Optimal Operating Conditions Based on Mode Competition for Maximum Efficiency of Double-Strapped Magnetron

A magnetron is used as a core element in various fields such as environment, medical, and space, and in high-power microwave (HPM) for electromagnetic compatibility (EMC). Therefore, the efficient design of the magnetron is important for a system to function. This paper describes the optimal operating conditions to design L-band double-strapped magnetron with the maximum efficiency. We analyze the relationship between mode competition and operating points for π-mode oscillation. Understanding the phenomenon that all formable modes compete with each other based on the force from the E-field for each mode and the cyclotron frequency in a given operating condition, we find the operating conditions for maximum efficiency of the magnetron. Simulations are performed using a particle-in-cell (PIC) solver of a highly reliable CST-particle studio (PS) tool, and the details are explained. In addition, various output characteristics of the operating conditions of the magnetron are described.