A Linear Power Amplifier (LPA) is an RF or microwave amplifier that increases signal power while keeping the output waveform proportional to the input. Its main purpose is to amplify signals with minimal distortion, preserving both amplitude and phase accuracy. Linear power amplifiers operate in the linear region of the active device, which helps reduce harmonics and intermodulation products. This makes them well suited for applications where signal integrity and modulation quality are critical. Key Features: High linearity with low distortion Wide frequency coverage Stable gain and phase performance Good thermal stability for reliable operation Common Applications: Radar and electronic warfare systems RF and microwave communication systems Test and measurement equipment In short, linear power amplifiers are used when clean, accurate signal amplification is more important than maximum power efficiency.