Minimization of shielding effectiveness of energy saving windows in WiFi frequency range

  • E. Bilotas
  • P. Ragulis
  • Ž. Kancleris
Keywords: energy saving windows, shielding effectiveness, microwave propagation, WiFi, Fabry–Perot resonance


We investigated the dependence of shielding effectiveness of energy saving double-glazed windows on their longitudinal dimensions (thickness of metalized and uncoated glass panes and the gap between them) both experimentally and theoretically. It was shown that by changing the longitudinal dimension of the window the minimum of shielding effectiveness could be shifted to the desirable frequency range. Applying this approach to the WiFi frequency range we demonstrated that shielding effectiveness can be decreased by 7–9 dB for the 2.4 GHz WiFi connection and by 14–17 dB for the 5 GHz connection in comparison with that of an ordinary energy saving double-glazed window. Theoretical considerations have been confirmed by experimental investigation of the dependence of shielding effectiveness on the gap between glass panes.
Electrodynamics and Wave Processes