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Ansoft Designer / Ansys Designer 在线帮助文档：

Smith Tool >
   Smith Tool Dialog >
       Display Tab >
           Circles

Circles

This group controls the display of circles in the chart display of the Smith Tool dialog.

The display of constant circles is controled by the following parameters. All quantities except circles of constant noise-figure are available at the source and load planes.

Parameter	Symbol	Reference Plane
Power Gain	Gp	Source and load planes
Available Gain	Ga	Source and load planes
Stability Factor	K	Source and load planes
Noise Figure	Noise	Source plane
Reflection Coefficient	Refl	Source and load planes

To display a circle:

1. Select a circle type.

2. Type a value in the Start box.

3. Click Apply.

To display a family of circles:

1. Select a circle type.

2. Select Step.

3. In the Start box, type the normalized value of the lowest-value grid you want to display.

4. In the Stop box, type the normalized value of the highest-value grid you want to display.

5. In the Incr box, type the step increment.

6. Click the appropriate parameter button.

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