DIYbanter - View Single Post

In message .com,
writes
A microwave oven is a good choice, because it will NOT completely block
the signal. This is because the door seals use a quarter wave
transmission line structure which means that an open circuit is
converted into a short circuit at the operating frequency. Hence they
avoid the need for metallic contacts which would become ineffective
when covered in food residues. They just need close proximity between
the door and the oven.

Mobile phones use different frequencies to microwave ovens, so the oven
door seals will attenuate but not totally block the signal. (I just
tried it with my GPRS phone on Orange - the signal dropped from 4 bars
to 1.

Didya switch the microwave on ?
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geoff