Design of a W-band rising-sun anode magnetron

Abstract

A This paper presents our investigation into a W-band magnetron that consists of 12 pairs of rising-sun anode cavities and an axial funnel-to-waveguide output structure for improving mode separation and obtaining an efficient output power extraction. The EM simulation shows that the separation between π-mode and adjacent modes is more than 2GHz and the external Q value of π-mode is sufficient high for a stable operation in the optimized design. The ‘hot-test’ simulation shows that the magnetron is capable of delivering a maximum output power of 180 kW with an operation efficiency of 56.6% at 94.1GHz, under a moderate anode voltage of 31.9kV and magnetic field of 1.18Tesla.