LAUSR

We propose a compact dual-frequency relativistic magnetron with TEM mode output. The resonant system consists of two axially separated beam–wave interaction regions for generating dual-frequency microwave. Under the same diode voltage and axial magnetic field, the RF field of the operating $\pi $ -mode can almost be simultaneously established. Furthermore, the diffraction output and the all cavity axial extraction are integrated to realize the TEM mode output. Particle-in-cell simulation shows that when the diode voltage is 400 kV, microwaves with output powers of 740 and 876 MW generate, with frequencies of 2.05 and 2.35 GHz, respectively. With an axial magnetic field of 0.44 T, the device efficiency of over 43% in the dual-frequency relativistic magnetron is achieved.