THz Micro-Doppler Measurements Based On A Silicon-Based Picosecond Pulse Radiator
THz Micro-Doppler Measurements Based On A Silicon-Based Picosecond Pulse Radiator
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DOI：
10.1109/mwsym.2019.8700953
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
Sam Razavian;M. Assefzadeh;M. Hosseini;A. Babakhani
中科院分区：
文献类型：
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作者：
Sam Razavian;M. Assefzadeh;M. Hosseini;A. Babakhani
在本文中，一个定制的皮秒脉冲辐射器被用来演示在太赫兹（THz）制度的微多普勒现象。在微多普勒效应中，雷达目标的周期性运动调制从其表面反射的电磁波的频率。调制深度取决于振动的强度和载波频率。因此，使用太赫兹范围内的载波音调可以检测弱微多普勒特征。在该实验中，使用频率为50至700 Hz的声音振动来调制由数字脉冲（D2I）硅芯片产生的395.2 GHz载波信号。一个十秒的音乐轨道，啁啾声，和多个频率的音调由扬声器产生，然后通过微多普勒效应重建。在接收器处通过频率解调来恢复声波。
In this paper, a custom picosecond pulse radiator is used to demonstrate the micro-Doppler phenomenon in the Terahertz (THz) regime. In the micro-Doppler effect, the periodic movement of radar targets modulates the frequency of the electromagnetic waves reflected from their surface. The modulation depth is dependant on the intensity of the vibrations and the carrier frequency. Therefore, using carrier tones in the THz regime enables detection of weak micro-Doppler signatures. In this experiment, sound vibrations with frequency of 50 to 700 Hz were used to modulate a 395.2 GHz carrier signal produced by a digital-to-impulse (D2I) silicon chip. A ten-second music track, a chirp sound, and multiple frequency tones were produced by a speaker and then were reconstructed through the micro-Doppler effect. The sound waves were recovered via frequency demodulation at the receiver.