If you have bad coverage in a part of your home — or just outside — the answer can be in the building materials of the house, and how much signal loss comes from having to pass through these materials.
Concrete, with and without metal reinforcement, is one of the worst building materials for wireless signals to pass through, but masonry block and bricks can also be serious barriers for Wi-Fi. Plywood and drywall come close to zero signal loss in tests.
The numbers in the graphic above and the table below are based on the findings in extensive experiments performed by the US National Institute of Standards and Technology.
|Materiale||Tap i decibel ved 5 GHz|
|Concrete (203 mm)||55,1581|
|Brick-faced masonry block||32,6320|
|Concrete (102 mm)||26,0008|
These figures are taken from the report "Electromagnetic Signal Attenuation in Construction Materials", NIST Construction Automation Program Report No. 3 from the National Institute of Standards and Technology.
Hele forskningsrapporten kan leses her: http://fire.nist.gov/bfrlpubs/build97/art123.html
Article by Jorunn D. Newth