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How do different household materials obstruct WiFi signals?

For my 2012-13 School Science Fair, I will test how different household materials block WiFi signals.
by Ryan LePrell on 14 November 2012

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Transcript of How do different household materials obstruct WiFi signals?

What materials
reflect signals?









What materials absorb signals? How do different household
materials effect WiFi signal strength? The purpose of my project is to show what materials can negatively effect WiFi signals. PURPOSE What materials reflect, absorb, or otherwise obstruct WiFi signals? Question I hypothesize that metal doors and exterior walls will have the greatest negative effect on WiFi, and HYPOTHESIS Level
Meter Stick
Router
Laptop
NetStumbler software
log book
2 chairs MATERIALS METHODS As seen in the double bar graph, the metal door had the
largest effect on the WiFi
signals, especially
the 5 GHz signal. Predictably, the unobstructed
control test had the least effect on the signals. The
strongest effects
are caused by
thick and reflective materials- metal doors and
exterior wall. Also, the weakest effects
are caused by the
thinner, more flexible
materials- fiberglass door and interior walls RESULTS The control was an unobstructed 60 cm distance between the two devices- the router and the laptop that was measuring the strength. All electronic devices that could interfere were shut down. 60 centimeters was the standard distance between the two devices, even through a wall. 2.4 GHz and 5 GHz tests were done simultaneously. I measured the thickness of the wall or door, subtracted the thickness from 60 cm, and divided the answer by two. The final product was the distance that the router or laptop is should be placed from the wall. After properly placing the electronics, run “NetStumbler”, a program that measures WiFi signal strength. I reset the router and program for each trial, and restarted the computer after every material’s test. I used a level to make sure that the laptop’s antennae was straight up. I logged the maximum signal strength after one minute, and then I quit the program. I repeated each measurement three times after quitting the program.

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