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How do Cell Phones-in Cities-Work? September 7, 2006

Posted by healthyself in 2.4 GHz, 5 GHz, Biological Effects, Blogroll, Cell phone industry, Cell phone safety, Cell phone towers, Cell Phones, Definitions, Electromagnetic pollution, Electromagnetic waves, Electrosensitivity, Emergency Medicine, EMF Research, EMF's, EMR, Environment, Firehouses, High Frequencies, high voltage transmission lines, HOuseholds, Hz, Legal Issues, Lifestyle, Long Term Health Risks, Low Frequencies, Men's Health, MHz, Microwave exposure, mobile telephones, Monitoring, Public Policy, Pulsed Radiation, radiation, Risk of Disease, Safe Levels, School administrators, Transfer, transmission, Who is Affected?, Women's Health, Workplace.
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“The frequencies used by cellphones are in the line-of-sight range. So how do they work in cities? The answer is a combination of the following effects:

  • r-4 propagation over the rooftop landscape
  • diffraction into the ‘street canyon’ below
  • multi-path reflection along the street
  • diffraction through windows, and attenuated passage through walls, into the building
  • reflection, diffraction, and attenuated passage through internal walls, floors and ceilings within the building

The combination of all these effects makes the cellphone propagation environment highly complex…”

http://en.wikipedia.org/wiki/Line-of-sight

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