Abstract—This research is to investigate frequency selective surface
(FSS) structure effect on WLAN application signal. The FSS structure
acts as a band pass square-loop filter to attenuate the rest signal other
than 2.45 GHz and increase the signal power of WLAN signal 2.45
GHz. All the simulation part was simulated by using Computer
Simulator Technology Microwave Studio software (CSTMWS). The
FSS structure was measured inside the anechoic chamber by using
horn antennas, and the ‘InSSIDer version 2.1’ software was used to
check the receive signal power of WLAN application signal. The
Taconic TLY-5 PCB board with dielectric constant, εr = 2.2 was used
to fabricate the FSS structure. The higher dielectric constant was led
the resonant frequency shifted to lower frequency. The FSS structure
effect on WIFI signal was investigated in difference environment and
distance. The FSS structure was increased the 2.45 GHz signal power
when pass through the FSS structure. The FSS structure can be used to
solve the problem of WLAN signal power at places with low wireless
coverage.