Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1998-10-23
2000-02-15
Pascal, Robert
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333175, 333193, H03H 972, H03H 910
Patent
active
06025761&
ABSTRACT:
The invention provides a composite filter, comprising: a laminate formed by laminating a dielectric layer and a conductor layer; a concave portion provided on at least one major surface of said laminate; a plurality of external terminals provided at least on a side surface of said laminate; a cap sealing the concave portion; a surface acoustic wave filter disposed in said concave portion of said laminate; a LC filter provided within said laminate, said LC filter comprising an inductance element and a capacitance element made of said conductor layer respectively; two of said external terminals being input terminals of said surface acoustic wave filter and said LC filter respectively; and other external terminal being a common output terminal of said surface acoustic wave filter and said LC filter.
In the above composite filter, the number of components is reduced and the assembly process can be simplified.
REFERENCES:
patent: 5410742 (1995-04-01), Yajima
patent: 5525942 (1996-06-01), Horii et al.
patent: 5815052 (1998-09-01), Nakajima et al.
European Search Report dated Apr. 14, 1999.
Nakajima Norio
Watanabe Takahiro
Murata Manufacturing Co. Ltd.
Pascal Robert
Summons Barbara
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