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    • 121. 发明授权
    • Ferromagnetic resonator
    • 铁磁谐振器
    • US4679015A
    • 1987-07-07
    • US844984
    • 1986-03-27
    • Yoshikazu MurakamiSeigo ItoHiromi OkamotoHideo Tanaka
    • Yoshikazu MurakamiSeigo ItoHiromi OkamotoHideo Tanaka
    • H01P5/08H01P1/218H01P7/08
    • H01P1/218
    • A ferromagnetic resonator comprises a nonmagnetic substrate, a ferrimagnetic thin film element formed on a major surface of the nonmagnetic substrate, a strip line for example formed on another major surface of the nonmagnetic substrate and electromagnetically coupled to the ferrimagnetic thin film element, a conductive wall facing the strip line and spaced therefrom a predetermined distance, an end of the strip line being connected by the conductive wall to ground potential and a bias magnetic field source applying a D.C. magnetic field to the ferrimagnetic thin film perpendicular to the major surface thereof. Such an arrangement enables a drastic reduction in the effective dielectric constant of the transmission lines, whereby a filter with a high center frequency of the order of at least ten gigahertz can be achieved despite the short type structure.
    • 铁磁谐振器包括非磁性衬底,形成在非磁性衬底的主表面上的铁磁性薄膜元件,例如形成在非磁性衬底的另一个主表面上并与电磁耦合到铁氧体薄膜元件的导电壁 面对带状线并与之隔开预定距离,带状线的端部由导电壁连接到接地电位,偏置磁场源将垂直于其主表面的铁磁性薄膜施加直流磁场。 这种布置使得能够大大降低传输线的有效介电常数,由此尽管具有短型结构,但是可以实现具有至少十千兆赫数量级的高中心频率的滤波器。