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Simultaneous realization of fast scanning and random phase modulation for radar coded-aperture imaging (terahertz band)

Terahertz radar coded-aperture imaging technology based on fast scanning and random phase modulation can achieve high-resolution, forward-looking and staring imaging. Fast scanning with phase controlled needs accurate phase control, while random phase modulation would probably damage its accuracy. To verify the feasibility of simultaneous operation on the two function, this paper deduce the mathematical model of radiation field based on the quasi-optical scanning system of RCAI. The simulation is operated to strike a balance between accurate beam direction and enough phase randomness. Eventually, it proves the feasibility of RCAI, which can be widely applied into areas such as terminal guide, security check, etc.