A hollow ridge dual channel waveguide that is operable using at least two bands comprising at least a first waveguide and a second waveguide.

摘要

A waveguide apparatus comprising at least a first waveguide and a second waveguide, wherein the first waveguide comprises a ridge waveguide and the second waveguide is at least partially comprised in at least one ridge of the first waveguide. The waveguide apparatus may comprise a hollow ridge waveguide, such as a hollow ridge dual channel waveguide. The first waveguide may comprise a conduit which may be a hollow metal conduit and may be contained within a circular, cylindrical or square envelope. The first waveguide may be adapted to support or propagate a first frequency signal or frequency band and the second waveguide may be adapted to support a second frequency signal or frequency band. The ridged waveguide propagates best for wide ridges with small gaps between the ridges, i.e. a large ridge depth. It may be used as a feed for a microwave horn antenna or as a dual channel microwave transmission filter.