Patent ID: 8324983

Claim:
A dual signal plane waveguide coupler, comprising: a trough portion with a first trough and a second trough; the first trough and the second trough each provided with a bottom, an outer sidewall and an inner sidewall; the inner sidewall of the first trough and the inner sidewall of the second trough adjacent one another; a coupling slot between the inner sidewalls communicates between the first trough and the second trough; an inward projecting abutment provided in each outer sidewall, opposite the coupling slot; a cover closes the first trough and the second trough to form first and second waveguides; the cover including protrusions extending into the first trough and the second trough; the protrusions forming a stepped ridge with a plurality of steps in height; the steps provided with a maximum inward extension and a minimum lateral distance from the coupling slot at a center step proximate a center of the coupling slot.