Optimising Power Amplifier Performance with Load Pull Simulations
Power Amplifier designers need to achieve performance objectives such as output power, efficiency, gain, adjacent-channel leakage ratio, error vector magnitude, etc. These depend on the impedances presented to the input and output of the transistors as well as the bias point. Load pull is a tool to investigate performance variation with the load.
With nonlinear transistor models or measured load pull data, you can simulate to investigate performance and determine optimal load impedances. Next you can use this data to investigate performance and design and optimise impedance matching networks.
In two one-hour sessions we will show how to run various load pull simulations (including new, more advanced techniques) and use measured load pull data in PathWave ADS to design impedance matching networks.
On demand Webinars
Simulating Load Pull with PathWave ADS
Available On demand
Duration: 1 hour
This session will cover the following topics:
- Load pull simulation basics and Smith Chart region to be sampled
- Contours plots for a specific output power and gain compression point
- Avoid simulation convergence problems
- Investigation on the effects of reflections at the harmonics
- Interpolation of data between measured or simulated points
- Identification of regions where multiple, potentially competing specifications are satisfied
Analysing and Using Measured Load Pull Data for PA Design
Available On demand
Duration: 1 hour
This session will cover the following topics:
- How to read in and analyse measured load pull data
- Using measured load pull data to optimise impedance matching networks, including interpolation between measured load points
- Applying measured load pull data for Doherty PA design
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