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MEASURED MODULATION WAVEFORM OF LEAKAGE RADIATION FROM MICROWAVE OVENS

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Leakage radiation from 2450 MHz and 915 MHz microwave ovens was essentially 100% amplitude-modulated with frequency components in ranges where biological effects have been reported.

Plain English Summary

Summary written for general audiences

Researchers measured amplitude-modulated leakage waveforms from 2450 MHz and 915 MHz microwave ovens using a miniature 3-D probe with microwave-diode detector chips. The ovens were made to leak radiation by inserting teflon strips between door seals, and detected envelopes were recorded on analog tape, played back faster, and plotted on an XY recorder. Both ovens' leakage radiation was essentially 100% modulated with large fluctuations. Both modulation spectra contained frequencies within the 3-30 Hz range where biological effects of modulated RF radiation have been reported.

Why This Matters

The study notes that microwave oven leakage is known to be low-frequency amplitude-modulated due to the mode-stirrer built into the ovens. Frequency spectra were analyzed using a low-frequency spectrum analyzer.

Cite This Study
Unknown (n.d.). MEASURED MODULATION WAVEFORM OF LEAKAGE RADIATION FROM MICROWAVE OVENS.
Show BibTeX
@article{measured_modulation_waveform_of_leakage_radiation_from_microwave_ovens_g5484,
  author = {Unknown},
  title = {MEASURED MODULATION WAVEFORM OF LEAKAGE RADIATION FROM MICROWAVE OVENS},
  year = {n.d.},
  
  
}
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Quick Questions About This Study

Researchers measured amplitude-modulated leakage waveforms from 2450 MHz and 915 MHz microwave ovens.
Teflon strips were inserted between the door seals to make the ovens leak radiation.
The 2450 MHz oven's modulation spectrum spanned 0 to 500 Hz and was dominated by 60 Hz and 4 Hz harmonics.
Yes, both modulation spectra contained frequencies within the 3 to 30 Hz range where biological effects of modulated RF radiation have been reported.