Influence of two antenna polarization modes on detecting effect of Lifeª²Detection Instrument

    ZHANG Yang, WANG Jianª²Qi, JIAO Teng, JING Xiª²Jing, XIE Sheng

    Department of Electronics, School of Biomedical Engineering, Fourth Military Medical University, Xi¬ðan 710033, China

    ¡¾Abstract¡¿ AIM: To discuss the influence of two antenna polarization modes (horizontal polarization and vertical polarization) on the detecting effect of Lifeª²Detection Instrument. METHODS: Respiration signal in horizontal polarization and vertical polarization modes on 10 people were respectively sampled and the amplitudes of the two types of signals were compared. The power of signals in the two polarization modes was estimated, and paired tª²test on the estimated values of the power in the 2 groups was conducted. RESULTS: The amplitude of respiration wave in horizontal polarization mode was higher than that in vertical polarization mode. Significant difference existed in the power in the two polarization modes(P<0.01). CONCLUSION: Power of respiration signal in horizontal polarization mode is obviously higher than that in vertical polarization mode. When testing the standing objects, the detecting effect in horizontal polarization mode is better than that in vertical polarization mode. ......