LC-type dielectric filter and duplexer

Details LC-type dielectric filter and duplexer LC-type dielectric filter and duplexer

1994-07-22

1996-06-11

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333204, H01P 1213

Patent

active

055259421

ABSTRACT:
An LC-type dielectric filter includes a plurality of substrate layers which are arranged in a stack and laminated to form a multi-layer substrate. Strip line resonators are provided on some of the substrate layers. The filter has a plurality of terminals, which are connected to resonators. The terminals are also capacitively or inductively coupled to each other. At least one grounding layer is included in the stack for electrically isolating the resonators. Coupling between the resonators can be obtained by forming a plurality of resonators close to one another on the same substrate layer. Further, a duplexer can be made from filters of this type. The duplexer may include a matching circuit and a power amplifier for RF transmission.

REFERENCES:
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4891616 (1990-01-01), Renken et al.
patent: 5227739 (1993-07-01), Mandai et al.
patent: 5237296 (1993-08-01), Mandai et al.
patent: 5300903 (1994-04-01), Okamura et al.

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