Microwaves are low intensity waves, with a wavelength of around 80,000 cm. However, because microwaves don’t get much hotter or colder than room temperature, microwaves must be highly transmitted to achieve a measurable effect and a low level of emissions. Transmitter power in microwaves can be as low as 50 W and the maximum transmission distance of microwave ovens varies from 50cm to 100m.”
Australian Consumer law 2010, Reg 20.6, Part 5, Microwaves and other electromagnetic fields Estimated average Australian household energy usage per week is 157Wh (71.23 US Gal), with the majority of this (42%) being used in transport. The technique of frequency division multiple access (FDM) may help mitigate some people’s concerns as it can direct the emitted wave into a more efficient route, through a thinner and more directional waveguide. However, an FDM microwave has no effect on radiofrequency emissions in the 2.4GHz range, which is currently the major microwave frequency bands where concern around RF Emissions is a major issue. Simultaneously, an FDM microwave works by applying heat to divide a wave into segments.
The microwave oven’s reflector heats the microwave wave up so that it is not as uniform at the transmitter as the standard microwave oven has. This produces the green or white heat glow of visible light in an FDM microwave oven. With the split, the wave is more directional and requires less energy to get the same temperature. However, an even simpler form of FDM, known as digital microwave, can reduce overall power consumption of an oven by converting live microwaves to digital form and scanning the microwave oven’s internal antenna to receive the transmitted signal. This is called uninterruptible power supply (UPS). Apple have stated that they do not use uninterruptible power supply, (UMP), in their microwaves.
Damage to a microwave oven is due to external electrical shock, so an UPP would be particularly detrimental in this scenario. Because low power noise is not the primary cause of most microwaves causing damage to people, the majority of leakages result from electromagnetic fields generated within the microwave oven. For example, internal reflections from the inner workings of an electric stove, white noise generated by the ticking of an electronic clock can create high levels of radiation within an microvwave oven. Internal reflections caused by an improperly fitted oven lid can create high levels of radiation outside the oven. Another issue is poor alignment of the cooking surface; left aligned it may not be possible to prevent the outgoing microwaves from getting trapped between the cooking surface and the door.