Create circular waveguide
waveguideCircular object creates a circular waveguide.
A circular waveguide is a hollow tube of uniform cross section, that confines the
electromagnetic wave. This antenna is used in radar and short and medium distance
a circular waveguide with dimensions for an operating frequency of 8.42
ant = waveguideCircular
ant— Circular waveguide
Circular waveguide, returned as a
Height— Height of circular waveguide
0.0300(default) | real-valued scalar
Height of the circular waveguide, specified as a real-valued scalar in meters.
ant.Height = 0.0215
Radius— Radius of circular waveguide
0.0120(default) | real-valued scalar
Radius of the circular waveguide, specified as a real-valued scalar in meters.
ant.Radius = 0.0546
FeedHeight— Height of feed
0.0075(default) | real-valued scalar
Height of the feed, which is equal to the height of the monopole, specified as a real-valued scalar in meters.
ant.FeedHeight = 0.0034
FeedWidth— Width of feed
0.0040(default) | real-valued scalar
Width of the feed, which is equal to the width of the monopole, specified as a real-valued scalar in meters.
ant.FeedWidth = 0.0050
FeedOffset— Vertical distance of feed along Y-axis
0.0100(default) | real-valued scalar
Vertical distance of the feed along the Y-axis, specified as a real-valued scalar in meters.
ant.FeedOffset = 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 circular waveguide.
ant = waveguideCircular
ant = waveguideCircular with properties: Radius: 0.0120 Height: 0.0300 FeedHeight: 0.0075 FeedWidth: 0.0040 FeedOffset: 0.0100 Tilt: 0 TiltAxis: [1 0 0] Load: [1x1 lumpedElement]
Plot the radiation pattern of the antenna at 7.42 GHz.
Create a circular waveguide with the following dimensions.
ant=waveguideCircular('Radius',35.7e-3,'Height',200e-3,... 'Feedwidth',26e-3,'FeedHeight',34.71e-3,'FeedOffset', 42.42e-3); show(ant);
Plot the s-parameters and impedance of the waveguide.
 Jadhav, Rohini.P, Vinithkurnar Javnrakash Dongre, Arunkumar Heddallikar. "Design of X-Band Conical Horn Antenna Using Coaxial Feed and Improved Design Technique for Bandwidth Enhancement." In International Conference on Computing, Communication, Control, and Automation (ICCUBEA), 1-6. Pune, India: ICCUBEA 2017