Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – High frequency waveguides – resonators – electrical networks,...
Reexamination Certificate
2008-01-08
2010-06-15
Lee, Benny (Department: 2817)
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
High frequency waveguides, resonators, electrical networks,...
C333S0990MP, C333S174000, C333S175000
Reexamination Certificate
active
07738933
ABSTRACT:
An apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the capacitance in a narrow band filter circuit. A varactor such as a GaAs varactor may be used. Alternatively, a capacitor having a voltage-sensitive dielectric such as SrTiO3may be used. A computer may be connected to the varactor to provide for automated tuning. The voltage-sensitive capacitor may be integral with the resonator element. The invention provides for remote and dynamic tuning of a narrow bandpass filter while located within its sealed cryo-cooled environment.
REFERENCES:
patent: 3067394 (1962-12-01), Zimmerman et al.
patent: 3656162 (1972-04-01), Mee
patent: 4500854 (1985-02-01), Meyer
patent: 4726071 (1988-02-01), Jachowski
patent: 4881050 (1989-11-01), Swanson, Jr.
patent: 5132282 (1992-07-01), Newman et al.
patent: 5227748 (1993-07-01), Sroka
patent: 5231078 (1993-07-01), Riebman et al.
patent: 5361050 (1994-11-01), Einbinder
patent: 5532651 (1996-07-01), Jager et al.
patent: 5541558 (1996-07-01), Weber et al.
patent: 5543764 (1996-08-01), Turunen et al.
patent: 5574413 (1996-11-01), Ruelke
patent: 5616539 (1997-04-01), Hey-Shipton et al.
patent: 5618777 (1997-04-01), Hey-Shipton et al.
patent: 5990766 (1999-11-01), Zhang et al.
patent: 6026311 (2000-02-01), Willemsen Cortes et al.
patent: 6097263 (2000-08-01), Mueller et al.
patent: 6130189 (2000-10-01), Matthaei
patent: 6144263 (2000-11-01), Katsumata et al.
patent: 6178339 (2001-01-01), Sakai et al.
patent: 6438394 (2002-08-01), Zhang et al.
patent: 7023293 (2006-04-01), Mattesson et al.
patent: 7117025 (2006-10-01), Shih et al.
patent: 2001/0030585 (2001-10-01), Jansson et al.
patent: 23 17 375 (1974-10-01), None
patent: 4 009 076 (1991-09-01), None
patent: 0 350 256 (1990-01-01), None
patent: 0 481 607 (1992-04-01), None
patent: 2 577 067 (1986-08-01), None
patent: 57 97 715 (1982-06-01), None
patent: WO 96/12320 (1996-04-01), None
patent: WO 00/35042 (2000-06-01), None
Aitchison, C.S. et al., “Lumped-circuit elements at microwave frequencies” See Fig. 3B,IEEE Transactions on Microwave Theory and Techniques, 19(12):928-937, (Dec. 1971).
Chaloupka, H., “High-Temperature Superconductors—A Material for Miniaturized or High-Performance Microwave Components”,Frequenz, vol. 44, No. 5, pp. 141-144 (May 1990).
Fathy, A., et al., “Superconducting Narrow Band Pass Filters for Advanced Multiplexers”,IEE MTT-S Digest, pp. 1277-1280 (1993).
Fathy, A., et al., “Critical Design Issues in Implementing a YBCO Superconductor X-Band Narrow Bandpass Filter Operating at 77K”,IEEE MTT-S Digestpp. 1329-1332 (1991).
Forse, R., et al., “35 GHz Downconverter Using HTS Films”SPIE, 2156:80-87.
Hammond, R.B. et al., “Designing with superconductors”, See p. 36, left column, line 29-line 35,IEEE Spectrum30(4):34-39 (Apr. 1993) New York US.
Morgan, D., et al., “Lumped Element Filters for Electronic Warfare Systems”,Microwave Journal, pp. 127-136 (Feb. 1986).
Nagai, Y. et al., “Properties of superconductive bandpass filters with thermal switches” See p. 830, left column, line 17-line 30,Applied Physics Letters63(6):830-832 (Aug. 9, 1993) New York, US.
Newman, N. , et al., “High-Temperature Superconducting Microwave Devices: Fundamental Issues in Materials, Physics, and Engineering”,Journal of Superconductivity6(3):119-160 (1993).
Patzelt, T. et al., “High-temperature superconductive lumped-element microwave allpass sections” See p. 1579, left column, line 37-line 42; Fig. 1,Electronics Letters29(17):1578-1580, (Aug. 19, 1993) Stevenage GB.
Swanson, D., “Thin-Film Lumped-Element Microwave Filters”,IEEE MTT-S Digest, pp. 671-674 (1989).
Swanson, Jr., D., et al., “A 10 GHz Thin Film Lumped Element High Temperature Superconductor Filter”,IEEE MTT-S Digest, pp. 1191-1193 (1992).
Zhang, D. et al, “Narrowband lumped-element microstrip filters using capacitively-loaded inductors”,IEEE MTT-S International Microwave Symposium—Digest2(16-20):379-382 (May 1995).
Zhang, D. et al., “Microstrip Filters for Wireless Communications Using High-Temperature Superconducting Thin Films”,Applied Superconductivity5(3):483-496, 1995 Copyright © 1996 Elsevier Science Ltd.
U.S. Appl. No. 08/706,974, filed Sep. 3, 1996, which is a FWC of U.S. Appl. No. 08/323,365, filed Oct. 14, 1994, now abandoned.
Forse, R., et al., “35 GHz Downconverter Using HTS Films”, Proceedings of the SPIE—The International Society for Optical Engineering, vol. 2156 p. 80-87 (1994).
Moeckly Brian H.
Shih Chien-Fu
Zhang Yongming
Conductus, Inc.
Lee Benny
Merchant & Gould P.C.
LandOfFree
Varactor tuning for a narrow band filter having shunt... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Varactor tuning for a narrow band filter having shunt..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Varactor tuning for a narrow band filter having shunt... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4167046