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透过一英尺厚的墙壁,“看”到墙那边人的位置、移动速度和动向,甚至根据细微的呼吸探测到静止不动的人,这就是英国国防部最近资助研究的Wi-Fi穿墙雷达。体积小巧的它非常适合巷战或警方解救人质的行动。而且由于其本身并不发射任何无线电波,所以不会被反雷达装置侦测出来。20世纪30年代,美国海军研究人员偶然发现了雷达的原理:当他们看到飞机飞过无线电发射塔时反射了无线电波。而如今的美国有61%
Through one-foot-thick walls, “watching” the location, speed and movement of people over the wall, and even resting on subtle breaths, this is what the Department of Defense recently funded the study of Wi- Fi through the wall radar. Small size it is ideal for street fighting or police rescue hostages action. And because it does not emit any radio waves, it will not be detected by the anti-radar device. In the 1930s, US naval researchers accidentally discovered the radar principle: they reflected radio waves as they saw the aircraft fly over the radio tower. And now the United States has 61%