Filter having impedance matching circuits

Details Filter having impedance matching circuits Filter having impedance matching circuits

2007-11-16

2011-11-15

Huang, Wen (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S090300, C455S128000, C455S347000, C156S184000, C242S532300, C242S535000, C242S580000, C242S521000, C242S542000

Reexamination Certificate

active

08060156

ABSTRACT:
A filter package is provided with a support structure, a filter device having terminals, impedance matching circuits formed on the support structure and electrically connected to at least some of the terminals of the filter device, and at least one electrical ground structure electrically connected to the impedance matching circuits. Moreover, the filter package has an outer housing to contain the support structure, filter device, impedance matching circuits, and at least one ground structure.

REFERENCES:
patent: 6271579 (2001-08-01), Going et al.
patent: 6417574 (2002-07-01), Misawa et al.
patent: 2004/0124953 (2004-07-01), Nakatani et al.
patent: 2005/0122187 (2005-06-01), Ohashi et al.
patent: 2005/0237130 (2005-10-01), Iwamoto et al.
patent: 2006/0091977 (2006-05-01), Inoue et al.
Canadian Patent Office, International Search Report and Written Opinion for International Application No. PCT/IB2007/004670, 8 pages, Feb. 9, 2009.
Wikipedia definition for “Interdigital transducer,” http://en.wikipedia.org/wiki/Interdigital—transducer, p. 1 (at least as early as Oct. 10, 2007).
Wikipedia definition for “Surface acoustic wave,” http://en.wikipedia.org/wiki/Surface—acoustic—wave, pp. 1-2 (at least as early as Oct. 10, 2007).
Integrated Publishing, Electrical Engineering, “Band-Reject Filter,” http://www.tpub.com/content
eets/14181/css/14181—51.htm, pp. 1-2 (at least as early as Oct. 10, 2007).
http://www.electronics-manufacturers.com/info/rf/microwave-electronics/saw-filter.html, “Saw Filter,” pp. 1-2 (Nov. 17, 2006).

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