A 1-MW L-band coaxial magnetron with separate cavity

This paper describes an L-band coaxial magnetron using novel construction techniques. The tube is designed as a "plug-in" into a separate TE011mode cavity which controls frequency and allows external tuning. The magnetic circuit is complete within the tube package. The tube was designed to operate at 25 kV, which is quite low for this power level. It is believed that this design technique makes coaxial magnetron design at the lower frequencies practical. The total weight of cavity plus tube is less than 60 pounds. Power output of over 1 MW is achieved over 60 percent of the desired band of 1250 to 1350 MHz. Reduced power output is achieved over the remaining portion of the band.