Integrated filter construction

Details Integrated filter construction Integrated filter construction

1997-04-24

2000-02-08

Le, Thanh Cong

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 80, 333 81A, 333204, H04B 144

Patent

active

060236086

ABSTRACT:
A harmonic filter is added to a radio frequency filter comprising at least one transmission line resonator (R1; R2; R3) to filter harmonic multiples of the filter's operating frequency. Coupling to the harmonic filter occurs through matching couplings and transmission lines (7; L1 to L9; L20; L28) in the filter or via the electromagnetic field of said transmission line resonator (R1; R2; R3). The harmonic filter advantageously comprises striplines (L13 to L19; L21 to L27; L29 to L49) manufactured in conjunction with the other stripline structures in the filter.

REFERENCES:
patent: 3728731 (1973-04-01), Choi et al.
patent: 5055809 (1991-10-01), Sagawa et al.
patent: 5153542 (1992-10-01), Tai et al.
patent: 5212815 (1993-05-01), Schumacher
patent: 5255318 (1993-10-01), Gurusami et al.
patent: 5374906 (1994-12-01), Noguchi et al.
patent: 5721520 (1998-02-01), McVeety et al.

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