公开(公告)号：CA2356139C

公开(公告)日：2005-03-29

申请号：CA2356139

申请日：2001-08-28

Applicant: COM DEV LTD

Inventor： YU MING ,  FITZPATRICK WILLIAM ,  SMITH DAVID ,  SIVADAS APU

IPC: H01P1/208 ,  H01P1/20 ,  H01P5/00

Abstract: A microwave filter has a set of irises to couple cavities within the filter. A trifurcated iris comprises a central iris and a pair of peripheral irises. The peripheral irises are configured and oriented to couple a primary mode having a magnetic field in the axial direction of a filter cavity. The central iris is configured and oriented to couple a secondary mode havin g a magnetic field in the azimuthal direction of the filter cavity. The configuration of the trifurcated iris is further oriented to minimize the influence of higher order signals such as the TE21x mode. The peripheral iris are oriented at null points of the primary TE21x mode and th e central iris is also located at a null point. An input and an output iris are configured to recei ve electromagnetic energy in the axial direction of the filter. The input and output irises are oriented to minimize signals in the TE21x secondary mode and any TM modes.

公开(公告)号：CA2356139A1

公开(公告)日：2002-02-28

申请号：CA2356139

申请日：2001-08-28

Applicant: COM DEV LTD

Inventor： SMITH DAVID ,  FITZPATRICK WILLIAM ,  SIVADAS APU ,  YU MING

IPC: H01P1/208 ,  H01P1/20 ,  H01P5/00

Abstract: A microwave filter has a set of irises to couple cavities within the filter. A trifurcated iris comprises a central iris and a pair of peripheral irises. The peripheral irises are configured and oriented to couple a primary mode having a magnetic field in the axial direction of a filter cavity. The central iris is configured and oriented to couple a secondary mode havin g a magnetic field in the azimuthal direction of the filter cavity. The configuration of the trifurcated iris is further oriented to minimize the influence of higher order signals such as the TE21x mode. The peripheral iris are oriented at null points of the primary TE21x mode and th e central iris is also located at a null point. An input and an output iris are configured to recei ve electromagnetic energy in the axial direction of the filter. The input and output irises are oriented to minimize signals in the TE21x secondary mode and any TM modes.