Hysteretic Voltage Regulator as a Dynamic Supply Modulator for Radar Power Amplifier

Pulse radars with active phased array antennas (APAA) are the most important component of the information infrastructure of any country. Despite the high level of radar development, work on their improvement does not stop. This is due, in particular, to the fact that a significant step towards improving APAA radars is the designing of transmit/receive modules with the ability to fast control output power, provided maximum energy efficiency is achieved. This paper presents a 1300 W dynamic supply modulator with an average efficiency of 92% for UHF-band radar high power amplifier with nonconstant envelope (amplitude-modulated) pulses. Envelope shaping of a pulsed waveform results in improved spectral confinement and increased information content compared with constant-envelope pulses.