墙体对微波脉冲的衰减特性

 研究墙体对微波脉冲的衰减特性，测量了微波脉冲垂直入射墙体后的脉冲信号，经过计算得到普通砖混墙、普通钢筋混凝土墙、钢筋网混凝土墙对窄带微波和超宽带微波的衰减值；分析了微波脉冲穿越不同墙体的频谱变化。研究结果表明，普通钢筋混凝土墙和普通砖混墙对窄带微波脉冲的衰减为0.342～0.699 dB/cm，对超宽带信号的衰减为0.134～0.183 dB/cm。钢筋网混凝土墙（厚65 cm）对超宽带信号的衰减较大（29.07～45.79 dB），同时使穿透墙体的超宽带信号频率分布向高频位移。

Attenuation characteristics of microwave pulse penetrating walls

The characteristics of microwave pulses from different sources penetrating various kind of walls were studied. The walls used in the experiment included common brick-mix wall, common reinforced concrete wall and reinforcing steel bar-net concrete wall. The microwave sources used were narrow band microwave source, 100 V UWB radiation source and single periodic UWB pulse radiation source. The attenuation and the change of spectrum for different electromagnetic pulse after penetrating various walls were provided and analyzed. For the narrow band pulse penetrating common brick-mix wall and common reinforced concrete wall, the attenuation was 0.342～0.699 dB/cm. For the UWB pulse penetrating common brick-mix wall and common reinforced concrete wall, the attenuation was 0.134～0.183 dB/cm. For reinforcing steel bar-net concrete wall(65 cm), the attenuation of UWB signal was quite large (29.07～45.79 dB), and the frequency distribution of UWB signal moved toward higher frequency after penetrating walls.