Why Does My Phone Signal Fluctuate When I am Not Moving ?

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Offline neilep

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well ?

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« Last Edit: 23/12/2009 16:02:54 by neilep »
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Offline graham.d

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Why Does My Phone Signal Fluctuate When I am Not Moving ?
« Reply #1 on: 24/12/2009 10:02:59 »
The wavelength is very short (a few cm) so even small movements can change your position and affect how all the waves, reflected off other objects and arriving at the aerial via various (multipath) routes, are summed. If you keep the phone very still it will be fairly good, but even then the multipath routes can be reflections off other people, vehicles, trees etc which can all be moving. The signals, being waves, can reinforce or cancel depending on their relative phases, so the received signal strength will fluctuate.

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Offline neilep

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Why Does My Phone Signal Fluctuate When I am Not Moving ?
« Reply #2 on: 24/12/2009 12:37:29 »
The wavelength is very short (a few cm) so even small movements can change your position and affect how all the waves, reflected off other objects and arriving at the aerial via various (multipath) routes, are summed. If you keep the phone very still it will be fairly good, but even then the multipath routes can be reflections off other people, vehicles, trees etc which can all be moving. The signals, being waves, can reinforce or cancel depending on their relative phases, so the received signal strength will fluctuate.

EXCELLENT !!...thank ewe for the brilliant answer Graham !! Graham is great !

I had no idea the wavelength was so short !

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Offline Zufolek

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Why Does My Phone Signal Fluctuate When I am Not Moving ?
« Reply #3 on: 26/12/2009 12:57:25 »
The atmosphere might also have a little impact on signal strength.