Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2007-01-30
2007-01-30
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C310S31300R
Reexamination Certificate
active
10484708
ABSTRACT:
An electro-acoustic transducer for a component operating with surface waves, in particular for a surface wave filter, in which, to suppress interfering excitation ensuing in the gap region adjacent an end of a finger, a variation of the gaps is implemented with regard to at least one feature selected from transversal arrangement, size and shape. Due to the slight dimension change of the position of the gap in comparison to the finger length, the desired primary excitation in the transducer remains approximately unchanged, however the interfering excitation is displaced or divided, and made ineffectual.
REFERENCES:
patent: 3699364 (1972-10-01), Gerard
patent: 4472653 (1984-09-01), Yamada
patent: 4684907 (1987-08-01), Zibis
patent: 5136266 (1992-08-01), Niitsuma
patent: 5654680 (1997-08-01), Kwan et al.
patent: 6025763 (2000-02-01), Morimoto
patent: 6271617 (2001-08-01), Yoneda et al.
patent: 6522219 (2003-02-01), Takamiya et al.
patent: 6559739 (2003-05-01), Solie
patent: 0 533 431 (1993-03-01), None
patent: 54-63651 (1979-05-01), None
patent: 59-201512 (1984-11-01), None
patent: 2-170610 (1990-07-01), None
patent: 5-291868 (1993-11-01), None
patent: 9-153753 (1997-06-01), None
Ruppel et al, “SAW Devices for Consumer Communication Applications”,IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, vol. 40, No. 5, Sep. 1993, pp. 438-451.
Hohkawa et al, “Surface Acoustic Wave Filters Without Apodization Loss”,Electronics and Communications in Japan, vol. 62-A, No. 2, 1979, pp. 10-17.
Bauer Thomas
Jakob Michael
Rösler Ulrike
Ruile Werner
EPCOS AG
Schiff & Hardin LLP
Summons Barbara
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