Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1998-05-07
2000-05-02
Ham, Seungsook
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333206, H01P 1213
Patent
active
060577460
ABSTRACT:
A dielectric duplexer unit which is compact and can be manufactured in a simple way, and includes a dielectric duplexer having a plurality of resonators and a circuit laminate formed by sequentially laying a plurality of dielectric sheets on the open-circuit end surface of the dielectric duplexer, the circuit laminate having coupling circuits which are connected to resonators of an intended resonator circuit of the dielectric duplexer, the assembly of the dielectric duplexer and the circuit laminate being mounted on a substrate and housed in a metal casing to produce a compact unit having a neat profile. As a result a down sized filter circuit is produced to allow the use of a small substrate so that the entire unit is also down sized, and the unit can use a simple wiring arrangement and have an increased mechanical strength and an improved impact resistance.
REFERENCES:
patent: 4673902 (1987-06-01), Takeda et al.
patent: 5686873 (1997-11-01), Tada et al.
patent: 5789998 (1998-08-01), Kim et al.
Ham Seungsook
NGK Spark Plug Co. Ltd.
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