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 |
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Main Report (106 kB) |
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Annex A - Measurements on the Proline Oven (344 kB) |
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Annex B - Measurements on the Matsui Oven (312 kB) |
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Annex C - Measurements on the Belling Oven (335 kB) |
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Annex D - Measurements on the Whirlpool Oven (245 kB) |
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Annex E - Measurements on the Amana Oven (188 kB) |
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Annex F - Fundamental Emission and Harmonics Comparison Plots (82 kB) |
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Annex G - Circuit Diagrams and Layout details (2,667 kB) |
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Annex H - Old Magnetron Test Results (38 kB) |
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Annex I - Belling Investigative Test Results (87 kB) |
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Annex J - Matsui Investigative Test Results (82 kB) |
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Annex K - Whirlpool Investigative Test Results (30 kB) |
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Annex L - Voltage Variation Test Results (171 kB) |
Last Updated: 2006-Feb-01
