公开(公告)号：US4945324A

公开(公告)日：1990-07-31

申请号：US326430

申请日：1989-03-17

申请人： Yoshikazu Murakami ,  Takahiro Ohgihara ,  Kanako Niikura ,  Yasuyuki Mizunuma ,  Hiroyuki Nakano

发明人： Yoshikazu Murakami ,  Takahiro Ohgihara ,  Kanako Niikura ,  Yasuyuki Mizunuma ,  Hiroyuki Nakano

IPC分类号： H01P1/218

CPC分类号： H01P1/218

摘要： In a thin film ferromagnetic resonance tuned filter is disclosed which comprises a ferrimagnetic thin films, input and output signal transmission lines respectively coupled with the ferrimagnetic thin films, and a magnetic circuit for applying a DC magnetic field to the ferrimagnetic thin films, the present invention expands the variable frequency band by forming extensions each extending from the signal transmission line so that the distance from the coupling point of the signal transmission line coupled with the corresponding ferrimagnetic thin film to the grounded end thereof is 1/10 or above and less than 1/4 the wavelength of a wave transmitted in the transmission lines at the upper limit frequency of a tuning frequency band. Further the deterioration of the isolation characteristics is suppressed by bending the extended portions not to form parallel portions to another transmission line.

摘要翻译： 本发明公开了一种薄膜铁磁谐振调谐滤波器，其包括铁氧体薄膜，分别与铁磁薄膜耦合的输入和输出信号传输线以及用于向铁磁性薄膜施加直流磁场的磁路 通过形成从信号传输线延伸的扩展扩展可变频带，使得从与相应的铁磁性薄膜耦合到其接地端的信号传输线的耦合点的距离为1/10以上且小于1 / 4是在调谐频带的上限频率处在传输线中传输的波的波长。 此外，通过弯曲延伸部分而不形成平行部分到另一传输线来抑制隔离特性的劣化。

公开(公告)号：US4983936A

公开(公告)日：1991-01-08

申请号：US312391

申请日：1989-02-21

申请人： Yoshikazu Murakami ,  Takahiro Ogihara ,  Tsutomu Okamoto ,  Kanako Niikura

发明人： Yoshikazu Murakami ,  Takahiro Ogihara ,  Tsutomu Okamoto ,  Kanako Niikura

IPC分类号： H01P1/218

CPC分类号： H01P1/218

摘要： A ferromagnetic resonance device is disclosed which utilize the perpendicular resonance of ferrimagnetic YIG thin film operable under a D.C. bias magnetic field perpendicular to a major surface of the YIG thin film element. By making the YIG thin film to have a major surface thereof (100) crystal plane of YIG or (111) crystal plane of a substituted YIG having reduced Ku value, lower limit of resonance frequency is extremely lowered. Thus wide range variable filter device can be obtained.

摘要翻译： 公开了一种利用在垂直于YIG薄膜元件的主表面的直流偏置磁场下操作的亚铁磁性YIG薄膜的垂直谐振的铁磁谐振装置。 通过使YIG薄膜具有主要表面（100）具有降低的Ku值的取代YIG的YIG或（111）晶面的晶面，共振频率的下限极大地降低。 因此可以获得宽范围的可变过滤装置。

公开(公告)号：US4887052A

公开(公告)日：1989-12-12

申请号：US276146

申请日：1988-11-25

申请人： Yoshikazu Murakami ,  Yasuyuki Mizunuma ,  Takahiro Ohgihara ,  Hiroyuki Nakano ,  Kanako Niikura ,  Tsutomu Okamoto

发明人： Yoshikazu Murakami ,  Yasuyuki Mizunuma ,  Takahiro Ohgihara ,  Hiroyuki Nakano ,  Kanako Niikura ,  Tsutomu Okamoto

IPC分类号： H03B1/00 ,  H03B5/04 ,  H03B5/18 ,  H03D7/16

CPC分类号： H03B5/1894 ,  H03B2201/0241 ,  H03B5/04 ,  H03D7/161

摘要： A tuned oscillator utilizing a thin film ferromagnetic resonator is disclosed. The oscillator comprises an active element for oscillator and a YIG thin film resonator connected to the active element as a part of feed-back circuit for the active element. The YIG thin film resonator is applied with a bias magnetic field perpendicular to a surfce of a YIG disk which is generated by a permanent magnet for a fixed component and a coil for a variable component for the resonance frequency. The resonance frequency is stabilized by use of a PLL circuit connected to an output of the oscillator and feeding back to the coil. Since the YIG thin film tuned oscillator has a high Q value, high quality communication signal processing can be achieved. The YIG tuned oscillator is used as local oscillator for a transciever.