Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2011-06-21
2011-06-21
Jones, Stephen E (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S203000
Reexamination Certificate
active
07965158
ABSTRACT:
A microstrip filter having a plurality of hairpin microstrip resonators each having two substantially rectangular legs connected at one end and generally configured in a “U” shape. The microstrip filter may comprise a first of the plural resonators operatively connected to a first feed point, a second of the plural resonators operatively connected to a second feed point, and a third of the plural resonators operatively connected between the first and second resonators where an end portion of one of the legs of one of the resonators is tapered so that a thickness of the one leg is greater at one end of the one leg than at another end of the one leg.
REFERENCES:
patent: 3754198 (1973-08-01), Anghel
patent: 4578656 (1986-03-01), Lacour et al.
patent: 4992759 (1991-02-01), Giraudeau et al.
patent: 5055809 (1991-10-01), Sagawa et al.
patent: 5105173 (1992-04-01), Itou
patent: 5525945 (1996-06-01), Chiappetta et al.
patent: 5616538 (1997-04-01), Hey-Shipton et al.
patent: 5888942 (1999-03-01), Matthaei
patent: 6130189 (2000-10-01), Matthaei
patent: 6483404 (2002-11-01), Ammar et al.
patent: 6630875 (2003-10-01), Mizoguchi et al.
patent: 2003/0016099 (2003-01-01), Manseau et al.
patent: 2003/0222732 (2003-12-01), Matthaei
patent: 2004/0246071 (2004-12-01), Rottmoser et al.
patent: 4029665 (1992-03-01), None
Willemsen, B., et al., “Microwave intermodulation in thin film high-Tc superconducting microstrip resonators: Experiment and theory,” Appl. Phys. Lett. 71 (26), Dec. 29, 1997, pp. 3898-3900.
Sagawa, et al., “Miniaturized Hairpin Resonator Filters and Their Application to Receiver Front-End MIC's,” IEEE Transactions on Microwave Theory and Techniques, vol. 37, No. 12, Dec. 1989, pp. 1991-1997.
F.J. Winter, “High Dielectric Constant Strip Line Band Pass Filters,” IEEE Transactions on Microwave Theory and Techniques, vol. 39, No. 12, Dec. 1991, pp. 2182-2181.
S.B. Cohn, “Parallel-Coupled Transmission Line Resonator Filters,” IRE Trans. PGMTT, vol. MTT-6, Apr. 1958, pp. 223-231.
Office Action mailed Jul. 28, 2008 from U.S. Appl. No. 11/600,167, filed Nov. 16, 2006.
Office Action mailed Nov. 3, 2008 from U.S. Appl. No. 11/600,167, filed Nov. 16, 2006.
PCT International Search Report and Written Opinion mailed Sep. 18, 2008 for International Application No. PCT/US2007/084580 filed Nov. 13, 2007.
Office Action mailed Aug. 5, 2009 from U.S. Appl. No. 11/600,167, filed Nov. 16, 2006.
Notice of Allowance mailed Nov. 9, 2009 from U.S. Appl. No. 11/600,167, filed Nov. 16, 2006.
Wong, “Microstrip Tapped-Line Filter Design,” IEEE Trans. on Microwave & Tech, vol. MTT-27, No. 1, Jan. 1979, pp. 44-50.
Harris Stratex Networks, Inc.
Jones Stephen E
Sheppard Mullin Richter & Hampton LLP
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