Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-03-15
2005-03-15
Chang, Daniel D. (Department: 2819)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S206000, C333S219100, C333S132000, C333S202000
Reexamination Certificate
active
06867663
ABSTRACT:
The present invention provides a dielectric duplexer10comprising a receiving filter1and a transmitting filter2which are connected in parallel with an antenna connecting terminal portion17,and both the filters1, 2are integrally assembled into a common dielectric block11.A trap circuit8for suppressing a predetermined frequency band different from the receiving band of the receiving filter1and from the transmission band of the transmitting filter2is integrally assembled into the dielectric block11along with the filters1, 2,and is connected to the antenna connecting terminal portion17.
REFERENCES:
patent: 6307448 (2001-10-01), Atokawa et al.
patent: 6359529 (2002-03-01), Tsunoda et al.
patent: 6677836 (2004-01-01), Uchiyama et al.
patent: 6696905 (2004-02-01), Umeda et al.
Matsushita Naoki
Shimizu Daisuke
Umeda Katsumi
Armstrong Kratz Quintos Hanson & Brooks, LLP
Chang Daniel D.
Sanyo Electric Co,. Ltd.
Sanyo Electronic Components Co., Ltd.
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