Synthesis and Simulation Studies of a 10-kW 2.45-GHz CW Magnetron

Abstract

This paper describes a simple approach to electromagnetic design of vane-type resonant system for high-power high-efficient industrial continuous wave (CW) magnetrons. It uses empirical equations in conjunction with normalization techniques to synthesize all the parameters of the resonant structure and then optimize them through simulation using computer simulation technology, microwave studio/ particle studio. A method to select constant parameters in the empirical equations has been proposed and shown to be effective in designing practical high-power CW magnetrons. The approach has been benchmarked by designing and developing a double ring ten-vane resonator for a 10-kW output power at a 2.45 GHz ± 30 MHz frequency CW magnetron with a 75% efficiency. The measured circuit parameters such as π-mode frequency, quality factors, and circuit efficiency were found in good agreement with the computed one validating the effectiveness of the proposed design approach. The particle-in-cell simulation of this magnetron predicted that an output power of 10.98 kW can be achieved with an efficiency of 71.45%.Index Terms-Industrial magnetron, particle-in-cell (PIC) simulation, strap-and-vane resonator, virtual prototyping.

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