Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1997-06-27
1999-11-23
Ham, Seungsook
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333235, H01P 1203
Patent
active
059907665
ABSTRACT:
The tunable filters of the present invention incorporate tunable dielectric materials (e.g., bulk and thin film ferroelectric and paraelectric materials) in contact with segments of resonators that are at an RF voltage maximum to alter the pass band or stop band characteristic of an RF signal outputted by the filter. The biasing circuitry in contact with the tunable dielectric material can include components for inhibiting or retarding the coupling of RF energy to the biasing circuit.
REFERENCES:
patent: 3365400 (1968-01-01), Pulvari
patent: 3569795 (1971-03-01), Gikow
patent: 3784937 (1974-01-01), Jackson et al.
patent: 4161766 (1979-07-01), Castleberry et al.
patent: 4837536 (1989-06-01), Honjo
patent: 5070241 (1991-12-01), Jack
patent: 5105200 (1992-04-01), Koepf
patent: 5142437 (1992-08-01), Kammerdiner et al.
patent: 5146299 (1992-09-01), Lampe et al.
patent: 5187460 (1993-02-01), Forterre et al.
patent: 5192871 (1993-03-01), Ramakrishnan et al.
patent: 5208213 (1993-05-01), Ruby
patent: 5212463 (1993-05-01), Babbitt et al.
patent: 5307033 (1994-04-01), Koscica et al.
patent: 5309166 (1994-05-01), Collier et al.
patent: 5312790 (1994-05-01), Sengupta et al.
patent: 5358926 (1994-10-01), Olson et al.
patent: 5409889 (1995-04-01), Das
patent: 5459123 (1995-10-01), Das
patent: 5472935 (1995-12-01), Yadrofski et al.
patent: 5496795 (1996-03-01), Das
patent: 5496796 (1996-03-01), Das
patent: 5523283 (1996-06-01), Simon et al.
patent: 5538941 (1996-07-01), Findikoglu et al.
patent: 5589845 (1996-12-01), Yandrofski et al.
patent: 5617104 (1997-04-01), Das
patent: 5640042 (1997-06-01), Koscica et al.
Beall, James A., Ronald H. Ono, David Galt and John C. Price; Tunable High Temperature Superconductor Microstrip Resonators; To appear in the 1993 IEEE MTT-S International Microwave Symposium Digest, 1993.
Vendik, O.G., L.T. Ter-Martirosyan, A.I. Dedyk, S.F. Karmanenko and R.A. Chakalov; High-T.sub.c Superconductivity: New Applications of Ferroelectrics at Microwave Frequencies; Ferroelectrics, 1993, vol. 144, pp. 33-43.
Barnes, Frank S., John Price, Allen Hermann, Zhihang Zhang, Huey-Daw Wu, David Galt, Ali Naziripour; Some Microwave Applications of BaSrTiO.sub.3 and High Temperature Superconductors;Integrated Ferroelectrics; 1995; vol. 8, pp. 171-184.
Edited by M.J. Howes and D.V. Morgan; Variable Impedance Devices;1978; pp. 270-275.
Mortenson, Kenneth E.; Variable Capacitance Diodes; 1990; pp. 44-48.
Feynman, Richard P., Robert B. Leighton, Matthew Sands; The Feynman Lectures on Physics; Addison-Wesley Publishing Company; pp. 23-2 -23-6, 1998.
Scott, J.F., David Galt, John C. Price, James A. Beall, Ronald H. Ono, Carlos A. Paz de Araujo and L.D. McMillan; A Model of Voltage-Dependent Dielectric Losses for Ferroelectric MMIC Devices;; Integrated Ferroelectrics; 1995; vol. 6; pp. 189-203.
Vendik, Orest, Igor Mironenko and Leon Ter-Martirosyan; Superconductors Spur Application of Ferroelectric Films; Microwaves and RF; 1994; pp. 67-70.
Jeck, M., S. Kolesov, A. Kozyrev, T. Samoilova, and O.Vendik; Investigation of Electrical Nonlinearity of HTS Thin Films as Applied to Realization of a Microwave IC Mixer; Journal of Superconductivity; vol. 8, No. 6, 1995; pp. 705-714.
Galt, David, John C. Price; James A. Beall, Ronald H. Ono; Characterization of a Tunable Thin Film Microwave Yba.sub.2 Cu.sub.3 O.sub.7-X /SrTio.sub.3 Coplanar Capacitor; Appl. Phys. Lett 63 (22); Nov. 29, 1993; pp. 3078-3080.
Galt, David, John C. Price; James A. Beall, Todd E. Harvey; Ferroelectric Thin Film Characterization Using Superconducting Microstrip Resonators; IEEE Transactions on Applied Superconductivity; vol. 5, No. 2; Jun. 1995; pp. 2575-2578.
Wu, Huey-Daw, Frank S. Barnes, David Galt, John Price, James A. Beall; Dielectric Properties of Thin Film SrTiO.sub.3 Grown on LaA1O.sub.3 With Yba.sub.2 CU.sub.3 O.sub.7-X Electrodes; To appear in the proceeding sof the Jan. 1994 SPIE-Int. Soc. Opt. Eng. Conference on High-T.sub.c Microwave Superconductors and Applications, SPIE Proceedings vol. 2156, 1994.
Varadan, V.K., D.K. Ghodgaonkar and V.V. Varadan; Ceramic Phase Shifters for Electronically Steerable Antenna Systems; Microwave Journal; Jan. 1992; pp. 118-125.
Walkenhorst, A., C. Doughty, X.X. Xi, S.N. Mao, Q. Li, T. Venkatesan and R. Ramesh; Dielectric Properties of SrTiO.sub.3 Thin Films Used in High T.sub.c Superconducting Field-Effect Devices;Appl. Phys. Lett 60 (14), Apr. 6, 1992; pp. 1744-1746.
Takemoto-Kobayashi, June H., Charles M. Jackson, Emery B. Gillory, Claire Pettiette-Hall, John F. Burch; Monolithic High-Tc Superconducing Phase Shifter at 10 GHz; IEEE MTT-S Digest; 1992; pp. 469-472.
Takemoto, June H., Charles M. Jackson, Roger Hu, John F. Burch, Kenneth P. Daly and Randy W. Simon; Microstrip Resonators and Filters Using High-TC Superconducting Thin Films on LaA10.sub.3 ; IEEE; 1991; pp. 2549-2552.
Ramesh, R., A. Inam, W.K. Chan, F. Tillerot, B. Wilkens, C.C. Chang, T. Sands, J.M. Tarasco and V.G. Keramidas; Ferroelectric PbZr.sub.0.2 Ti.sub.0.8 O.sub.3 Thin Films on Epitaxial Y-Ba-Cu-O; Appl. Phys. Lett.; vol. 59, No. 27, Dec. 30, 1991; pp. 3542-3544.
Track; E.K., Z-Y Shen, H. Dang, M. Radparvar and S.M. Faris; Investigation of an Electronically Tuned 100 Ghz Superconducting Phase Shifter; IEEE; 1991.
Ryan, Paul A.; High-Temperature Superconductivity for EW and Microwave Systems; Journal of Electronic Defense; May 1990; pp. 55-59.
Dinger, Robert J., Donald R. Bowling, Anna M. Martin and John Talvacchio; Radiation Efficiency Measurements of a Thin-Film Y-Ba-Cu-O Superconducting Half-Loop Antenna at 500 Mhz; IEEE MTT-S Digest; 1991; pp. 1243-1246.
Dinger, Robert J.; Donald R. Bowling and Anna M. Martin; A Survey of Possible Passive Antenna Applications of High-Temperture Superconductors; IEEE Transactions on Microwave Theory and Techniques; vol. 39, No. 9; Sep. 1991; pp. 1498-15-7.
McAvoy, B.R., G.R. Wagner, J.D. Adam, J. Talvacchio and M. Driscoll; Superconducting Stripline Resonator Performance; Proc. 1988 Applied Superconductivity Conf. (IEEE Trans. Magn. MAG-25, 1989).
Considine, Douglas M. (Editor), Glenn D. Considine (Managing Editor); Van Nostrand's Scientific Encyclopedia, Sixth Edition, vol. 1; Van Nostrand Reinhold Company; Superconductors; pp. 2725-2727, 1998.
Skolnik, Merrill I. (Editor in Chief); Radar Handbook; Second Edition; McGraw-Hill Publishing Company; Chapter 7; Cheston, Theodore C. And Joe Frank; Phased Array Radar Antennas7.1, 7.6-7.8, 1990.
Howes, M.J. and D.V. Morgan (edited); Variable Impedance Devices; John Wiley & Sons; 1978; pp. 270-275.
Jackson, Charles M., June H. Kobayashi, Emery B. Guillory, Claire Pettiette-Hall, and John F. Burch; Monolithic HTS Microwave Phase Shifter and Other Devices; Journal of Superconductivity; vol. 5, No. 4, 1992; pp. 419-424.
Scott, J.F., M. Azuma, E. Fujii, T. Otsuki, G. Kano, M.C. Scott, C.A. Paz de Araujo, L.D. McMillan & T. Roberts; Microstructure-Induced Schottky Barrier Effects in Barium Strontium Titanate (BST) Thin Films for 16 and 64 MBIT Dram Cells; IEEE; pp. 356-359, 1998.
Das, S.N.; Ferroelectrics for Time Delay Steering of an Array; Ferroelectrics; 1973; vol. 5, pp. 253-257.
Jackson, Charles M., June H. Kobayashi; Alfred Lee; Claire Pettiette-Hall, John F. Burch, Roger Hu, Rick Hilton, and Jim McDade; Novel Monolithic Phase Shifter Combining Ferroelectrics and High Temperature Superconductors; Microwave and Optical Technology Letters; vol. 5, No. 14; Dec. 20, 1992; pp. 722-726.
Jackson, C.M., J.H. Kobayashi, D. Durand and A.H. Silver; A High Temperature Superconductor Phase Shifter; Microwave Journal; Dec. 1992; pp. 72-78.
Schumacher, M. G.W. Dietz and R. Waser; Dielectric Relaxation of Perovskite-Type Oxide Thin Films: 1998.
Weiser, Jr. Attila
Zhang Zhihang
Ham Seungsook
Superconducting Core Technologies, Inc.
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