Abstract
To address the inherent power limitations in a single relativistic magnetron (RM), we explore the feasibility of coupling multiple phase-locked RMs without compromising power conversion efficiencies. Successful phase locking of two coupled A6 RMs, where radiations are axially extracted as TE11 modes, has been achieved. The interaction between the two RMs is facilitated by a well-designed waveguide with a transmission coefficient exceeding 98% in the L-band. In our designed system, as per the particle-in-cell simulation results with a diode voltage of 560 kV, the RMs' peak power of the Gaussian radiation pattern reaches approximately 3.4 GW. The relative phase jitter between these two tubes is effectively controlled within ±1.6%, and the power conversion efficiency reaches up to 48.1%. This study presents a viable approach to enhance the output power of RMs while maintaining phase-locked Gaussian radiation patterns.
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