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用射频穿透墙壁
虽然它是合理的众所周知，军事和执法机构利用射频技术（以及热，声，红外），让他们看到通过墙壁，它是不太认识到，有民用使用这种类型的技术，以及。
许多木匠，甚至“自己动手”房主已经发现了一个小磁螺柱发现可以帮助确定钉子被驱动到一个实心梁。然而，螺柱并不是墙上唯一值得关注的东西。偶然被金属钻头刺穿的电线会引发火灾。意外刺破煤气线可导致爆炸后果。视频线，电话线，报警系统线，网络，等等都可以不见了，同样脆弱。
现代低成本射频技术正在帮助使这种关注成为过去的事情。高频半导体和集成电路与先进的处理器和显示系统，使我们的X射线视觉，当谈到创建图像后墙板。
Other useful funcTIons can be performed with this technology including：
Presence-of-life detectors to find people buried in rubble
Finding underground and buried uTIlity and gas lines
TacTIcal entry or assault
A baby monitor that can detect through sheets， blankets， and duvets whether or not an infant is breathing
Surveillance devices
Bridge and deck inspecTIon
Land-mine detection （245 W can penetrate 2 to 4 meters depth at heights of less than 1 meter above the soil or road）
Fluid-level sensing
Automotive backup radar
This article looks at how RF can be used as a wall-penetrating technology and how images can be rendered from it. It examines some techniques and architectures designers can use as a starting point before refining their own designs. All parts， data sheets， tutorials， and development kits referenced here can be found on the Digi-Key website.
