Electromagnetic Intermodulation Interference using Quartz Oscillators
碩士 === 國立高雄大學 === 電機工程學系碩士班 === 102 === This thesis studied the stability of oscillator in air, using quartz as emitter to measure electro-magnetic-interference (EMI) via intermodulation signals with quartz receiver. The experiments used de-capped quartz to enlarge receiving areas, rather than elimi...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/09326138733953988190 |
| Summary: | 碩士 === 國立高雄大學 === 電機工程學系碩士班 === 102 === This thesis studied the stability of oscillator in air, using quartz as emitter to measure electro-magnetic-interference (EMI) via intermodulation signals with quartz receiver. The experiments used de-capped quartz to enlarge receiving areas, rather than eliminate shielding effects. The measurement evaluated one of the receiving powers at intermodulation. The impacts of distance between quartz emitter and receiver, intermodulation power of multi-emitter and quartz receiver’s angles were evaluated. The results indicate that the power of intermodulation roughly decreases with the reciprocal distance square. Intermodulation was superimposable with consistent power at intermodulation frequencies. Accordingly, the study illustrated the polar plot of intermodulation related to receiver’s angles to received power. This can be used to evaluate EMI conditions when noise sources are known.
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