub length along x-axis, specified as a scalar in meters.
GroundPlaneLength— Ground plane length along x-axis
Ground plane length along x-axis, specified a scalar in
Inf, uses the infinite ground plane technique for
GroundPlaneWidth— Ground plane width along y-axis
Ground plane width along y-axis, specified as a scalar
in meters. Setting
Inf, uses the infinite ground plane technique for
FeedOffset— Signed distance from center along length and width of ground plane
[0 0](default) | two-element vector
Signed distance from center along length and width of ground plane, specified as a two-element vector.
Conductor— Type of metal material
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
Lumped elements added to the antenna feed, specified as a lumped element
object. 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.
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|
|Display information about antenna or array|
|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 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 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|
|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|
Create and view an inverted-L antenna that has 30mm length over a ground plane of dimensions 200mmx200mm.
il = invertedL('Length',30e-3, 'GroundPlaneLength',200e-3,... 'GroundPlaneWidth',200e-3); show(il)
Plot the radiation pattern of an inverted-L at a frequency of 1.7 GHz.
iL = invertedL('Length',30e-3, 'GroundPlaneLength',200e-3,... 'GroundPlaneWidth',200e-3); pattern(iL,1.7e9)
 Balanis, C.A. Antenna Theory. Analysis and Design, 3rd Ed. New York: Wiley, 2005.
 Volakis, John. Antenna Engineering Handbook, 4th Ed. New York: Mcgraw-Hill, 2007.