EM/Circuit Co-Simulation Overview
Overview
Schematic View
Adding Circuit Elements
Setting up a Simulation Task
Viewing Results
Transient EM/Circuit Co-Simulation
See Also
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Schematic View
The integration of CST MICROWAVE STUDIO® in CST STUDIO SUITE™ allows for a straightforward coupling of EM simulation and circuit simulation.
For each CST MICROWAVE STUDIO® structure, two fundamentally different views on the model exist. The standard view is the 3D model reprentation which is visible by default. However, in addition, a schematic view can be activated by lecting the corresponding tab under the main view:
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Once this view is activated, the schematic view is shown where the 3D structure is reprented by a single block (MWS block) with terminals:
The terminals are a one-to-one correspondence to the 3D structure’s waveguide or discrete ports. The schematic view now allows for easy addition of external circuit elements to the terminals of the 3D structure.美术说课稿
Adding Circuit Elements
Adding circuit elements to the schematic view is straightforward. The general procedure is to lect a circuit element from the block lection tree and drag it onto the schematic view. The block lection tree is organized into veral categories containing elements.
Circuit elements can be accesd through the Circuit Elements folder:
The elements can now either be dragged by pressing the left mou button on the element itlf or even more easily by pressing the left mou button while the cursor is on
one of the element’s terminals. Note that an element’s terminal is highlighted by a red circle whenever the mou pointer is located over it.
Once an element is lected at its terminal and then dragged onto the schematic view, a red dot will appear whenever the terminal is located clo to the end of an already existing connection line (here shown for the RJ45 connector example):
Releasing the mou button there will then place and connect the circuit element on the schematic. Red terminal lines illustrate that this line is still open-ended whereas blue lines indicate proper connection.
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Selecting a circuit element by single-clicking on it will reveal its properties in the parameter window as shown below:
The element’s properties can be modified in the usual way by clicking into the corresponding entry field and changing the value.
Ground (GND) elements and ports can also be accesd by dragging and dropping them from the block lection tree (for ports lect the Circuit Elements⇨Sources / Ports ction), but convenient shortcuts exist for the frequently ud elements:
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Shortcut | Description |
g | Place a ground element. Simply click on the end of a connection line after activating this shortcut. |
p | Place a port element. Click on the end of a connection line to place the port |
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All elements can be dragged with the mou to a new location while the elements stay connected via the connection lines. Furthermore, after you lect an element, you can rotate it by choosing 莲子心有什么功效View⇨Tools⇨Rotate/Flip Tools⇨Rotate Left (shortcut l) and View⇨Toolsoppo手机怎么刷机⇨Rotate/Flip Tools⇨Rotate Right (shortcut r), respectively.
The following picture shows an exemplary external circuit where the original 8-port structure has been reduced to a 2-port device by applying loads to all the other terminals:
Setting up a Simulation Task
Once all terminals of the MWS block are connected to circuit elements, an S-parameter simulation of the structure including the external circuitry can be performed. The resulting S-matrix will have two ports in the example above, since only two external ports have been placed in the schematic (reprented by diamond-like symbols).
