horn ant workflow

8/12/2019 Horn Ant Workflow

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CST COMPUTER SIMULATION TECHNOLOGY | www.cst.com | Jan-13

Workflow Example

Horn Antenna

Purpose :Create a antennamodel and analyze its far

field properties.


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CST MWS - Standard Workflow

Choose a project template.

Set the frequency range.

Create your model.

parameters + geometry + materials

Define ports.

Specify boundary and symmetry

conditions.

Define monitors.

Check the mesh.

Run the simulation.


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1

0.5

0.25

zlength=2dia=2, rad=1

0.5

units: inch

waveguide: 1.0 in x 0.5 in x 0.5 in

aperture radius: 1.0 in, length:0.25 in

shell thickness: 0.01 in (outside)

monitors: E-field, H-field & far field at 10 GHz

Cylindrical Horn Antenna 8 12 GHz


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At the beginning choose to create a new project.

For an existing project you may choose

File -> New

File -> Select Template.

Project Template

The project templates customize the default

settings for particular types of applications.


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Project Template

The project templates customize the default settings for particular types ofapplications.

PEC is very practical for closed structures

(e.g. waveguides, connectors, filters).

Antennas should be modeled with vacuumas background material.

Solve->Background material


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Solve->Units

Solve->frequency

Define Units, Set Frequency Range


7/23CST COMPUTER SIMULATION TECHNOLOGY | www.cst.com | Jan-13

Objects->Basic shape->Brick Objects->Pick->Pick face

WCS->Align WCS

Horn Antenna Constructions (I)

Define a Brick (1 0.5 0.5 [in]) made of PEC.

Pick face.

Align the WCS with the face.


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Move the WCS by 2.0 inches.

Define a cylinder (outer radius: 1.0 in,

height: 0.25 in) made of PEC.

Horn Antenna Constructions (I)

WCS->Transform Local

Coordinate System

Object->Basic shape->Cylinder


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Pick two opposite faces.

Perform a loft.

Horn Antenna Constructions (II)

Object->Pick->Pick face


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Pick two faces.

Select multiple objects

(ctrl or shift + left mouse button).

Shell solid: 0.01 in

(outside).

Horn Antenna Constructions (III)

Object->Pick->Pick face

Object->Boolean->Add


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Objects->Pick->Pick point Solve-> waveguide port.

Define the port on the internal profile.

Port Definition

Objects->Pick

->Pick edge


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Boundary Conditions and Symmetry PlanesSolve->Boundary Conditions


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Add field monitors for E-field, H-field, and far field at 10 GHz.

3D Monitors


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TST at work!

Mesh View

Mesh-> Global mesh properties


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Transient Solver: Start Simulation

Simulation Termination Condition- Energy Lower Than Given Energy (Accuracy)

- Simulation Time Over Given Time Limit

(Simulation Time Limit)

Solve-> Time domain Solver


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Port Signals


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S-Parameter


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Smith Chart


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Energy


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Port information:

cut-off frequency

line impedance

propagation constant

Analyze 2D/3D Results


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Electric Field at 10 GHz


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Far Field at 10 GHz


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Polar Plot for Far Field at 10 GHz

Copy 1D results to create a folder for comparison.

phi=90 phi=0

horn ant workflow

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