Study and analysis of ultra wideband through glass propagation channel characteristics

摘要

This paper presents an experimental investigation of ultra-wideband (UWB) radio propagation through glass in the (3-8 GHz) frequency range using compact and cost-effective planar microstrip antennas. Channel parameters such as path loss magnitude, rms delay spread, received signal amplitude and multipath have been analyzed from the measured data. Results and analyses highlight the variation of the channel parameters when the glass is rotated at different angles ranging from 0 to 90 degrees mimicking the movement of a door or window present in an indoor environment. Measurement data is also used in predicting different LOS, partial NLOS and NLOS situations which are dependent on the rotation angle of the glass sheet and also the position of the Tx-Rx antennas. Results indicate higher multipath and rms delay spread for edge scattering in comparison to direct through glass propagation. Path loss magnitude varies by 2 to 4 dB for NLOS scenarios in comparison to LOS scenarios. RMS delay spread values increase by 3 to 5 nsec for NLOS scenarios and multipath components by 10 to 15. The study gives an overview on the indoor propagation characteristics of the channel in the presence of glass sheet which acts like an obstacle causing variation in the channel link.