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作为雷达家族的新成员,微型雷达将步入人们的日常生活中。目前美国科学家已经研制出一种安装在芯片上、成本不到10美元的微型雷达。与传统的雷达连续发送波不同,这种微型雷达使用的是能发现近处物体的短电磁脉冲,每个脉冲都不超过十亿分之一秒,每秒大约发射一百万个这样的超短脉冲。因为脉冲极短,所以它能在比常规雷达更宽的无线电频带工作,而且不易受其它雷达系统的干扰。并且,由于它是在低频带工作,所以具有很好的穿透能力,不仅能
As a new member of the radar family, miniature radars will step into people’s daily lives. At present, U.S. scientists have developed a miniature radar that can be installed on a chip and cost less than 10 U.S. dollars. Unlike the traditional continuous-wave transmission of radars, this miniature radar uses short electromagnetic pulses that detect objects in the immediate vicinity, each at no more than one billionth of a second and about one million such ultra-pulses per second Short pulse. Because of the extremely short pulse, it works on a wider radio band than conventional radar and is less susceptible to interference from other radar systems. And because it works in the low frequency band, it has good penetration capabilities, not only