Interdigital bandpass filter

Details Interdigital bandpass filter Interdigital bandpass filter

1993-01-29

1994-10-04

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

29600, H01P 1205

Patent

active

053529960

ABSTRACT:
An interdigital bandpass filter is provided which presents improved performance and is easy to manufacture. The filter is provided with a resonator plate which includes a plurality of resonator elements formed integrally with the resonator plate. For defining a space for accommodating these resonator elements, spacer plates are formed with respective openings. The filter is assembled by stacking the spacer and resonator plates and case plates and securing them to each other. Input/output conductors are coupled to the resonator elements through coaxial line coupling portions which are provided in such a manner that they extend in directions intersecting with the plane of the resonator plate toward the accommodating space.

REFERENCES:
patent: 3525954 (1970-08-01), Rhodes
patent: 4034319 (1977-07-01), Olsson
Munenori Ishii, Seizou Azuma, Toshio Aoki, and Kunio Oi, "Microwave Circuit", pp. 122-125, published on Feb. 28, 1969 by Nikkan Kogyo Simbun-sha.
George L. Matthaei, Leo Young, E. M. T. Jones, "Microwave Filter, Impedance-Matching Networks, and Coupling Structures", 1964, by McGraw-Hill, Inc.
Arne Brejning Dalby, "Interdigital Microstrip Circuit Parameters Using Empirical Formulas and Simplified Model", IEEE Transactions on Microwave theory and Techniques, vol. MTT-27, No. 8, Aug. 1979, pp. 744-752.

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