Dimensionally-tolerant, compact, wideband, waveguide-to-monolithic microwave integrated circuit upward vertical transition

A radar sensor comprising:

• a waveguide interface that is electrically conductive, that is configured to contact a waveguide, and that includes a first aperture that is at least partially vertically aligned with a second aperture in the waveguide;
• a radio frequency (RF) feed that is electrically conductive;
• a first wing that is coplanar with the RF feed and the waveguide interface and that electrically connects the RF feed with the waveguide interface;
• a first electrically conductive layer that is electrically connected to a ground potential, that includes a third aperture that is at least partially aligned with the first and second apertures, and that includes a second wing that forms a portion of the third aperture,
• wherein the first wing extends away from a line through an axis of the RF feed in a direction toward a first surface of the first aperture, and
• wherein the second wing:
• extends away from the line toward a second surface of the first aperture that is opposite the first surface;
• and
• extends from the second surface further toward the first surface than a closest side of the RF feed to the first surface.