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Investigation into the design parameters of magnetrons

A report for the Radiocommunications Agency by York EMC Services Ltd, University of York

Author: Ms Dawn Hammond, B.Eng, AMIEE


The problem of spectrum pollution from ‘non wireless telegraphy’ sources can affect the spectrum allocation. Magnetrons are often employed as a relatively cheap and reliable source of high power microwave energy for heating, lighting, and radiolocation. Domestic uses include microwave ovens with powers in the region of 1kW.


The objectives of the study were to: Identify those aspects of Magnetron tube and associated circuit design that can adversely affect their spectral output and stability. Assess whether it is feasible to optimise any or all the aspects identified in order to improve the performance of commercial products and whether, in practice, this would contribute to the reduction of spectrum pollution.


Format Document
PDF Main Report (106 kB)
PDF Annex A - Measurements on the Proline Oven (344 kB)
PDF Annex B - Measurements on the Matsui Oven (312 kB)
PDF Annex C - Measurements on the Belling Oven (335 kB)
PDF Annex D - Measurements on the Whirlpool Oven (245 kB)
PDF Annex E - Measurements on the Amana Oven (188 kB)
PDF Annex F - Fundamental Emission and Harmonics Comparison Plots (82 kB)
PDF Annex G - Circuit Diagrams and Layout details (2,667 kB)
PDF Annex H - Old Magnetron Test Results (38 kB)
PDF Annex I - Belling Investigative Test Results (87 kB)
PDF Annex J - Matsui Investigative Test Results (82 kB)
PDF Annex K - Whirlpool Investigative Test Results (30 kB)
PDF Annex L - Voltage Variation Test Results (171 kB)

Last Updated: 2006-Feb-01