cassegrain
Description
The cassegrain
object creates a Cassegrain antenna. A
Cassegrain antenna is a parabolic antenna using a dual reflector system. In this
antenna, the feed antenna is mounted at or behind the surface of the main parabolic
reflector and aimed at the secondary reflector. For more information see, Architecture of Cassegrain Antenna.
Cassegrain antennas are used in applications such as satellite ground-based systems.
Creation
Description
creates a
conical horn fed Cassegrain antenna with a resonating frequency of 18.51
GHz. This antenna gives maximum gain when operated at 18 GHz.ant
= cassegrain
creates a Cassegrain antenna, with additional Properties
specified by one or more name–value arguments. ant
= cassegrain(Name=Value)Name
is
the property name and Value
is the corresponding value.
You can specify several name-value arguments in any order as
Name1
= Value1
,
...
,
NameN
=ValueN
. Properties not
specified retain their default values.
For example, ant = cassegrain(Radius=[0.4 0.22])
creates a Cassegrain antenna with the main reflector with radius 0.4 m and
the secondary reflector with radius 0.22 m.
Properties
Object Functions
axialRatio | Calculate and/or plot axial ratio of antenna or array |
bandwidth | Calculate and/or plot absolute bandwidth of antenna |
beamwidth | Beamwidth of antenna |
charge | Charge distribution on antenna or array surface |
current | Current distribution on antenna or array surface |
design | Design prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects |
efficiency | Radiation efficiency of antenna |
EHfields | Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays |
impedance | Input impedance of antenna or scan impedance of array |
info | Display information about antenna, array, or platform |
memoryEstimate | Estimate memory required to solve antenna or array mesh |
mesh | Mesh properties of metal, dielectric antenna, or array structure |
meshconfig | Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry |
optimize | Optimize antenna or array using SADEA optimizer |
pattern | Plot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array |
patternAzimuth | Azimuth plane radiation pattern of antenna or array |
patternElevation | Elevation plane radiation pattern of antenna or array |
rcs | Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array |
resonantFrequency | Calculate and/or plot resonant frequency of antenna |
returnLoss | Return loss of antenna or scan return loss of array |
show | Display antenna, array structures, shapes, or platform |
solver | Access FMM solver for electromagnetic analysis |
sparameters | Calculate S-parameters for antennas and antenna arrays |
vswr | Voltage standing wave ratio (VSWR) of antenna or array element |
Examples
More About
References
[1] Dandu, Obulesu. "Optimized Design of Axillary Symmetric Cassegrain Reflector Antenna Using Iterative Local Search Algorithm"
[2] Balanis, C.A. Antenna Theory: Analysis and Design. 3rd Ed. New York: Wiley, 2005.
Version History
Introduced in R2019b