Create discone antenna
discone object creates a discone antenna that consists
of a circular disc and a cone whose apex approaches the center of the disc. A small gap
exists between the disc and the cone through which the feed is connected.
A discone antenna is an omnidirectional vertically polarized antenna. This antenna has an exceptionally large coverage, offering a frequency range ratio of up to 10:1 between the upper cutoff frequency and the lower cutoff frequency. The discone antenna wideband coverage makes it useful in commercial, military, amateur radio, and radio scanner applications.
creates a discone
antenna with dimensions for a resonant frequency of 2.09 GHz. The default
discone has a feedpoint at the center of the disc.
ant = discone
ant— Discone antenna
Discone antenna, returned as a
Height— Vertical height of cone
0.0744(default) | real-valued scalar
Vertical height of the cone from the center of the lower base of the cone to the center of the upper base of the cone, specified as a real-valued scalar in meters.
ant.Height = 1
ConeRadii— Radii of cone
[5.3300e-04 0.0426](default) | vector
Radii of the cone consisting of the broad radius and the narrow radius, specified as a vector with each element unit in meters. The first element of the vector is the narrow radius, and the second element of the vector is the broad radius.
ant.ConeRadii = [6.3300e-04
DiscRadius— Radius of disc
0.0298(default) | real-valued scalar
Radius of the disc, specified as a real-valued scalar in meters.
ant.DiscRadius = 0.050
FeedHeight— Gap between cone and disc
3.1980e-04(default) | real-valued scalar
Gap between the cone and the disc, specified as a real-valued scalar in meters.
ant.FeedHeight = 0.0034
FeedWidth— Diameter of feed
4.2640e-04(default) | real-valued scalar
Diameter of the feed, specified as a real-valued scalar in meters.
ant.FeedWidth = 0.0050
Load— Lumped elements
lumpedElement] (default) | lumped element object handle
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 feed. 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|
|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 a default discone antenna.
ant = discone; show(ant)
Plot the radiation pattern of the antenna at 2.09 GHz.
Create and view a discone antenna with specific dimensions.
ant = discone('Height',0.0925,'ConeRadii',[0.666e-3 53.2e-3],... 'DiscRadius',37.25e-3,'FeedHeight',399.7e-6,'FeedWidth',0.553e-3); show(ant)
Calculate the impedance of the antenna over the frequency span of 500 MHz to 3 GHz and plot the S-parameters.
s = sparameters(ant,linspace(0.5e9,3e9,51)); figure; rfplot(s);
Plot the radiation pattern of the antenna at 1.7 GHz.
 Verma, Saritha, Abhilash Mehta, and Rukhsana Khan. "Analysis of Variation of Various Parameters on Design of Discone Antenna." Advanced Computational Techniques in Electromagnetics. Volume 2012, 2012, pp.1-5.