Low-loss filter and frequency multiplexer

Details Low-loss filter and frequency multiplexer Low-loss filter and frequency multiplexer

2007-11-20

2007-11-20

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S208000, C333S210000, C333S248000

Reexamination Certificate

active

11355894

ABSTRACT:
A waveguide filter with a signal input port at a first end and a signal output port at a second end includes a dielectric core of moldable material where the outer surface of its periphery has a metal layer with nonmetallized openings positioned at opposite ends of the filter to accommodate the input and output ports. The filter's periphery is configured to provide a cascade connection of a plurality of metal-bounded ridge-waveguide sections with interspersed metal-bounded evanescent-mode coupling regions. The filter can be joined through a manifold to realize a frequency-multiplexer, with the manifold containing a cascade connection of electrically short waveguide segments and quasi-lumped waveguide circuit components, such as irises. The filter and multiplexer are amenable to the application of cost-effective injection molding techniques to manufacture the dielectric core.

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