Experimental research on high resolution terahertz radar imaging
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Cai Yingwu,
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Yang Chen,
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Zeng Genghua,
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Huang Xiang,
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Wang Cheng,
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Jiang Ge,
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Li Ruzhong,
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Tao Ronghui,
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Zhang Jian,
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Zhou Chuanming,
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Yao Jun
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Abstract
The design and realization of a terahertz(THz) radar system with 0.14 THz carrier frequency and 5 GHz bandwidth have been presented. The Ka band signal was frequency-doubled to be used as the local oscillator signal for sub-harmonic mixer in the systems transceiver chain. For the transmitted signal was a linearly frequency-modulated continuous-wave(LFM-CW), the dechirp technique was used in the THz radar receiver front end. By using this THz radar system, 3 cm high resolution range profiles were obtained as well as inverse synthetic aperture radar(ISAR) images, which exactly represent the subtle features of targets.
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