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Abstract:
This webinar will discuss the design process for creating a power amplifier using Wolfspeed GaN HEMT RF models in AWR. The focus of the presentation will be on the CGHV27030S, which is a 50V surface mount transistor housed in a DFN package. The target application is an avionics driver for Mode-S signal. The design specifications include 1030 – 1090 MHz target bandwidth, 18dB power of gain, 30 W of output power, and 65% drain efficiency. A primary consideration during the design was the thermal constraint due to the package under the high pulse chain of Mode-S. Design considerations, such as optimizing for efficiency and monitoring the dissipated power under temperature, made it possible to achieve a successful design. The design process will cover load pull, creating matching networks, focusing on specific performance goals, measuring junction temperature, and generating an accurate EM simulation. Finally a measured to model comparison will be shown to show the accuracy of the Wolfspeed GaN HEMT model.
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