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Old 6-Jan-2012, 3:46 PM   #6
Antennas Direct Tech Supp
Join Date: Jan 2010
Posts: 2,942
If the elevator doors are operated by electrical motors, they may be emitting RFI that is being picked up by the antennas.

The alternative explanation is that the elevator doors are changing the complex patterns of signal reflections inside the building enough to cause what is generally called "multi-path interference".
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