A gigahertz-range electromagnetic wave absorber with wide bandwidth made of hexagonal ferrite
A gigahertz-range electromagnetic wave absorber with wide bandwidth made of hexagonal ferrite
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DOI：
10.1063/1.362284
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发表时间：
1996-04-15
影响因子：
3.2
通讯作者：
Miyata, Y
中科院分区：
文献类型：
--
作者：
Matsumoto, M;Miyata, Y
研究了一种薄的电磁波吸收体，它由六角铁氧体组成，即使在千兆赫范围内也保持高磁导率。通过在垂直于电场的方向上引入自由空间，降低了总介电常数，研究了由六角晶系铁氧体构成的栅格型吸波体在千兆赫兹范围内的带宽展宽。用Ba_3Co_2Fe_（24）O_（41）（Co（2）Z）和Ba-2（Zn_（0.8）Mn？0.2）（2）Fe12O22 [（Zn 0.8Mn 0.2）（2）Y]在自由空间为37%（v/v）、铁氧体厚度约为5 mm时，分别显示出1.8-5 GHz和1.5-4.5 GHz的宽带宽（>15 dB）。当（Zn0.8Mn0.2）（2）Y的厚度为7 mm时，在50%（v/v）的自由空间下实现1.7-9 GHz（C）1996 American Institute of Physics。
A thin electromagnetic wave absorber has been investigated; it is composed of hexagonal ferrite and retains high permeability even in the gigahertz-range. The grid-type wave absorber composed of the hexagonal ferrite was examined to broaden the bandwidth in a gigahertz-range by introducing free space in the direction perpendicular to the electric field, which decreased total permittivity. Absorbers made of Ba3Co2Fe24O41 (Co(2)Z) and Ba-2(Zn0.8Mn?0.2)(2)Fe12O22 [(Zn0.8Mn0.2)(2)Y] showed wide bandwidths of 1.8-5 GHz and 1.5-4.5 GHz (>15 dB), respectively, when the free space was 37% (v/v) and the thickness of the ferrite was about 5 mm. Increasing the free space led to a wider bandwidth: 1.7-9 GHz was achieved with a 50% (v/v) of free space when the thickness of the (Zn0.8Mn0.2)(2)Y was 7 mm. (C) 1996 American Institute of Physics.