Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1987-02-25
1988-07-12
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333202, 333204, 333222, H01P 1205, H01P 704
Patent
active
047572884
ABSTRACT:
A ceramic TEM resonator bandstop filter is disclosed wherein the direct inter-resonator coupling is retarded by a plurality of shorting holes which are positioned between the resonators and extend from the top surface to the bottom surface of said ceramic filters. Furthermore, there is disclosed a transverse electrical connector which electrically connects the shorting holes with the opposite sides of the typical metalization found on ceramic TEM resonator filters. Furthermore, there is disclosed a method of making a capacitor for each resonator with the bottom capacitor pad being formed directly upon the top surface of the ceramic of the filter while the top capacitor pad is formed upon the top surface of a circuit board which is placed above the top surface of the filter.
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
"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.
"Ceramic-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., NY, NY, 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., NY, NY, 1964, Sections 12.01-12.07.
Hamann H. Fredrick
Murrah M. Lee
Nussbaum Marvin L.
Rockwell International Corporation
Williams Gregory G.
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