Abstract
Modern detection and sensing devices are mainly based on optical and microwave bands, but they all have certain shortcomings. Millimeter wave, as an electromagnetic wave in the range of 30~300GHz, has a wavelength range of 10mm~1mm and a frequency band between microwave and optical, and has the characteristics of taking into account the characteristics of both, and has been widely developed and applied in the field of imaging. In this paper, the millimetre-wave SAR imaging system is designed to image near-field Angle reflectors at high resolution using the time and frequency domain algorithms of rd and rma, and the imaging performance of these four algorithms is compared and analysed. The near-field radar imaging system is able to synthesise a virtual aperture for high-resolution imaging of Angle reflectors using high-precision guide rails moving at uniform speed, verifying the accuracy and validity of the experiments. In addition, the work improves reliable technical support for future in-vehicle millimetre-wave radar imaging and has some practical value.
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