Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1987-02-25
1988-05-17
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333202, 333222, 333245, H01P 1205, H01P 704
Patent
active
047453796
ABSTRACT:
An inhomogeneous ceramic dielectric microwave RF TEM resonator filter having a plurality of unplated notches in the ceramic for enhancing direct inter-resonator coupling. The filter is implemented without the lumped coupling capacitors which are typically associated with each resonator of a TEM resonator filter. Furthermore, the launching resonators which are typically used to couple in and out of the filter are eliminated by using coaxial probe capacitors inserted in each of the end resonators. The non-end resonators can be made to look as long as the end resonators, with probes therein, by including a conductor pad disposed upon the block top surface and connecting the internal plating of the non-end resonators.
REFERENCES:
patent: 4179673 (1979-12-01), Nishikawa et al.
patent: 4268809 (1981-05-01), Makimoto et al.
patent: 4410868 (1983-10-01), Meguro et al.
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4523162 (1985-06-01), Johnson
patent: 4546333 (1985-10-01), Fukasawa et al.
patent: 4673902 (1987-06-01), Takedal et al.
"Comb-line Bandpass Filters of Narrow or Moderate Bandwidth", by George L. Matthaei, Aug. 1963, Microwave Journal, pp. 82-91.
"Analysis and Composition of a New Microwave Filter Configuration with Inhomogeneous Dielectric Medium", by A. Fukasawa, IEEE Trans. on Microwave Theory and Techniques, vol. MTT-30, No. 9, Sep. 1982, pp. 1367-1375.
"Cermaic-Filled Resonator Cuts Costs of Radio-Telephone Filters", by T. Uwano, Jul. 14, 1983, Electronics, vol. 56:129-131.
Microwave Filters Impedance Matching Networks and Coupling Structures, by G. L. Matthaei et al., McGraw Hill Book Co., N.Y., N.Y., 1964, Sections 8.13 and 8.14.
Microwave Filters Impedance Matching Networks and Coupling Structures, by G. L. Matthaei et al., McGraw Hill Book Co., N.Y., N.Y., 1964, Sections 12.01-12.07.
Cozzie James C.
West James B.
Hamann H. Fredrick
Murrah M. Lee
Nussbaum Marvin L.
Rockwell International Corp.
Williams Gregory G.
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