WAVEGUIDE QUADRUPLE MODE MICROWAVE FILTER HAVING ZERO TRANSMISSION

摘要

The invention concerns a quadruple mode microwave filter with cavities coupled with a plurality transmission zeros, comprising at least a quadruple mode rectangular parallelepiped cavity, at least two rectangular irises, and two input-output access guides. The tuning and the coupling of the filter are obtained solely by the dimensions of the at least one resonant cavity and of the irises, as well as their mutual arrangement, without any tuning screw or other tuning mechanism. All the surfaces of the cavities and of the irises are either mutually parallel or mutually perpendicular. In a preferred embodiment, the irises are eccentric along two transverse axes. In accordance with an advantageous characteristic, the input mode is the same as the output mode, preferably basic T10 mode.