TECHNOLOGIES & APPLICATIONS
A TRANSISTOR-BASED MODULATOR FOR A MICROWAVE MAGNETRON
A modulator designed as a power supply for a microwave magnetron with an output peak power of radiation 3 MW is described. The 100 transistors used in the modulator are connected in parallel, and their capacitors are switched to the primary winding of a pulse transformer.
- Load pulse power - 5 MW
- Primary peak voltage - 850 V
- Primary peak current - 6600 A
- Secondary peak voltage - 50 kV
- Secondary peak current - 100 A
- Pulse duration - 0,6-6 µs
- Pulse risetime - Less than 0,5 µs
- Pulse repetition rate 200 Hz - (duration 6 µs)
A functional diagram of the modulator
Fig. 1. Oscillograms of the modulator (1) voltage (14 kV/div)
and (2) current (35 A/div) measured
at a 500-active load. Time base: 1 µs/div.
Fig. 2. Oscillograms of (1) the voltage pulse across
the magnetron (14 kV/div) and (2)
the generated microwave pulse. Time base: 1 µs/div.
For further information please contact:
Vadim A. Vizir
Dr. Sci. (Engineering), Leading Researcher
Phone: (3822) 49-26-73, Fax: (3822) 49-27-51
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