Skip to main content

Non-aerial factors affecting transmission

Unless you're using your devices in a vacuum with clear line of sight between aerials the following will have an affect:

  • Weather (temperature, humidity & air pressure),
  • Transmission power, spreading and other associated channel factors,
  • Number of nodes within reach in the mesh (affects retries consequent duty cycle hit),
  • Absorption by materials (with varying degrees attenuation, by material and depth),
  • Reflection off surfaces (and channeled through material tunnels, including warm / cold air tunnels commonly present in the atmosphere),
  • Diffraction around obstacles (over forests and around corners).

Environmental factors#

For a bit of light reading on environmental research:

In summary - wavelengths in Europe fair well in plain sight, curve over not-so-tall obstacles (including trees), reflect of surfaces at low angles of incidence. They go through humans without much attenuation; but not brick or stone or anything much above glass / kevlar. Oh, and don’t sit under an LTE tower and expect it to be plain sailing.