MICROWAVE CIRCULATOR WITH DEFORMABLE MEMBRANE

摘要

A circulator comprises a housing (10) in two halves (12, 11) with a ferrite (18) and associated magnet (16) in a central portion of a first one of the halves (12), the second housing-half (11) above the ferrite having a membran e (32) which is deformable by operation of an adjusting means (33) upon the membrane, so as to adjust the size of an airgap (26) between the membrane an d the ferrite. The membrane is preferably the residual portion of the second housing-half following a milling operation to provide a recess (31 ), the recess accommodating the adjusting means in the form of, e.g., a screw. To further enhance predictability of the performance characteristics of the circulator, the ferrite is seated in a hollow (36) formed in the first housi ng- half and the securing of the ferrite to the first housing-half is by way of an adhesive applied between a lateral face (37) of the ferrite and a corresponding lateral face of the hollow.