We report in this study novel topology of terahertz imaging system, including a single-radar multi-output guided system. We propose the integration of a frequency modulated continuous wave (FMCW) radar at 120 GHz with multiple plastic waveguides allowing to do sensing in reflection mode with multiple ouputs. The FMCW radar, from Indie Semiconductor, which has an antenna on package, is directly coupled to nine HIPS waveguides which are placed front of the package. These different waveguides, made with additive manufacturing HIPS, then move away in three dimensions, each have a different distance and go towards a line on which they are all aligned, to take a measurement in reflectometry. The radar then mesure the reflected signal, and after processing, we extract the time of flight. The difference of each path allow to determine the peak coming from each pixeL This simple and direct coupling allows a compact setup without requiring expensive metal waveguide and couplers. This speed up by nice the imaging measurement which can be useful for FMCW radar imaging application like non-destructive testing, particularly in industrial process and inline control. We propose to present both tinite difference time tomain simulation with CST Mcrowave Studio software, experimental integration and results ans discussion.