Maxwell SV Getting Started: A 2D Electrostatic Problem - LES

Getting Started: A 2D Electrostatic Problem
Displaying Zoomed Models
You can also use the scroll bars on the right side and bottom of the subwindow to change your view.
Scroll bars appear only when the entire geometric model is not displayed in the window.
To change your view, do one of the following:
• Click the arrow buttons at the top and bottom of the scroll bar.
• To scroll through the model:
1. Move the cursor to the off-colored bar, or “thumb scroll,” visible on the scroll bar.
2. Drag the thumb scroll up, down, left, or right in the scroll bar to the portion of the model
that you want to display.
For instance, to pan down a geometric model, drag the thumb scroll in the vertical scroll bar down.
If the portion of the geometry in which you are interested does not appear, continue to manipulate
the thumb scrolls until it does.
Draw a Rectangle
The Object>Rectangle command is generally used to create rectangular objects, such as the
ground plane, while the Object>Polyline command is used to create lines and other simple closed
shapes. However, to illustrate its use, Object>Polyline is used in this section to create a rectangle.
To create the ground plane:
1. Click Object>Polyline. To create a rectangle using this command, you will select four points
representing the four corners of the rectangle.
2. Select the lower-left corner of the substrate (–20, –4) as the first point of the rectangle.
3. Select the lower-right corner of the substrate (20, –4) as the second point in the rectangle. The
2D Modeler draws a line connecting the points.
4. Use the U and V fields to enter the following coordinates for the third point on the rectangle:
U 20
V -4.2
5. Use the U and V fields to enter the following coordinates for the fourth point on the rectangle:
U -20
V -4.2
Again, the offset distances change as you enter the coordinates of the second point.
6. Select the first point — the lower-left corner of the substrate (–20, –4) — twice, either by �
double-clicking or by entering the values and pressing Enter twice. The New Objects window
appears.
Assign a Name and Color
To define the name and color for the left microstrip:
1. Change the object’s Name to ground.
2. Change the object’s Color to magenta.
3. Click OK to complete the command.
The object ground occupies a thin region along the bottom edge of the substrate.
4-12 Creating the Model