hornScrimp

Create Scrimp horn antenna

Since R2021a

Description

The default hornScrimp object creates a Scrimp horn antenna resonating around 3.91 GHz. Scrimp (short circular ring loaded horn with minimized cross-polarization) horn antenna is a short, axially corrugated horn antenna with a single slot. Using this antenna provides high aperture efficiency, low cross-polarization, and low voltage standing wave ratio (VSWR) over a broad frequency band. These antennas are used for navigation satellite feeder links in a medium earth orbit (MEO).

Creation

Syntax

ant = hornScrimp

ant = hornScrimp(PropertyName=Value)

Description

ant = hornScrimp creates Scrimp horn antenna with default property values. The default dimensions are chosen for an operating frequency of around 3.91 GHz.

ant = hornScrimp(PropertyName=Value) sets properties using one or more name–value arguments. PropertyName is the property name and Value is the corresponding value. You can specify several name-value arguments in any order as PropertyName1=Value1,...,PropertyNameN=ValueN. Properties that you do not specify, retain their default values.

For example, hornScrimp(ConeHeight=0.05) creates Scrimp horn antenna with a cone height of 0.05 meters.

Properties

Radius — Radius of circular waveguide

0.02920 (default) | positive scalar

Radius of the circular waveguide, specified as a positive scalar in meters.

Example: 0.0760

Data Types: double

WaveguideHeight — Height of circular waveguide

0.0250 (default) | positive scalar

Height of the circular waveguide, specified as a positive scalar in meters.

Example: 0.0340

Data Types: double

FeedHeight — Height of feed

0.0175 (default) | positive scalar

Height of the feed, specified as a positive scalar in meters.

Example: 0.0085

Data Types: double

FeedWidth — Width of feed

0.0003 (default) | positive scalar

Width of the feed, specified as a positive scalar in meters.

Example: 0.0200

Data Types: double

FeedOffset — Signed distance along waveguide height

0.0200 (default) | real-valued scalar

Signed distance along the waveguide height, specified as a real-valued scalar in meters.

Example: 0.03627

Data Types: double

ConeHeight — Height of cone

0.0362 (default) | positive scalar

Height of the cone, specified as a positive scalar in meters.

Example: 0.0540

Data Types: double

ConeRadius — Radius of cone

0.0408 (default) | positive scalar

Radius of the cone, specified as a positive scalar in meters.

Example: 0.0540

Data Types: double

ApertureRadius — Radius of cone aperture

0.0480 (default) | positive scalar

Radius of the cone aperture, specified as a positive scalar in meters.

Example: 0.0760

Data Types: double

ApertureHeight — Height of cone aperture

0.0250 (default) | positive scalar

Height of the cone aperture, specified as a positive scalar in meters.

Example: 0.0760

Data Types: double

StubHeight — Height of stub

0.0146 (default) | positive scalar

Height of the stub, specified as a positive scalar in meters.

Example: 0.0760

Data Types: double

Conductor — Type of metal

metal("PEC") (default) | metal object

Type of the metal used as a conductor, specified as a metal object. You can choose any metal from the MetalCatalog or specify a metal of your choice. For more information on metal conductor meshing, see Meshing.

Example: metal("Copper")

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.

Example: 90

Example: Tilt=[90 90],TiltAxis=[0 1 0;0 1 1] tilts the antenna at 90 degrees about the two axes defined by the vectors.

Data Types: double

TiltAxis — Tilt axis of antenna

[1 0 0] (default) | three-element vector | 2-by-3 matrix | "X" | "Y" | "Z"

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.

• "x", "y", or "z" to describe a rotation about the x-, y-, or z-axis, respectively.

For more information, see Rotate Antennas and Arrays.

Example: [0 1 0]

Example: [0 0 0;0 1 0]

Example: "Z"

Data Types: double | string

Load — Lumped elements

[1x1 lumpedElement] (default) | lumpedElement object

Lumped elements added to the antenna feed, specified as a lumpedElement object. You can add a load anywhere on the surface of the antenna. By default, the load is at the feed.

Example: lumpedElement(Impedance=75)

Object Functions

axialRatio	Calculate and plot axial ratio of antenna or array
bandwidth	Calculate and plot absolute bandwidth of antenna or array
beamwidth	Beamwidth of antenna
charge	Charge distribution on antenna or array surface
current	Current distribution on antenna or array surface
design	Create antenna, array, or AI-based antenna resonating at specified frequency
efficiency	Calculate and plot radiation efficiency of antenna or array
EHfields	Electric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
feedCurrent	Calculate current at feed for antenna or array
impedance	Calculate and plot 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	Generate and view mesh for antennas, arrays, and custom shapes
meshconfig	Change meshing mode of antenna, array, custom antenna, custom array, or custom geometry
msiwrite	Write antenna or array analysis data to MSI planet file
optimize	Optimize antenna and array catalog elements using SADEA or TR-SADEA algorithm
pattern	Plot radiation pattern of antenna, array, or embedded element of array
patternAzimuth	Azimuth plane radiation pattern of antenna or array
patternElevation	Elevation plane radiation pattern of antenna or array
peakRadiation	Calculate and mark maximum radiation points of antenna or array on radiation pattern
rcs	Calculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
resonantFrequency	Calculate and plot resonant frequency of antenna
returnLoss	Calculate and plot return loss of antenna or scan return loss of array
show	Display antenna, array structures, shapes, or platform
sparameters	Calculate S-parameters for antenna or array
stlwrite	Write mesh information to STL file
vswr	Calculate and plot voltage standing wave ratio (VSWR) of antenna or array element

Examples

Create Default Scrimp Horn Antenna and Plot Radiation Pattern

Create Scrimp horn antenna with default properties.

ant = hornScrimp

ant = 
  hornScrimp with properties:

             Radius: 0.0292
    WaveguideHeight: 0.0250
         FeedHeight: 0.0175
          FeedWidth: 3.0000e-04
         FeedOffset: 0.0200
         ConeHeight: 0.0362
         ConeRadius: 0.0408
     ApertureRadius: 0.0480
     ApertureHeight: 0.0250
         StubHeight: 0.0146
          Conductor: [1×1 metal]
               Tilt: 0
           TiltAxis: [1 0 0]
               Load: [1×1 lumpedElement]

View the antenna using the show function.

show(ant)

Plot the radiation pattern of the Scrimp horn antenna at a frequency of 4 GHz.

pattern(ant,4e9)

Plot S-Parameter of Scrimp Horn Antenna

Create Scrimp horn antenna with the aperture radius of 0.06 meters.

ant = hornScrimp;
ant.ApertureRadius = 0.06;

Visualize the antenna using the show function.

show(ant)

Plot the S-parameters over a frequency range of 3.6 GHz to 4.5 GHz.

s = sparameters(ant,linspace(3.6e9,4.5e9,51));
rfplot(s)

More About

Parametric Analysis Guidelines

To understand how the properties of the hornScrimp antenna object influence the antenna design, use these parametric analysis guidelines.

• To increase the operating frequency, decrease the FeedHeight of the hornScrimp antenna.

• To increase the gain, increase the ApertureRadius, ApertureHeight, and StubHeight of the hornScrimp antenna object.

References

[1] Muhammad, S. A., A. Rolland, S. H. Dahlan, R. Sauleau, and H. Legay. “Hexagonal-Shaped Broadband Compact Scrimp Horn Antenna for Operation in C-Band.” IEEE Antennas and Wireless Propagation Letters 11 (2012): 842–45.

[2] Muhammad, S., A. Rolland, S. H. Dahlan, R. Sauleau and H. Legay. “Comparison Between Scrimp Horns and Stacked Fabry-Perot Cavity Antennas with Small Apertures.” 2012 6th European Conference on Antennas and Propagation (EUCAP) (2012): 817–820.

Version History

Introduced in R2021a