Surface acoustic wave filter

Details Surface acoustic wave filter Surface acoustic wave filter

2008-01-29

2008-01-29

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S133000, C310S31300R

Reissue Patent

active

09925942

ABSTRACT:
A SAW filter includes a first SAW resonator having a pair of terminals and a predetermined resonance frequency (frp), the first SAW resonator being provided in a parallel arm of the SAW filter. A second SAW resonator has a pair of terminals and a predetermined resonance frequency (frs) approximately equal to a predetermined antiresonance frequency of the first SAW resonator (fap). The second SAW resonator is provided in a series arm of the SAW filter. An inductance element is connected in series to the first SAW resonator.

REFERENCES:
patent: 3209178 (1965-09-01), Koneval
patent: 3222622 (1965-12-01), Curran et al.
patent: 3582540 (1971-06-01), Adler et al.
patent: 4044321 (1977-08-01), Vasile
patent: 4166258 (1979-08-01), Tseng
patent: 4295108 (1981-10-01), Ieki
patent: 4320365 (1982-03-01), Black et al.
patent: 4409567 (1983-10-01), Setsune et al.
patent: 4494031 (1985-01-01), Barnes et al.
patent: 4495431 (1985-01-01), Grudkowski
patent: 4625184 (1986-11-01), Niitsuma et al.
patent: 4684841 (1987-08-01), Este et al.
patent: 4694266 (1987-09-01), Wright
patent: 4734664 (1988-03-01), Hikita et al.
patent: 4785270 (1988-11-01), Kinsman
patent: RE32859 (1989-02-01), Marshall et al.
patent: 4803449 (1989-02-01), Hikita et al.
patent: 4939487 (1990-07-01), Yuhara et al.
patent: 4954793 (1990-09-01), Misu et al.
patent: 4978879 (1990-12-01), Satoh et al.
patent: 5015973 (1991-05-01), Kawakami et al.
patent: 5039957 (1991-08-01), Greer et al.
patent: 5059848 (1991-10-01), Mariani
patent: 5115216 (1992-05-01), Hikita et al.
patent: 5162822 (1992-11-01), Wakamori
patent: 5202652 (1993-04-01), Tabuchi et al.
patent: 5231327 (1993-07-01), Ketcham
patent: 5294898 (1994-03-01), Dworsky et al.
patent: 5559481 (1996-09-01), Satoh et al.
patent: RE37375 (2001-09-01), Satoh et al.
patent: 3323612 (1984-01-01), None
patent: 0337703 (1989-10-01), None
patent: 0353073 (1990-01-01), None
patent: 0 401 737 (1990-12-01), None
patent: 0 422 637 (1991-04-01), None
patent: 2283587 (1976-03-01), None
patent: 56-165428 (1955-05-01), None
patent: 3219044 (1977-02-01), None
patent: 52-19044 (1977-02-01), None
patent: 52-48452 (1977-04-01), None
patent: 54-11120 (1977-06-01), None
patent: 53-105156 (1978-09-01), None
patent: 0069012 (1980-03-01), None
patent: 56-165428 (1980-05-01), None
patent: 56-50613 (1981-05-01), None
patent: 56-62416 (1981-05-01), None
patent: 57-002105 (1982-01-01), None
patent: 58-20002 (1983-02-01), None
patent: 6081911 (1983-10-01), None
patent: 59-158117 (1984-09-01), None
patent: 0081910 (1985-05-01), None
patent: 6081910 (1985-05-01), None
patent: 60-114010 (1985-06-01), None
patent: 61-127220 (1986-06-01), None
patent: 63-88910 (1988-04-01), None
patent: 63-132515 (1988-06-01), None
patent: 64-78511 (1989-03-01), None
patent: 1-231417 (1989-09-01), None
patent: 1-260911 (1989-10-01), None
patent: 0290308 (1989-11-01), None
patent: 1-290308 (1989-11-01), None
patent: 2-58915 (1990-02-01), None
patent: 2-69012 (1990-03-01), None
patent: 416014 (1990-05-01), None
patent: 3-220911 (1991-09-01), None
patent: 3-297211 (1991-12-01), None
patent: 4016014 (1992-01-01), None
patent: 4-253412 (1992-09-01), None
patent: 4-253414 (1992-09-01), None
patent: 5167388 (1993-07-01), None
patent: 5-206778 (1993-08-01), None
U.S. Appl. No. 09/158,074, filed Sep. 22, 1998, Yoshio Satoh, et. al., Fujitsu Limited.
U.S. Appl. No. 09/314,943, filed May 20, 1999, Yoshio Satoh, et. al., Fujitsu Limited.
Urabe, S. et al., “SAW Resonator Type Voltage Controlled Oscillator for PLL-FM Modulator,”The Transactions of the Institute of Electronics and Communication Engineers of Japan, vol. J65-B, No. 2, Feb. 1982, pp. 177-184.
Patent Abstract of Japan, Vo. 15, No. 74 (E-1036), Feb. 21, 1991 and JP-A-02 295212 (Fujitsu), Dec. 6, 1990.
The Transactions of the Institute of Electronics and Communication Engineers of Japan, Examination, Group 5, Telecommunicatons, vol. J65-B, No. 2, Feb. 1982, pp. 177-184 (137-280) Feb. 25, 1982, Tokyo.
Minature SAW Antenna Duplexer Used in 800-MHz Portable Telephone for Reverse Frequency Allocation Systems, M. Hikita, et al, Oct. 1989, pp. 31-38.
H. Satoh et al., “A Study of the Design of Acoustic Surface Wave Resonator for UHF Range VCO”, National Convention Record, 1985, The Institute of Electronics and Communication Engineeers of Japan, Part 1, Mar. 27-30, 1985, p. 1-97.
“Acoustic Surface Wave Resonators for Broadband Applications,” J. Vandewege, et al, pp. 663-667, Proceeding of the 8th European Microwave Conference, 1978.
Attentuators, 9-5, Symmetrical T- and H-Attentuators, Electronic Engineering Databook, pp. 237-238 (1963).
Transmission Circuit Networks and Filters, pp. 78-81, 102-113, (1972).
Uniform Recurring Structure Propagation Constant, pp. 103-105, Wire Transmission Science, 1982.
“Distributed Constant Circuit”, pp. 305-307, Basic Studies in Electronic, Telecommunications and Electrical Engineering, 1973.
Electronics Technology Series No. 7, New Piezoelectric Transducer—Resonator—Filter Technology 1996, 8th Edition, Editorial Staff, General Technology Publications, pp. 141-143.
Electric Circuit II, Tadashi Sekiguchi, Ph.D., Tokyo University, Published Nov. 10, 1977.
Handbook of Filter Synthesis, Zverev, 1967, pp. 425-427.
“Active Development of SAW Resonator”,Nikkei Electronics, Nov. 29, 1976, pp. 76 and 80.
“Theory and Design of Filters”,Sangyo-Shuppan, pp. 192-203.
Y. Ebata et al, “SAW Resonator on LiTaO3Substrate and Application Thereof to Oscillator for VTR”,Journal of Institute of Electronics and Communication Engineers, vol. J66-C, No. 1, Jan. 1983, pp. 23-30.
G. Kuraishi, “Microwave Circuits”,Tokyo DenkiDaigaku Shuppan-Kyoku, pp. 199.
O. Ikata et al, “Development of 800 MHz Band SAW Filters Using Weighting for the Number of Finger Pairs,”1990 Ultrasonics Symposium, pp. 83-86.
K. Yamanouchi et al., “Applications for Piezoelectric Leaky Surface Waves,”1990 Ultrasonics Symposium, pp. 11-13.
Patent Abstracts of Japan, vol. 15, No. 506 (E-1148) Dec. 20, 1991 and JP-A 3 220911 (Fujitsu) Sep. 30, 1991.
Yamanouchi et al.,Positive Negative Reflection-Type SAW Reflectors on St-Quartz Using New Fabrication Technique; Japanese Journal of Applied Physics, Supplements; vol. 25, No. 1, 1985; pp. 154-156.
Yamanouchi et al.,5 Ghz Range SAW Filter Fabricated by Electroni Beam Exposure with O-Plasma Ashing Techniques; vol. 25, No. 1, 1985, pp. 154-156.
EP Search Report for related application No. EP 01 12 8369 dated Jun. 20, 2002.
EP Search Report for related application No. EP 01 12 8369 dated Jun. 20, 2002.
Tseng, “SAW Planar Network”, IEEE Ultrasonics Symposium, IEEE, New York, NY, U.S. 1974, pp. 282-285, XP002064986.
J.E. Colin, “Ladder-Type Narrow Bandpass Filters, Using Piezoelectric Crystals and Having Low Frequency Composite Attenuation Poles”,Cables and Transmission, vol. 16, No. 4, pp. 393-366, (Oct. 1962) (Original in French Language, English Language translation provided).
Crystal Filters, Second Quarterly Report, Motorola Inc., pp. 1-52 (Jul. 1, 1960 to Oct. 1, 1960).
Crystal Filters, Third Quarterly Report, Motorola Inc., pp. 1-56 (Oct. 1, 1960 to Jan. 1, 1961).
Crystal Filters, Sixth Quarterly Report, Motorola Inc., pp. 9-10, 29, 38, 51, 53, 55, 58, 60, 62 (Sep. 15, 1961 to Dec. 15, 1961) (excerpts only).
Crystal Filters, Seventh Quarterly Report, Motorola Inc., pp. 41, 42, 44, 45 (Dec. 15, 1961 to Mar. 15, 1962) (excerpts only).
Crystal Filters, Final Report, Motorola Inc., pp. 1-114 (Aug. 15, 1963).
Patent Abstracts of Japan,vol. 15, No. 506 (E-1148), Dec. 20, 1991 & JP-A-03 220911 (Fujitsu), Sep. 30, 1991.

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