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Investigation into the Design Parameters of Magnetrons (Final Report) |
Author: Ms Dawn Hammond, B.Eng,
AMIEE
Introduction
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.
Objectives
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.
Download the complete report in Word 6.0 (zipped 7,159 KB) or as the individual sections below.
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Download as Word 6.0 zipped |
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| Title page | 11 KB | |
| Contents | 14 KB | |
| Main report | 195 KB | 47 KB |
| Annexes | ||
| Annex A - Measurements on the Proline Oven | 1,318 KB | 217 KB |
| Annex B - Measurements on the Matsui Oven | 1,199 KB | 181 KB |
| Annex C - Measurements on the BellingOven | 1,279 KB | 193 KB |
| Annex D - Measurements on the Whirlpool Oven | 901 KB | 130 KB |
| Annex E - Measurements on the Amana Oven | 696 KB | 124 KB |
| Annex F - Fundamental Emission and Harmonics Comparison Plots | 327 KB | 54 KB |
| Annex G - Circuit Diagrams and Layout details | 13,961 KB | 6,035 KB |
| Annex H - Old Magnetron Test Results | 149 KB | 20 KB |
| Annex I - Belling Investigative Test Results | 338 KB | 52 KB |
| Annex J - Matsui Investigative Test Results | 313 KB | 48 KB |
| Annex K - Whirlpool Investigative Test Results | 103 KB | 19 KB |
| Annex L - Voltage Variation | 3,054 KB | 272 KB |
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