An inexpensive and compact short-range radar, which is capable of beam steering and operates at 330–500 GHz, can be used to detect heartbeat-induced chest motions through a person’s clothes.

中文翻译：

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低成本的波束控制雷达

一种廉价且紧凑的短距离雷达，能够进行波束控制并在330–500 GHz范围内运行，可用于检测人的衣服引起的心跳引起的胸部运动。