A77GHz Quasi-Optical Mirrors Systems for Space Routing of Lens Antenna’s Feed

In this paper, a system of two mirrors is used to shift the focal length of 3D printed lens antenna in space at millimeter wave band. The 3D-printed mirrors are sections of convex parabolic reflectors used to guide the radiated power of the lens feed antenna to a longer distance of 15cm for compact feed system design. This routing mirrors system shift allows for compact feed system design as a significantly low loss in millimeter-wave radar applications. The radiation patterns of two different feed antennas are reconstructed at 77GHz with less than 1dB reduction in the overall antenna gain.