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 X-Y 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 pair arguments.
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
ValueN. Properties not specified retain their default
Height— Vertical element height along z-axis
Vertical element height 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
LengthToOpenEnd— Stub length from feed to open end
Stub length from feed to open end, specified as a scalar in meters.
LengthToShortEnd— Stub length from feed to shorting end
Stub length from feed to shorting end, specified as a scalar in meters.
GroundPlaneLength— Ground plane length along x-axis
Ground plane length along x-axis, specified as a scalar in meters. Setting
'GroundPlaneLength' to Inf, uses the infinite ground
plane technique for antenna analysis.
GroundPlaneWidth— Ground plane width along y-axis
Ground plane width along y-axis, specified as a scalar in meters. Setting
'GroundPlaneWidth' to Inf, uses the infinite ground
plane technique for antenna analysis.
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.
Load— Lumped elements
Lumped elements added to the antenna feed, specified as a lumped element
object handle. 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.
'TiltAxis',[0 1 0;0 1 1]
tilts the antenna at 90 degree about two axes, defined by vectors.
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 vectors of Cartesian coordinates in meters. In this case, each 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'
|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 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|
|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 an inverted-F antenna with 14mm height over a ground plane of dimensions 200mmx200mm.
f = invertedF('Height',14e-3, 'GroundPlaneLength',200e-3, ... 'GroundPlaneWidth',200e-3); show(f)
This example shows you how to plot the radiation pattern of an inverted-F antenna for a frequency of 1.3GHz.
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.