This solution brief introduces an end-to-end workflow for designing and optimizing a small-signal FET amplifier using Keysight PathWave ADS and optional source measure units. Engineers begin with transistor I-V behavior and bias selection, then perform schematic design, DC and AC simulation, gain and noise analysis, Smith Chart impedance matching, stability verification, and parameter optimization. Measurement data can be incorporated to validate device models and compare simulated performance with a physical DUT. The closed-loop process connects semiconductor device physics to RF system behavior, helping teams understand how biasing, matching networks, noise, gain, and stability affect amplifier performance. The modular solution supports education, R&D, commercial design, and production r

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