Waveguide circulator
AssigneeMicrowave Development Labs. Inc.
InventorGordon Riblet
Life of this patent
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Abstract
A three-port waveguide circulator has three waveguide arms which meet at a common junction. A transformer step in the form of a Y-shaped ridge is disposed symmetrically at the common junction. This waveguide ridge step preferably supports a quarterwave gyromagnetic element. The step may be formed by cutting slots from a standard transformer step to form the ridge. The resulting ridge structure is of reduced size including reduced length compared to a standard uniform transformer section which is advantageous for certain applications such as in constructing a four-port circulator as disclosed herein. A double ridge step may also be used.
Claims12
A three-port waveguide circulator comprising:
- three waveguide arms meeting at a common junction,
- a ridge structure mounted on a wall of the waveguide arms at the common junction and having ridge sections extending along each arm with the ridge sections each being narrower than the wider internal dimension of the waveguide arm to thereby define slots between either side of the ridge section and respective narrow walls of each waveguide arm, each said ridge section having a wall segment facing the narrow wall of each waveguide arm and extending substantially parallel to the narrow wall, and a gyromagnetic element disposed at the junction adapted to be biased by a d.c. magnetic field.
A three-port waveguide circulator comprising:
- three waveguide arms meeting at a common junction,
- a ridge structure mounted on a wall of the waveguide arms at the common junction and having ridge sections extending along each arm with the ridge sections each being narrower than the wider internal dimension of the waveguide arm to thereby define slots between either side of the ridge section and respective narrow walls of each waveguide arm, each said ridge section having sidewalls facing the narrow wall and of each waveguide arm, and an end wall substantially perpendicular to said sidewalls and extending transversely in a direction extending between the narrow walls of the waveguide arm,
- and a gyromagnetic element disposed at the junction adapted to be biased by a d.c. magnetic field.
Dependencies are inferred from the claim text.