Trimming of waveguide filters
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorPer Ligander
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Abstract
A waveguide filter comprising a matching means for matching the filter. The waveguide filter comprises a housing comprising a cavity having a predetermined first volume. The matching means is in the form of a volume element having a predetermined second volume being matched to the first volume forming a predetermined volume to volume ratio. The matching means is fitted into the cavity in a fixed non-adjustable manner in relationship to the housing. The invention refers also to a method for manufacturing of such a waveguide filter.
Claims19
-18. (canceled)
A waveguide filter comprising:
- a housing having a cavity with a predetermined first volume;
- a matching means in the form of a volume element having a predetermined second volume being matched to the first volume forming a predetermined volume to volume ratio, wherein the matching means is fitted into the cavity in a fixed non-adjustable manner in relationship to the housing.
A method for manufacturing a waveguide filter having a matching means for matching the filter, the method comprises the steps of:
- manufacturing a housing separate from the matching means;
- forming the housing to have a cavity having a predetermined first volume;
- forming a matching means in the form of a volume element having a predetermined second volume being matched to the first volume forming a predetermined volume to volume ratio;
- and
- fitting the matching means into the cavity in a fixed, non-adjustable manner in relationship to the housing.
Dependencies are inferred from the claim text.