Millimeter-Wave FMCW radar offers highresolution imaging and object detection capabilities, making it ideal for various applications including automotive radar, industrial sensing, security systems, and Imaging. This work presents the modeling of mmWave FMCW radar system for 2D SAR imaging for different objects like square, rectangle, triangle, and circle. The main objective is to reconstruct the object shapes with high resolution by developing numerical analysis. Utilizing MATLAB, the system is modeled and analyzed to achieve high-resolution imaging. The results show good prospects for the use of mmWave FMCW radar systems for imaging multiple objects with different shapes for SAR imaging.