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    • 5. 发明授权
    • Dielectric filter, duplexer, and communication device
    • 介质滤波器,双工器和通信设备
    • US06236291B1
    • 2001-05-22
    • US09286518
    • 1999-04-06
    • Tomiya SonodaToshiro HiratsukaKiyoshi Kanagawa
    • Tomiya SonodaToshiro HiratsukaKiyoshi Kanagawa
    • H01P120
    • H01P1/20318
    • A dielectric filter includes a case, a substrate having microstrip lines formed thereon, and a dielectric plate having non-electrode parts serving as dielectric resonators. The case includes a supporting part for supporting the lower surface of the dielectric plate and includes a side wall surrounding the side faces of the dielectric plate wherein the supporting part and the side wall are formed in an integral fashion. The substrate is bonded to the case and the dielectric plate is mounted on the supporting part of the case. A metal cover is then placed on the case such that the opening of the case is closed with the cover. In the dielectric filter constructed in the above-described manner, warping of the case for supporting the dielectric plate is suppressed and thus the stress exerted on the dielectric plate is reduced. As a result, the dielectric plate is prevented from being separated from the case and also prevented from having a crack. The above-described structure also allows the dielectric filter to be formed into a small size. The invention also provides a duplexer and a communication device using such a dielectric filter.
    • 介质滤波器包括壳体,其上形成有微带线的衬底和具有用作介电谐振器的非电极部分的电介质板。 壳体包括用于支撑电介质板的下表面的支撑部分,并且包括围绕电介质板的侧面的侧壁,其中支撑部分和侧壁以一体的方式形成。 基板被接合到壳体上,并且电介质板安装在壳体的支撑部分上。 然后将金属盖放置在壳体上,使得壳体的开口用盖封闭。 在以上述方式构成的介质滤波器中,抑制用于支撑电介质板的壳体的翘曲,因此施加在电介质板上的应力减小。 结果,防止电介质板与壳体分离,并且也防止了开裂。 上述结构还允许将介质滤波器形成为小尺寸。 本发明还提供一种使用这种介质滤波器的双工器和通信设备。
    • 8. 发明授权
    • Band-pass filter and communication apparatus
    • 带通滤波器和通信装置
    • US06809615B2
    • 2004-10-26
    • US10118199
    • 2002-04-05
    • Tomiya SonodaToshiro HiratsukaYutaka SasakiKiyoshi KanagawaKeiichi Hirose
    • Tomiya SonodaToshiro HiratsukaYutaka SasakiKiyoshi KanagawaKeiichi Hirose
    • H01P120
    • H01P1/20318
    • A band-pass filter includes electrodes formed on both upper and lower surfaces of a dielectric plate, and a plurality of non-electrode portions on the upper and lower surfaces of the dielectric plate so that the non-electrode portions face each other across the dielectric plate to form resonators in regions confined by the non-electrode portions on the dielectric plate. The resonators other than at least input- and output-stage resonators are n&lgr;2 resonators, where &lgr; denotes one wavelength and n is an integer more than one. The first- and second-stage resonators, and the third- and fourth-stage resonators are magnetically (inductively) coupled, and the second- and third-stage resonators are capacitively or inductively coupled. The band-pass filter therefore provides satisfactory attenuation characteristic from the pass band to the stop band, and can also be compact and lightweight.
    • 带通滤波器包括形成在电介质板的上表面和下表面上的电极和电介质板的上表面和下表面上的多个非电极部分,使得非电极部分在电介质上彼此面对 以在由电介质板上的非电极部分限制的区域中形成谐振器。 除了至少输入和输出级谐振器之外的谐振器是nλ2谐振器,其中λ表示一个波长,n是大于1的整数。 第一级和第二级谐振器以及第三级和第四级谐振器被磁耦合(电感),并且第二级和第三级谐振器是电容性或电感耦合的。 因此,带通滤波器因此提供从通带到阻带的令人满意的衰减特性,并且还可以紧凑和重量轻。