| Summary: | The interest in microwave imaging system is increasing because it can serve as a useful tool for concealed threat detecting. The current imaging systems have two major challenges: (i) multi-static arrays suffer from complex hardware design and ineffective backprojection-imaging algorithm, and (ii) monostatic linear arrays suffer from large scanning time due to the electronically scanning one by one of the co-located receive–transmit antennas. To address these challenges, this study introduces a novel linear imaging array based on automotive radar chips and sub-array time-division multiple-input multiple-output working principles, which is hardware efficient and compatible fast Fourier transform (FFT) imaging technique. Through simulation, it is shown that the scanning time is only one-fourth of the traditional monostatic linear array and the FFT image reconstruction technique can be used.
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