Design and Implementation of a Post Regulator Circuit to Achieve A High MTI Improvement Factor in a Phase Array Radar Transmitter

In MTI tracking radars, one of the main factors for canceling clutter at the radar transmitter output and increasing MTI filter improvement factor is the reduction of cathode power supply voltage ripples. Voltage ripples can be compensated by inserting a post regulator circuit at the output of the amplifier tube. In this paper, the post-regulator circuit needed to reduce the intra-pulse ripple of a X -band 75KW Klystron transmitter, in order to achieve a 50dB MTI improvement factor is first simulated and then designed and implemented and the test results are presented. The main feature of the presented work is the design and implementation of a post-regulator circuit for a 0.05% voltage ripple level in a high frequency X -band 75 KW Klystron transmitter with a 20KV voltage level and 20A current with a 7% duty cycle. The presented circuit has been implemented with semiconductor technology, which by itself, is an innovation in the circuits of this type.