Title :
A study of oven magnetrons toward a transmitter for space applications
Author :
Mitani, Tomohiko ; Kawasaki, Haruo ; Shinohara, Naoki ; Matsumoto, Hiroshi
Author_Institution :
Res. Inst. for Sustainable Humanosphere, Kyoto Univ., Uji, Japan
Abstract :
The objective of the present study is to evaluate 2.45 GHz and 5.8 GHz oven magnetrons, toward a transmitter for space applications. Dc-rf efficiency and frequency spectrum of the oven magnetrons were measured. Significant improvement of efficiency and reduction of back bombardment energy must be necessary for the present 5.8 GHz oven magnetron to facilitate thermal management in space and to improve the frequency spectrum, respectively. Thermal vacuum tests of a 2.45 GHz oven magnetron were also conducted. From experimental results, the dc-rf efficiency was mainly dependent on magnet temperature. Therefore, thermal control of the magnets and pole pieces is essential for the highly-efficient magnetron operation in space.
Keywords :
aerospace instrumentation; magnetrons; magnets; transmitters; back bombardment energy; dc-rf efficiency; frequency 2.45 GHz; frequency 5.8 GHz; frequency spectrum; magnet temperature; oven magnetrons; pole pieces; space applications; thermal management; thermal vacuum test; transmitter; Anodes; Electromagnetic heating; Frequency measurement; Magnetrons; Microwave ovens; Satellites; Space exploration; Space power stations; Thermal management; Transmitters; low cost; oven magnetron; space applications; vacuum experiments;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193408
