The RADAR transmitter and precise pulse shaping are essential for range resolution, target detection, and magnetron efficiency. The modulator is the subsystem responsible for generating high‑voltage pulses with controlled width, shape, and timing. The modulator can produce pulses with amplitudes exceeding the supply voltage. The key mechanism is the use of a resonant charging choke to store and release energy rapidly, enabling higher peak pulse amplitude and delivering strong, clean pulses to the magnetron.
The pulse transformers and PFNs are the primary components shaping microwave energy bursts. Thyratrons and Thyristors are the most common high-power switching devices used in these circuits for fast switching, high voltage tolerance, and reliability under pulsed loads. Typical PFN construction is a series of inductors and shunt capacitors arranged to approximate a transmission line. This structure allows controlled energy discharge into the pulse transformer. Artificial transmission lines are used specifically to determine pulse shape and duration, with accurate timing and waveform control essential for stable magnetron operation and consistent RADAR performance.