US 5,905,416 AGranted

Die-cast duplexer

AssigneeGlenayre Electronics, Inc.

InventorsHartmut Schmid, Gregory Deane Soderling, Mihai Marcu

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Abstract

A duplexer, usable to interlink a receiver unit, transmitter unit, and an antenna unit of a communication system, has a body that includes cavities and interconnecting apertures. The duplexer further includes resonator covers that cover the cavities and apertures from a bottom side of the body and tuning covers that cover the cavities and apertures from a top side of the body. The resonator covers have integral resonator posts that extend into the cavities when the resonator covers are press-fitted into the body. The tuning covers have threaded openings for the insertion of tuning screws into the cavities and for the insertion of coupling screws into the apertures. The cavities and apertures are tuned to reflect or pass signals of selected frequencies by turning the tuning screws and coupling screws.

Claims8

Dependent claims

A method for manufacturing a duplexer, said method comprising the steps of:

forming by die casting a body having a top side, a bottom side, a plurality of cavities that are open to both the top side and the bottom side of the body and a plurality of interconnecting apertures that are open to either the top side or the bottom side of the body;
forming a resonator cover to cover the cavities and the interconnecting apertures from the bottom side of the body, wherein the resonator cover includes a plurality of integrally formed resonator posts;
forming a tuning cover to cover the cavities and the interconnecting apertures from the top side of the body, wherein the tuning cover includes a plurality of openings for the insertion of tuning screws and coupling screws;
securing said resonator cover into the bottom side of the body such that each resonator post extends into a corresponding cavity when the resonator cover is secured to the bottom side of the body;
and
securing said tuning cover into the top side of the body such that each tuning screw extends into a corresponding cavity and each coupling screw extends into a corresponding aperture when said tuning cover is secured to the top side of said body.

3 more elements

Dependencies are inferred from the claim text.