The plasma microwave radiation, as a novel high power microwave(HPM) source, has gotten more attention in recent years for its merits of broadband, coherent emission and tunable frequency.

近年来，等离子体微波辐射作为新兴高功率微波源，因其具有频带宽、相干和可调谐等优点，因而受到国际上的广泛关注。

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A tunable GaAlAs diode laser is used as a chirp signal source, the distance is detected by calculating the beat frequency.

由可调谐半导体激光器产生一个啁啾信号，通过测量拍信号频率计算距离。

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