Transversal filter

Details Transversal filter Transversal filter

2010-07-27

2011-11-01

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S195000

Reexamination Certificate

active

08049582

ABSTRACT:
The filter includes at least one acoustic track formed on a piezoelectric substrate. At least one SAW input transducer and at least one SAW output transducer are arranged in each track. Each track has a RSPUDT structure and thus a distributed excitation. The excitation function includes sources arranged in a main lobe and a tail function including at least one tail lobe. A fine and precise approximation to the desired continuous excitation function is obtained by decreasing the excitation strength in the tail function by a factor of at least 2.

REFERENCES:
patent: 3894251 (1975-07-01), Shibayama et al.
patent: 4143340 (1979-03-01), Hunsinger
patent: 5296824 (1994-03-01), Cho et al.
patent: 6462633 (2002-10-01), Ichikawa
patent: 6476691 (2002-11-01), Tsuzuki et al.
patent: 6525629 (2003-02-01), Matsuda et al.
patent: 6842090 (2005-01-01), Ichikawa et al.
patent: 7304553 (2007-12-01), Bauer et al.
patent: 2003/0122449 (2003-07-01), Bergmann
patent: 1 655 837 (2006-05-01), None
patent: WO 97/10646 (1997-03-01), None
patent: WO 2009/115258 (2009-09-01), None
Hodé, J.M., et al., “SPUDT-Based Filters: Design Principles and Optimization,” 1995 IEEE Ultrasonics Symposium, 12 pages.

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