Operation modes of the relativistic magnetron at millimeter wavelengths

The operation of millimeter-wave relativistic magnetrons is considered for devices of the traditional and the inverted design. The high-voltage, pulsed devices employ explosive emission of electrons in electric fields about (1÷5)·10
⁷
V/m near the emitting surface. The electric parameters like these allow magnetron generation with either polarity of the DC driving pulse, both in the traditional and inverted configuration, thus enabling four combinations of geometry and voltage polarity. The operation modes where the source of electrons is near the slow-wave structure have been studied for the first time.