Patent ID: 6353373
Filing Date: 2002-03-05
Classification: H01P

Abstract:
An improved dielectric loaded cavity filter having a housing and a cover defining an exterior and an interior; said housing interior defining at least two adjacent cavities having respective dielectric resonators mounted therein; said adjacent cavities being separated by a transverse partition defining a coupling window in said housing; said coupling window having two spaced opposing sidewalls confronting each other, each of said sidewalls defining an inwardly extending shoulder intermediate its length, and a conductive coupling strip secured to the shoulder of one sidewall and extending across said coupling window and over the shoulder of the other sidewall; said filter further comprising a tuning screw having an outer free end accessible from the exterior of said housing and cover, and an internal end disposed adjacent said coupling strip; whereby said tuning screw is rotated relative to said housing, the internal end of said screw moves toward or away from said coupling strip in a direction perpendicular to said cover for tuning without requiring access to said coupling strip; wherein the sidewall shoulders are vertically offset from each other, and said coupling strip is spaced away from the shoulder of said other sidewall.