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Control of Non-Linear Permeability of Ferrite Composite Materials in High Frequency - Application to Integrated Ferrite Antenna -

铁氧体复合材料高频非线性磁导率的控制-在集成铁氧体天线中的应用-

基本信息

批准号：
10650692
负责人：
TSUTAOKA Takanori
金额：
$ 2.24万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650692/
关键词：
Ferrite Composite Materials Parametric Amplification Complex Permeability Non-Linear permeability Ferrite Antenna

项目摘要

Investigations for high frequency non-linear permeability of Mn-Zn ferrte, Ni-Zn ferrtei and their composite materials have been carried out. Magnetic field effect to them were also studied.Results are as follows,(1) In Mn-Zn ferrite, resonance type frequency dispersion of complex permeability due to domain wall vibration has been observed in the frequency above seceral 100kHz. Dispersion type change to relaxation in sintered ferrite due to the decrease of magnetic domain walls. In composite materials, permeability dispersion occurs over 100MHz. Dispersion character changes by application of external magnetic field in resonance region.(2) In Ni-Zn ferrite, relaxation type natural resonance has been observed above several MHz in sintered body. In composite materials, frequency dispersion shifts toward up to several GHz due to demagnetizing field in particles.(3) Parametric amplification of electromagnetic wave up to 1GHz was studied by the strip line configuration in which two strip lines were connected by sintered Ni-Zn ferrite. Transmission of electromagnetic wave can be controlled by the external field in resonance region, but amplification could not achieved. Thus new configuration, which combine two resonator connected each other by ferrite, were introduced.

本文研究了锰锌铁氧体、镍锌铁氧体及其复合材料的高频非线性磁导率。结果如下：（1）在Mn-Zn铁氧体中，在100 kHz以上的频率范围内，观察到由于畴壁振动引起的复磁导率的共振型频散。烧结铁氧体中由于磁畴壁的减少，弥散型转变为弛豫型。在复合材料中，磁导率分散发生在100 MHz以上。在谐振区外加磁场会改变色散特性。(2)在Ni-Zn铁氧体中，在烧结体中观察到几MHz以上的弛豫型自然谐振。在复合材料中，由于颗粒中的退磁场，频率色散向高达几GHz的方向移动。(3)研究了用烧结Ni-Zn铁氧体连接两条带状线的带状线结构对1GHz以下电磁波的参量放大。在谐振区，外场可以控制电磁波的透射，但不能实现放大。为此，提出了一种新的结构，即由两个铁氧体连接的谐振器组成的联合收割机。