An RF power amplifier typically operates in a saturated output power (Psat) condition to deliver the maximum possible output power for a given input signal. Operating at Psat typically maximizes the amplifier’s efficiency, as it delivers the highest output power relative to the input power. However, in the Psat condition, the amplifier’s linearity is compromised, leading to potential signal distortion. This distortion is acceptable in applications where maximum power is more critical than signal fidelity. Power amplifiers are commonly used in radar systems, communication transmitters, and electronic warfare, where high power output is essential. These amplifiers are designed with specific biasing, matching networks, and cooling systems to optimize performance at Psat.
