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Excitation Source Overview
CST MICROWAVE STUDIO offers several different excitation sources, depending
on the specific application and structure types. In the following a short
overview list is given, please refer to the respective overview pages
to learn more about the corresponding excitation source type.
Ports
Usually used for S-Parameter calculations
The S-matrix describes the transmission of electromagnetic field energy
between different ports of a structure. These ports, especially their
name and location, need to be defined in CST MICROWAVE STUDIO. Two different
kinds of ports exist: Waveguide
Ports and Discrete
Ports. You must
first decide which port to use at a particular location. The type of the
ports may vary within a structure, of course.
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- Discrete Ports
(lumped elements) |
Discrete ports are available
as S-Parameter, voltage or current port. They are mainly used to simulate
lumped element sources inside the calculation domain and can be
used for TEM-like modes.
Input:
Knowledge of TEM-mode, line impedance (voltage or current respectively)
Output:
Voltage or current
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Waveguide
Ports
- Multipin Ports
(2D eigenmode solver) |
Waveguide ports are used
to simulate an infinitely long waveguide, e.g. a rectangular waveguide,
a coaxial cable or a microstrip line. They deliver a better match to the
mode pattern as well as higher accuracy in S-Parameters.
Input:
Area for eigenmode solution
Output:
E and H-pattern, line and wave impedance, propagation constant (beta,
alpha) |
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Field Sources
Imprint of field distributions
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- Plane Waves |
Excitation of linear, circular
or elliptical plane waves.
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- Farfield Sources |
Import of a farfield monitor
file calculated with CST MICROWAVE STUDIO |
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- Nearfield Sources
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Import of near field source
data calculated by CST MICROWAVE STUDIO, CST CABLE STUDIO, or CST PCB
STUDIO. Also available is the import of Sigrity庐 NFD radiation data. |
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