Frequency Selectivity of Window Attenuation up to 100 GHz

This paper presents highly accurate measurements of glass pane attenuation for radiowave transmission in the range 5-60 GHz. For this purpose, a measurement setup and analysis method for minimizing the impact of multipath in a scattering environment has successfully been developed. The obtained results match perfectly the textbook theory for multilayer slabs provided by ITU-R Recommendation P.2040. Moreover, the P.2040 model for complex permeability, including parameter values for glass, matches the measurements very well. Only slight adjustments of corresponding parameter values are required in some cases. Also, in the case of metalized glass the match between model and measurements is very good. The perfect match between model and measurements proves that the modelling provided in P.2040 is reliable for use in any window attenuation simulations. Though no measurements were performed for multiple panes it is expected that the model is valid also for this case.