Patent ID: 7893789
Filing Date: 2011-02-22
Classification: B22D,H01P

Abstract:
1. A waveguide transition for transitioning from a rectangular waveguide to an elliptical waveguide, at least one of the waveguides being an overmoded waveguide, the transition having a transition passage, said transition passage including: i. a rectangular end having a rectangular cross-section and an elliptical end having an elliptical cross-section, at least one of the rectangular and elliptical ends having a cross-section dimensioned to support overmoded transmission; and ii. internal top, bottom and side walls connecting the rectangular end and the elliptical end; wherein: a. the cross-sectional shape of the top and bottom walls varies continuously between straight at the rectangular end and semi-elliptical at the elliptical end; b. the top and bottom walls are shaped to join smoothly with a passage of rectangular cross-section at the rectangular end and with a passage of elliptical cross-section at the elliptical end; c. the cross-sectional shape of the side walls is straight or convex at all points between the rectangular end and the elliptical end, the height of the side walls diminishing continuously along the length of the transition, being larger at the rectangular end than at the elliptical end; d. the side walls are shaped to join smoothly with a passage of rectangular cross-section at the rectangular end; and e. the transition passage is configured to support a mode filter by further including one or more slots formed in the internal walls.