Antenna duplexer

Details Antenna duplexer Antenna duplexer

2011-01-18

2011-01-18

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000

Reexamination Certificate

active

07872548

ABSTRACT:
An antenna duplexer is provided, which can be built with a smaller size and lower height than ever without compromising out-of-band attenuation characteristic and isolation characteristic between a transmit terminal and a receive terminal. The antenna duplexer includes a transmit filter provided between an antenna terminal and the transmit terminal, and a receive filter provided between the antenna terminal and the receive terminal. The filters are enclosed by a package, in which a ground pattern for the receive filter is separated from other ground patterns.

REFERENCES:
patent: 7053731 (2006-05-01), Iwamoto et al.
patent: 7135944 (2006-11-01), Iwamoto et al.
patent: 7298231 (2007-11-01), Ikuta et al.
patent: 7573354 (2009-08-01), Nishihara et al.
patent: 3778902 (2006-03-01), None
patent: 2007074698 (2007-03-01), None

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