Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1998-04-21
2000-05-02
Ham, Seungsook
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333202, H01P 512, H01P 710
Patent
active
060577452
ABSTRACT:
In a dielectric filter in which electrodes are formed on both principal planes of a dielectric plate while pairs of electrode non-formed portions having substantially the same shape are defined in the electrodes in opposing relation, areas positioned between the pairs of opposing electrode non-formed portions serve as resonance areas, coupling members are provided to be coupled with the resonance areas, and a cavity is provided to define a space surrounding the resonance areas and the coupling members, a signal is prevented from propagating in the parallel plate mode through a waveguide path formed between electrodes formed on both principal planes of the base plate serving as part of a cavity. Electrodes are formed on both principal planes of a dielectric plate (3) with pairs of electrode non-formed portions (4a, 4b, 4c, etc.) defined in the electrodes in opposing relation so that areas positioned between the electrode non-formed portions serve as resonance areas. Microstrip lines (9, 10) are provided on an upper surface of a base plate (6), and an electrode (11) is formed in spaced relation from the microstrip lines (9, 10) by a predetermined distance. Through holes (13) for making electrical conduction between the electrodes formed on both principal planes of the base plate (6) are bored in the base plate in array.
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Patent Abstracts of Japan, vol. 16, No. 381 (E-1248)), Aug. 14, 1992 & JP 04122106 A (Mitsubishi Electric Corp.), Apr. 22, 1992.
Brachat P. et al.: "Dual Polarization Slot-Coupled Printed Antennas Fed by Stripline", IEEE Transactions on Antennas and Propagation, vol. 43, No. 7, Jul. 1 1995, pp. 738-742, XP000513705.
European Search Report dated Jul. 13, 1999, 98106975.0.
"Sub-Millimeter-Wave Band-Pass Filter Using Dielectric Resonator of Planar Circuit Type", C-121, General Meeting of The Institute of Electronics, Information and Communication Engineers, 1996.
Hiratsuka Toshiro
Ida Yutaka
Kanagawa Kiyoshi
Mikami Shigeyuki
Sonoda Tomiya
Ham Seungsook
Murata Manufacturing Co. Ltd.
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