Measurements of antenna polarization effects on Ultra-Wideband monitoring and localization

This paper presents the effect of the polarization of antennas used in Ultra-Wideband systems for positioning applications. Measurements have been conducted using the DecaWave DWM1000 module and its antennas on both the transmitter (tag) and receiver (anchor) sides. The received power with the anchor-tag distance were measured with two configurations, co-polarization and cross-polarization of the two antennas. Results in real indoor scenario show that RSSI is strongly affected by the polarization sense for distance lower than 10m. For larger distance, the polarization mismatch has a negligible effect.