Waveguide filter having coupling screws

摘要

A waveguide filter, comprising a housing defining a passage through which electromagnetic waves can travel and a plurality of adjustable projections extending through the housing into the passage. The passage is absent any fixed protrusions. The plurality of adjustable projection s comprises a set of coupling projections, wherein each pair of adjacent coupling projections in the set of coupling projections defines there between a resonant cavity. Each coupling projection in the set of coupling projections acts as a coupling element for at least one resonant cavity and is adjustable for trimming the coupling of that at least one resonant cavity. The plurality of adjustable projections further comprises a set of tuning projections, wherein a tuning projection from the set of tuning projections is positioned between each pair of adjacent coupling projections and is adjustable for trimming a resonance frequency of an associated resonant cavity.

主权项

1. A waveguide filter, comprising:
a) a set of coupling screws defining a plurality of resonant cavities, wherein adjacent coupling screws in the set of coupling screws define therebetween respective resonant cavities of the plurality of resonant cavities, each coupling screw in the set of coupling screws forming a coupling element for a respective resonant cavity of the plurality of resonant cavities and being adjustable for trimming a coupling of that respective resonant cavity; b) tuning screws positioned between adjacent coupling screws in the set of coupling screws, the tuning screws being adjustable for trimming respective resonance frequencies of the plurality of resonant cavities; and c) a housing defining a passage through which waves can travel, the set of coupling screws and the set of tuning screws extending through the housing into the passage, wherein the passage comprises a substantially rectangular cross-section with first and second wide walls positioned opposite one another and first and second narrow walls positioned opposite one another, wherein at least a first coupling screw of the set of set of coupling screws extends into the passage from the first wide wall of the housing and at least a second coupling screw of the set of coupling screws extends into the passage from the second wide wall of the housing, such that the first coupling screw and the second coupling screw are positioned opposite each other in a facing relationship.