Abstract: This document describes techniques, apparatuses, and systems for an antenna-to-printed circuit board (PCB) transition. An apparatus (e.g., a radar system) may include an MMIC or other processor to generate electromagnetic signals. The apparatus can include a PCB that includes multiple layers, a first surface, and a second surface that is opposite and in parallel with the first surface. The PCB can also include a dielectric-filled portion formed between the first surface and second surface. The apparatus can also include a conductive loop located on the first surface and connected to a pair of lines. The apparatus can further include a transition channel mounted on the first surface and positioned over the dielectric-filled portion. The described transition can reduce manufacturing costs and board sizes, reduce energy losses, and support a wide bandwidth.