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    • 3. 发明授权
    • High-frequency filter having increased mechanical strength
    • 高频滤波器具有增加的机械强度
    • US5276412A
    • 1994-01-04
    • US890424
    • 1992-05-29
    • Takehiko YonedaKazuhiro EguchiHiromitsu Taki
    • Takehiko YonedaKazuhiro EguchiHiromitsu Taki
    • C01G25/00C04B35/48H01B3/12H01P1/205H01P7/10H01P11/00H01P1/201
    • H01P1/2053
    • A high-frequency filter of the type having a plurality of resonators open at least at one end thereof, a dielectric board forming an input/output coupling and an interstage coupling, and a case for holding therein the resonators and the dielectric board, wherein the dielectric board is made of a ceramic having a critical stress intensity factor K.sub.1c of not less than 5 MPa.multidot.m.sup.1/2 and a dielectric dissipation factor tan. .delta. of not exceeding 1% in a working frequency band of said high-frequency filter, and wherein electrodes are provided on the dielectric board to form an input/output coupling capacity and an interstage coupling capacity. The high-frequency filter of the foregoing construction has the advantage of an excellent mechanical strength which is capable of withstanding severe mechanical loads such as falling impacts or various stresses.
    • 一种高频滤波器,其具有至少在其一端开放的多个谐振器,形成输入/输出耦合的介质板和级间耦合,以及用于保持谐振器和电介质板的壳体,其中, 电介质板由具有不小于5MPa * m1 / 2的临界应力强度因子K1c和介电损耗因数tan的陶瓷制成。 (delta)在所述高频滤波器的工作频带中不超过1%,并且其中电极设置在电介质板上以形成输入/输出耦合能力和级间耦合能力。 上述结构的高频过滤器具有优异的机械强度的优点,其能够承受严重的机械负载,例如落下的冲击或各种应力。
    • 4. 发明授权
    • Flat type dielectric filter
    • 平面型介质滤波器
    • US5248949A
    • 1993-09-28
    • US850279
    • 1992-03-12
    • Kazuhiro EguchiFumio FukushimaKoji NishimuraKatsumi SasakiTakehiko YonedaHiromitsu Taki
    • Kazuhiro EguchiFumio FukushimaKoji NishimuraKatsumi SasakiTakehiko YonedaHiromitsu Taki
    • H01P1/203H01P1/205H01P1/212H01P5/08H01P11/00
    • H01P1/20345
    • A flat type dielectric filter comprises a substantially U-shaped strip line formed such that each center frequency of spurious output deviates from each odd number frequency times the center frequency of the dielectric filter. That is, it comprises a first portion so curved to form an open loop and two second portions formed to have a larger width than the first portion, each of the second portions being provided to an end of the first portion such that each extends in the opposite direction to the other. In this filter, input/output electrodes confronting ends of U-shaped strip line can be formed on a different layer from the layer where the resonator is formed in order to reduce its size. Reduction of size can be obtained by vertically folding the U-shaped strip line extending horizontally. Terminals of this filter formed on the side surface have a first layer formed on the side surface and a second layer formed on the first layer. The first layer is made of silver, the second layer nickel, or the first layer copper, the second layer solder. This filter has two conducting plates sandwiching dielectric substrates including each resonator, the conducting plate being coated with a epoxy resin or dielectric substance.
    • 扁平型介质滤波器包括基本上U形的带状线,其形成为使得杂散输出的每个中心频率偏离每个奇数频率乘以介质滤波器的中心频率。 也就是说,它包括弯曲形成开环的第一部分和形成为具有比第一部分更大的宽度的两个第二部分,每个第二部分设置在第一部分的端部,使得每个在 与另一方相反。 在该滤波器中,可以在与形成谐振器的层不同的层上形成面对U字形带状线的端部的输入/输出电极,以减小其尺寸。 可以通过垂直折叠水平延伸的U形带状线来获得尺寸的减小。 形成在侧面上的该过滤器的端子具有形成在侧表面上的第一层和形成在第一层上的第二层。 第一层由银制成,第二层为镍,或第一层为铜,第二层为焊料。 该过滤器具有两个导电板,夹持包括每个谐振器的电介质基片,该导电板涂覆有环氧树脂或介电材料。
    • 7. 发明授权
    • Dielectric resonator and process for manufacturing the same
    • 介质谐振器及其制造方法
    • US5210511A
    • 1993-05-11
    • US795149
    • 1991-11-20
    • Yasuhiro IzumiRyoichi MakimotoTakehiko YonedaHiromitsu Taki
    • Yasuhiro IzumiRyoichi MakimotoTakehiko YonedaHiromitsu Taki
    • H01G4/12H01P7/04H01P11/00
    • H01P7/04
    • A dielectric resonator comprising a cylindrical substrate comprised of a dielectric ceramic, a first conductive film comprised of copper, formed on the inner surface, outer surface and one end of said cylindrical substrate, and a second conductive film comprised of at least one solder and tin, formed on said first conductive film. Thus the dielectric resonator of the present invention can be free from oxidation of the copper film when heating is carried out not in an inert gas environment but in the atmosphere. Hence it becomes unnecessary to use various devices for carrying out the heating in an inert gas environment as so required in the conventional cases. This also enables reduction of the number of processing steps, resulting in an improvement in productivity. Moreover, its weatherability can be improved, so that it can promise a long lifetime.
    • 一种介质谐振器,包括由介电陶瓷构成的圆柱形基板,由铜形成的第一导电膜,形成在所述圆柱形基板的内表面,外表面和一端上,第二导电膜由至少一种焊料和锡 ,形成在所述第一导电膜上。 因此,当不是在惰性气体环境中而是在大气中进行加热时,本发明的介质谐振器可以不会氧化铜膜。 因此,在常规情况下,不需要在惰性气体环境中使用各种装置进行加热。 这也能够减少加工步骤的数量,从而提高生产率。 此外,其耐候性可以提高,从而可以承诺长期使用寿命。