Patent ID: 7746191

Claim:
A transition element for a perpendicular contact-free connection between a waveguide circuit and a microstrip technology line realized on a dielectric substrate, the transition element being mounted at an extremity of the waveguide circuit and comprising a securing flange for attachment to the substrate, said substrate featuring a conductive footprint for making the connection to a lower surface of the flange, and a cavity dimensioned for impedance matching with the waveguide circuit being realized opposite the extremity of the waveguide under the substrate, wherein the securing flange has a width d in the direction of the microstrip line, chosen to shift resonating modes away from an operating frequency band, d being a value inversely proportional to resonant frequency for a given height and width of the securing flange, the securing flange being an element fixed to the extremity of the waveguide, wherein the substrate receives the microstrip technology line, at the extremity of the line.