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A high efficiency and high power L-band relativistic magnetron with all-cavity extraction.

Relativistic magnetron (RM) is a promising high-power microwave source, whose advantages include high efficiency, high power, and compact configuration. Enhancing power efficiency and output power are the most important two development directions for RM. Based on the two targets, a high efficiency and high power RM is presented and investigated numerically and experimentally in this paper. When the diode voltage is 485 kV, the beam current is 6.9 kA, and the magnetic field is 0.34 T, and high power microwave is generated with the power of 1.35 GW, frequency of 1.47 GHz, and power efficiency of 40.3% in the experiments.