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PathWave Design Software
Formerly known as Keysight EEsof EDA
Chapter 2: Tuning and Optimization
What is Tuning?
Tuning is a way to change the component values and see the impact on circuit
performance. This is a manual way of achieving the required performance from a
circuit, which works well in certain cases.
What is Optimization?
Optimization is an automated procedure of achieving the circuit performance in
which PathWave Advance Design System (ADS) can modify the circuit component
values in order to meet the specific optimization goals. Please note that care should
be taken while setting the goals to be achieved and it should be practically possible,
otherwise it will not be possible to meet the goals. Also, the component values
which are being optimized should be within the practical limits and this needs to be
decided by designers considering the practical limitations.
Figure 1. Schematic
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Tuning in PathWave ADS
This step introduces the PathWave ADS tuning feature that allow you to tune parameter values and see
the simulation results in the data display in real time. For this feature you select the tuning feature first
and then you select the component that will be tuned. Let us take the LPF circuit example that we
designed in the “Getting Started with PathWave ADS” section and tune the component values in order to
improve the circuit performance.
1. Open the LPF schematic. If you need help creating this schematic you can download “Getting
Started with PathWave ADS” section of this book. Delete or deactivate using the Display
Template component and simulate .
2. In the data display, delete all the plots and insert a new rectangular plot on top right of the palette.
3. Click the data display page and select S(1,1) and S(2,1) from the pop-up window and click Add>>
and select units as dB when prompted.
Figure 2. Pallete Figure 3. Add S_Parameters
4. Click OK to see the data display as shown in Figure 4.