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301.发明专利
公开(公告)号：JP2001308601A
公开(公告)日：2001-11-02
申请号：JP2000116209
申请日：2000-04-18
Applicant: MURATA MANUFACTURING CO
Inventor： MIKAMI SHIGEYUKI , HIRATSUKA TOSHIRO , SONODA TOMIYA , KANEKAWA KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a connecting structure for a transmission line which is to be able to prevent deterioration of characteristics in the connecting part, and solve problems such as lowering of reliability of the bonding portion by change of circumstances and changes of connecting characteristics, and further repeat the on- and off states between transmission lines, as well as to provide a high-frequency module with the connecting structure and a communication device using the module. SOLUTION: Electrodes 2a, 2b with slot patterns 3a, 3b and resonator patterns 4a, 4b on the dielectric substrates 1a, 1b are formed. The resonators in the resonator patterns 4a, 4b are arranged at the end of the dielectric substrate and of the transmission line and the slot lines are connected by electromagnetic coupling.
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公开(公告)号：JP2001292002A
公开(公告)日：2001-10-19
申请号：JP2000374240
申请日：2000-12-08
Applicant: MURATA MANUFACTURING CO
Inventor： TSUJIGUCHI TATSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a filter where a resonator part consisting of a dielectric substrate formed with an electrode pattern is reduced in size and its no load Q is enhanced and that is downsized and to provide a duplexer and a communication unit using them. SOLUTION: Center electrodes 2a, 2b respectively having an open end, and a surrounding electrode 3 extended along both sides of them are formed on the upper side of the dielectric substrate 1 and center electrodes 4a, 4b and a surrounding electrode 5 opposed respectively to the center electrodes 2a, 2b and the surrounding electrode 3 are formed on the lower side of the dielectric substrate 1.
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公开(公告)号：JPH11220304A
公开(公告)日：1999-08-10
申请号：JP1958198
申请日：1998-01-30
Applicant: MURATA MANUFACTURING CO
Inventor： TSUJIGUCHI TATSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a small coplanar filter which can be easily designed. SOLUTION: This coplanar filter 1 includes a dielectric substrate 2, the λ/4 coplanar resonators Q1 to Q4 provided on the surface of the substrate 2, the capacitive coupling parts C1 and C2, an inductive coupling part L1 and the input/output terminal parts P1 and P2. The resonators Q1 to Q4 consist of the rectilinear center conductors 3 to 6 which have the electric length equivalent to 1/4 wavelength of resonance frequency respectively and a ground conductor 10 which are placed to interpose the conductors 3 to 6 with a prescribed space secured to each of these conductors. Then the resonators Q1 to Q4 are connected in series to each other by repeating alternately the capacitive coupling caused by the capacity generated by the gaps 11 and 12 of both parts C1 and C2 and the inductive coupling caused by the inductances of the line conductors 14 and 15 of the part L1.
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公开(公告)号：JP2587880B2
公开(公告)日：1997-03-05
申请号：JP41404390
申请日：1990-12-26
Applicant: UBE INDUSTRIES
Inventor： FUJAMA YOSHITADA , ONO TAKAMOTO , TAKASUGI MITSUNORI , HAYASHI SHOTARO
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Patent Agency Ranking
公开(公告)号：JPH08274504A
公开(公告)日：1996-10-18
申请号：JP9432495
申请日：1995-03-28
Applicant: TAIYO YUDEN KK
Inventor： TOMITA TAKASHI
Abstract: PURPOSE: To provide more ideal filter characteristics while miniaturizing and lightening the parts. CONSTITUTION: An LPF 36 is composed of a coil 10 and a capacitor 18 at the input side and with this LPF, unwanted high frequency components are removed. A first stage trap circuit 38 is composed of a capacitor 20 and a resonator 22 on the following stage, and a second stage trap circuit 40 is composed of a capacitor 28 and a resonator 30. At these trap circuits 38 and 40, unwanted low frequency components are respectively removed by the serial resonance of the capacitor 20 and an equivalent inductance 24 and the serial resonance of the capacitor 28 and an equivalent inductance 32. Since the Q of a resonator trap is higher than that of an LC trap, much sharper and more ideal attenuation characteristics can be provided.
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公开(公告)号：JPH0555812A
公开(公告)日：1993-03-05
申请号：JP23546091
申请日：1991-08-21
Applicant: MURATA MANUFACTURING CO
Inventor： NAKAJI HIROYUKI , TSUNODA KIKUO
Abstract: PURPOSE:To obtain an antenna sharing system having high characteristics. CONSTITUTION:The antenna sharing system 10 includes e.g. 16 input terminals 12a to 12p. These input terminals 12a to 12p are connected to respective input terminals of a power combining network 18 through band pass filters(BPFs) 16a to 16p. The BPFs 16a to 16p have frequency characteristics corresponding to 16 channels. Another BPF 20 is connected to the other input terminal of the power combining network. The BPF 20 has a frequency characteristic similar to that of the BPF 16a having a frequency characteristic corresponding to the lowest frequency band channel. The output terminal of the network is connected to an antenna 32 through a TX filter 30.
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公开(公告)号：JPH04248702A
公开(公告)日：1992-09-04
申请号：JP3564591
申请日：1991-02-04
Applicant: UBE INDUSTRIES
Inventor： KITO RYOZO , FUJIYAMA YOSHITADA , ONO TAKAMOTO , TAKASUGI MITSUNORI , HAYASHI SHOTARO
Abstract: PURPOSE:To realize the dielectric high pass filter whose attenuation region is decided to be a resonance frequency of a dielectric resonator by connecting an inductance including positively a floating capacitance of an outer conductor of the coaxial dielectric resonator to ground when the coaxial dielectric resonator is employed to adjust the characteristic obtaining the attenuation characteristic at a desired cut-off frequency thereby adjusting definitely the pass band for the part. CONSTITUTION:A dielectric substance (5) is filled between an inner conductor (4) and an outer conductor (3) to form a coaxial dielectric resonator (1A...) and plural sets of the resonators are arranged or the plural sets are integrated by using a common outer conductor to form the dielectric filter, then the outer conductor (3) is connected to ground via a required inductance (8A...) so as to decide a pass region of the dielectric filter in the said coaxial dielectric resonator (1A...) where the resonance frequency is provided to a desired frequency band and the resonance frequency is used as the attenuation frequency.
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