Title:
BAND-PASS FILTER
Document Type and Number:
WIPO Patent Application WO/1992/004741
Kind Code:
A1
Abstract:
A triplet line is constituted of a resonance element formed by interposing a dielectric member between a pair of ground conductors (6), the length of the line is selected to be about 1/4 of the wavelength, and resonators (5) with one end grounded are combined to constitute a band-pass filter. Each resonator (5) is isolated by a separator (9) to prevent a waveguide mode in the triplet line. A plurality of triplet lines are superposed, and the electromagnetic coupling among the resonators (5) is accomplished by a coupling means (7) provided in the ground conductor and the dielectric member. Resonators at both terminals are coupled to input and output terminals (1, 2).
Inventors:
MIURA TARO (JP)
FUJII TADAO (JP)
NAKAI SHINYA (JP)
FUJII TADAO (JP)
NAKAI SHINYA (JP)
Application Number:
PCT/JP1991/001198
Publication Date:
March 19, 1992
Filing Date:
September 09, 1991
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
H01P1/203; H01P11/00; (IPC1-7): H01P1/203; H01P1/205; H01P11/00
Foreign References:
| JPS58166803A | 1983-10-03 | |||
| JPH02106701U | 1990-08-24 | |||
| US3135935A | 1964-06-02 | |||
| JPS5894202A | 1983-06-04 | |||
| JPS6053302A | 1985-03-27 | |||
| JPS60124104U | 1985-08-21 | |||
| JPH02123790A | 1990-05-11 | |||
| JPS6418301A | 1989-01-23 | |||
| JPS58117701A | 1983-07-13 | |||
| JPS59117802A | 1984-07-07 | |||
| JPS5951606A | 1984-03-26 |
Other References:
Electronic Design, August 30, 1966, PP. 62-63.
MAKOTO MATSUNAGA and others "Electromagnetic Coupling Interlayer Connection of Microstrip Line" Treatise of Autumn National Convention's Lecture by the Institute of Electronics, Information and Communication Engineers (1990), Treatise No. C-59, September 15, 1990 (15. 09. 90), Line 7, upper right column to line 16, lower left column, page 2, Figs. 3, 4 (Family: none).
MAKOTO MATSUNAGA and others "Electromagnetic Coupling Interlayer Connection of Microstrip Line" Treatise of Autumn National Convention's Lecture by the Institute of Electronics, Information and Communication Engineers (1990), Treatise No. C-59, September 15, 1990 (15. 09. 90), Line 7, upper right column to line 16, lower left column, page 2, Figs. 3, 4 (Family: none).
Attorney, Agent or Firm:
Yamamoto, Keiichi (5-12 Nishi-shimbashi 1-chom, Minato-ku Tokyo 105, JP)
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