公开(公告)号：EP1157439A4

公开(公告)日：2003-02-12

申请号：EP99960708

申请日：1999-12-06

Applicant: CIT ALCATEL

Inventor： BROAD GRAHAM ,  MCDONALD NO L ,  WILLIAMS CHARLES

IPC: H01P1/213 ,  H01P1/208 ,  H01P7/06

CPC classification number: H01P1/2138

Abstract: A waveguide directional filter is described for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The filter arrangement comprises an input waveguide (1) and an output waveguide (2). The waveguides are rectangular having broad walls (3) joined by narrow walls (4) whose width/height ratio is approximately 4:1. The two waveguides are connected by at least one direct-coupled cavity resonator (5). Coupling between the cavity and each waveguide is obtained by a respective characteristic aperture (7, 7a) in the form of a rectangle whose four sides have inwardly extending hemicycle sectors (8, 9, 10 and 11).

公开(公告)号：ES2216603T3

公开(公告)日：2004-10-16

申请号：ES99960708

申请日：1999-12-06

Applicant: CIT ALCATEL

Inventor： BROAD GRAHAM ,  MCDONALD NO L ,  WILLIAMS CHARLES

IPC: H01P1/213 ,  H01P1/208 ,  H01P7/06

Abstract: A waveguide directional filter for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The directional filter arrangement includes an input waveguide, an output waveguide and an interconnected cascade assembly of two or more cavity resonators. The input and output waveguides are each aperture-coupled to an end cavity resonator of the cascade assembly. The edges of each aperture incorporate inwardly extending curved protrusions of a characteristic shape. Alternatively or additionally, at least one pair of non-adjacent cavity resonators are coupled by at least one additional coupling element incorporating an external transmission line.

公开(公告)号：AT260513T

公开(公告)日：2004-03-15

申请号：AT99960708

申请日：1999-12-06

Applicant: CIT ALCATEL

Inventor： BROAD GRAHAM ,  MCDONALD NO L ,  WILLIAMS CHARLES

IPC: H01P1/213 ,  H01P1/208 ,  H01P7/06

Abstract: A waveguide directional filter for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The directional filter arrangement includes an input waveguide, an output waveguide and an interconnected cascade assembly of two or more cavity resonators. The input and output waveguides are each aperture-coupled to an end cavity resonator of the cascade assembly. The edges of each aperture incorporate inwardly extending curved protrusions of a characteristic shape. Alternatively or additionally, at least one pair of non-adjacent cavity resonators are coupled by at least one additional coupling element incorporating an external transmission line.