Filters and duplexers utilizing thin film stacked crystal filter

Details Filters and duplexers utilizing thin film stacked crystal filter Filters and duplexers utilizing thin film stacked crystal filter

1997-05-21

1999-06-08

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333189, 333191, 310322, 310324, 310335, 310349, 310366, H03H 9205, H03H 954, H03H 970

Patent

active

059107561

ABSTRACT:
There is provided a Bulk Acoustic Wave Resonator-Stacked Crystal Filter (BAWR-SCF) filtering circuit or device. The BAWR-SCF circuit comprises a first pair of ports, a second pair of ports, a first lead that is connected between a first and a second one of the first pair of ports, and a second lead that is connected between a first and a second one of the second pair of ports. The BAWR-SCF circuit also comprises a first BAW resonator connected in series in the first lead, and a second BAW resonator connected between the first and second leads. The BAWR-SCF further comprises a Stacked Crystal Filter (SCF) having first and second terminals connected in the first lead between the first BAW resonator and the second one of the first pair of ports. The SCF also has a third terminal that is connected to a node of the second lead. The frequency response of the BAWR-SCF circuit has steeply-sloped upper and lower edges that are similar to those yielded by ladder filters which are constructed primarily of BAW resonators. The upper and lower notches of the BAWR-SCF circuit's frequency response are also similar to those yielded by ladder filters which are constructed primarily of BAW resonators. The BAWR-SCF circuit also provides stopband attenuation characteristics that are similar to those yielded by SCFs. Additional BAW resonators connected in a ladder configuration and/or SCFs may also be provided in the BAWR-SCF circuit.

REFERENCES:
patent: 3173100 (1965-03-01), White
patent: 3189851 (1965-06-01), Fowler
patent: 3293557 (1966-12-01), Denton
patent: 3486046 (1969-12-01), Zalar
patent: 3568108 (1971-03-01), Poirier et al.
patent: 3686579 (1972-08-01), Everett
patent: 3696312 (1972-10-01), Kuhn et al.
patent: 3760471 (1973-09-01), Borner
patent: 3764928 (1973-10-01), Gires et al.
patent: 3916490 (1975-11-01), Sheahan et al.
patent: 3924312 (1975-12-01), Coussot et al.
patent: 4019181 (1977-04-01), Olsson et al.
patent: 4166967 (1979-09-01), Benes et al.
patent: 4320365 (1982-03-01), Black et al.
patent: 4365216 (1982-12-01), Minagawa et al.
patent: 4418299 (1983-11-01), Momosaki
patent: 4456850 (1984-06-01), Inoue et al.
patent: 4502932 (1985-03-01), Kline et al.
patent: 4556812 (1985-12-01), Kline et al.
patent: 4562370 (1985-12-01), Von Dach
patent: 4642508 (1987-02-01), Suzuki et al.
patent: 4897618 (1990-01-01), Svetanoff
patent: 5153476 (1992-10-01), Kosinski
patent: 5162691 (1992-11-01), Mariani et al.
patent: 5166646 (1992-11-01), Avanic et al.
patent: 5185589 (1993-02-01), Krishnaswamy et al.
patent: 5233259 (1993-08-01), Krishnaswamy et al.
patent: 5294898 (1994-03-01), Dworsky et al.
patent: 5332943 (1994-07-01), Bhardwaj
patent: 5373268 (1994-12-01), Dworsky et al.
patent: 5382930 (1995-01-01), Stokes et al.
patent: 5422533 (1995-06-01), Kosinski et al.
patent: 5446306 (1995-08-01), Stokes et al.
patent: 5587620 (1996-12-01), Ruby et al.
patent: 5596239 (1997-01-01), Dydyk
patent: 5629906 (1997-05-01), Sudol et al.
patent: 5646583 (1997-07-01), Seabury et al.
patent: 5692279 (1997-12-01), Mang et al.
"A monolithic piezoelectric amplitude modulator" Bransalov et al, International Journal of Electronics, vol. 47, No. 6, Dec. 1979, pp. 545-553.
"Ultralinear small-angle phase modulator", Symposium on Frequency Control, 1991, pp. 645-648, Forty-Fifth Annual Symposium on Frequency Control, J. Lowe and F.L. Walls.
"Acoustic Bulk Wave Composite Resonators", K. Lakin, Appl. Phys. Lett. 38(3), Feb. 1, 1981, pp. 125-127.
"Systematic Design of Stacked-Crystal Filters by Microwave Network Methods", A. Ballato, IEEE Trans. of Microwave Theory and Techniques, vol., MTT-22, No. 1, Jan., 1974, pp. 14-25.
"Multi-Layered Ultrasonic Transducers Employing Air-Gap Structure", S. Yoshimoto, IEEE Trans. Of Ultrasonic . . . vol. 42, No. 3, May, 1995, pp. 339-343.
"Design of Unapodized Surface Wave Transducers with Spectral Weighting", G. Nudd, IEEE Trans. On Microwave Theory and Techniques, vol. MTT-22, No. 1, Jan., 1974, pp. 14-23.
"Development of Miniature Filters for Wireless Applications", K. Lakin et al., IEEE MTT-S Digest, 1995, pp. 883-886.
"Temperature Compensated High Coupling and High . . . Substrates", T.Shiosaki et al., Ultrasonic Symposium, 1984, pp. 405-410.
"An Air-Gap Type Piezoelectric Composite Thin Film Resonator", H. Satoh et al., IEEE, 1985, pp. 361-366.
"Coplanar Waveguides and Microwave Inductors on Silicon Substrates", A. Reyes, IEEE, 1995, pp. 2016-2021.
"Ultrasonic in Integrated Electronics", W. Newell, Proceedings of the IEEE, May, 1965, pp. 1305-1309.
"Recent Advances in Monolithic Film Resonator Technology" M.M. Driscoll, IEEE, Ultrasonics Symposium, 1986, pp. 365-369.
"Thin Film Bulk Acoustic Wave Filters for GPS", K.M. Lakin, IEEE Ultrasonics Symposium, 1992 pp. 471-476.

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