Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1987-11-24
1988-11-15
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333219, 333222, 333246, 29600, H01P 1203, H01P 708
Patent
active
047852712
ABSTRACT:
A stripline filter resonator structure is provided which exhibits high Q and results in a filter with low insertion loss. The dielectric consists of two sections of dielectric material. A groove shaped as half an ellipse is formed in each of the sections. The surface of the grooves are covered with electrically conductive material. The two grooves are aligned and filled with adhesive material to hold the two dielectric sections together. An elliptically shaped resonator is thus formed in the center of the dielectric sandwich. Ground plane layers are respectively situated on the outer layers of the dielectric sandwich thus forming a stripline resonator structure. This unique resonator structure results in a more uniform current density around the periphery and thus undesired current bunching is correspondingly decreased.
REFERENCES:
patent: 2810892 (1957-10-01), Blitz
patent: 4609892 (1986-09-01), Higgins, Jr.
"Microwave Filters, Impedance-Matching Networks, and Coupling Structures", Matthaei, et al., Copyright 1980, reprint of edition published by McGraw-Hill Book Co., Inc. in 1964, pp. 172-175, 631.
Kahler Mark P.
McKinley Martin J.
Motorola Inc.
Nussbaum Marvin L.
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