Microwave microstrip filter with U-shaped linear resonators havi

Wave transmission lines and networks – Coupling networks – Wave filters including long line elements

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333205, H01P 1203

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active

045786569

ABSTRACT:
A microwave filter comprising linear resonators makes use of proximity-coupled conductors situated on the first surface of a substrate of dielectric material, whose second surface parallel to the first surface is metallized to form a ground plane, in order to form the resonators. The extremities of each conductor are connected to the earth plane and the center of each conductor is equally connected to the earth plane via at least one capacitor.

REFERENCES:
patent: 3530411 (1970-09-01), Sear
patent: 3621367 (1971-11-01), Rosen et al.
patent: 3745489 (1973-07-01), Criscoe et al.
patent: 4262269 (1981-04-01), Griffin et al.
patent: 4418324 (1983-11-01), Higgins
Gysel, V. H., "Improved Hairpin-Line Filter" 1973 IEEE G-MTT International Microwave Symposium; Boulder, Colorado Jun. 4-6, 1973, pp. 205-207.
Wong, J. S., "Microstrip Tapped-Line Filter Design"; IEEE Transactions on Microwave Theory & Technique; MTT 27, No. 1, Jan. 1979, pp. 44-50.

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