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US 4,052,683 AGranted
Microwave device
AssigneeU.S. Philips Corporation
InventorsJohannes Hendrik Cornelis van Heuven, Frans Christiaan De Ronde
Life of this patent
Estimating the term…
Abstract
A microstrip waveguide transition where the substrate is arranged in a symmetry plane of waveguide and is situated parallel to the field lines of the electrical field and the longitudinal axis of the waveguide. The asymmetric microstrip conductor structure is coupled, via a symmetrical-asymmetrical transformer, to symmetric band line provided on the substrate. To be conductive for RF energy, the individual conductors of the band line are connected to opposite walls of the waveguide via broadening conductors.
Claims3
A microstrip to waveguide transition, comprising:
- a waveguide structure;
- a microstrip conductor structure including a substrate plate arranged in the longitudinal direction in the plane of symmetry and parallel to the electric field of the wave guide structure, an electrically balanced conductor structure including symmetrical conductor portions arranged on opposite sides of the substrate plate, an electrically unbalanced asymmetrical conductor structure including a conductive base plate and a strip-like conductor arranged on opposite sides of the substrate plate, said strip-like conductor being connected to the juxtaposed conductor portion and being reduced in width with respect thereto, and a symmetric-asymmetric transformer formed by two slots provided in said base plate on both sides of said strip-like conductor and in alignment with the edges of said conductor portions for interconnecting said symmetrical and asymmetrical conductor structures to provide an impedance match there-between and between the symmetrical structure to earth and between assymetrical structure to earth.
Dependencies are inferred from the claim text.