Create inverted-F antenna over rectangular ground plane
invertedF object is an inverted-F 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 is the diameter of equivalent cylinder
r is the radius of equivalent cylinder
For a given cylinder radius, use the utility function
cylinder2strip to calculate the equivalent width. The default inverted-F
antenna is center-fed. The feed point coincides with the origin. The origin is located
on the xy- plane.
inverted-F antenna mounted over a rectangular ground plane. By default, the
dimensions are chosen for an operating frequency of 1.7 GHz.
f = invertedF
an inverted-F antenna, with additional Properties specified by one or more name-value
f = invertedF(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
Properties that you do not specify retain their default values.
Height — Vertical element height along z-axis
0.0140 (default) | scalar
Vertical element height along z-axis, specified a scalar in meters.
Width — Strip width
0.0020 (default) | scalar
Strip width, specified as a scalar in meters. Strip width must be less
'Height'/4 and greater than
LengthToOpenEnd — Stub length from feed to open end
0.0310 (default) | scalar
Stub length from feed to open end, specified as a scalar in meters.
LengthToShortEnd — Stub length from feed to shorting end
0.0060 (default) | scalar
Stub length from feed to shorting end, specified as a scalar in meters.
GroundPlaneLength — Ground plane length along x-axis
0.1000 (default) | scalar
Ground plane length along x-axis, specified as a scalar in meters.
Infinite ground plane length is currently unsupported.
GroundPlaneWidth — Ground plane width along y-axis
0.1000 (default) | scalar
Ground plane width along y-axis, specified as a scalar in meters.
Infinite ground plane width is currently unsupported.
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
"PEC" (default) |
Load — Lumped elements
[1x1 lumpedElement] (default) |
Lumped elements added to the antenna feed, specified as a
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|
|Display information about antenna or array|
|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 or create AI-based antenna from antenna catalog objects|
|Radiation efficiency of antenna|
|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|
|Optimize antenna or array using SADEA optimizer|
|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|
|Calculate and plot radar cross section (RCS) of platform, 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|
Create and View Inverted-F Antenna
Create and view an inverted-F antenna with 14 mm height over a ground plane of dimensions 200 mm-by-200 mm.
f = invertedF(Height=14e-3, GroundPlaneLength=200e-3,... GroundPlaneWidth=200e-3); show(f)
Plot Radiation Pattern of Inverted-F
This example shows you how to plot the radiation pattern of an inverted-F antenna for a frequency of 1.3 GHz.
f = invertedF(Height=14e-3, GroundPlaneLength=200e-3,... GroundPlaneWidth=200e-3); pattern(f,1.39e9)
 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.
Introduced in R2015a