From Table II, indoor environment with distance 100 cm
between WIFI source and receiver have highest increment of
average signal power, 19 dBm. From the analysis, all the
average signal power with FSS structure attaches to netbook
was always stronger than without attach FSS structure to
netbook. For the indoor environment with wall gap between the
WIFI source and receiver, the signal strength was weaker
compare with indoor without wall gap. Walls are a structurebuilt by different type of material such as metal, wood, ceramic,
and etc. Some walls are containing materials which can reflect
or absorber signal. Therefore, the average signal power of
indoor environment with wall gap was weaker than both indoor
environments