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Electromagnetic properties of dielectric and magnetic composite material for antenna
Electronic Materials Letters ( IF 2.4 ) Pub Date : 2009 , DOI: 10.3365/eml.2009.06.067
Sang-Hoon Park , Won-Ki Ahn , Jun-Sig Kum , Jeong-Keun Ji , Ki-Ho Kim , Won-Mo Seong

Electromagnetic properties of dielectric and magnetic composite materials were studied with various weight fractions and particle sizes of ferrite. The composite materials were prepared through Ni-Zn spinel ferrite and silicon elastomer, and were characterized with regard to permittivity, permeability, loss tangente, and loss tangentu. Those properties of Ni-Zn spinel ferrite were approximately 7.0, 8.4, 0.01 and 0.1 MHz to 150 MHz, respectively; loss tangentu, in particular, increased nearly exponentially with frequency above 80 MHz. Increase of loss tangentu was overcome by composite with polymer. The 40 wt. % loaded composite material changed these properties (approximately 3.8, 2.2, 0.003 and 0.1 at 161 MHz.); therefore, a higher frequency can be used. This material was optimized by particle size distribution. Composite material with smaller particle size is most useful because it shows similar magnetic loss of up to 211 MHz. Magneto-dielectric composite materials are more useful for antenna because they have lower values of complex permittivity and permeability, and higher application frequency. These results are certificated by simulation of antennas.



中文翻译:

天线介电和磁复合材料的电磁性能

研究了不同重量分数和铁氧体粒径的介电和磁性复合材料的电磁性能。通过Ni-Zn尖晶石铁氧体和硅弹性体制备复合材料,并对其介电常数,磁导率,损耗角正切值e和损耗角正切值u进行了表征。Ni-Zn尖晶石铁氧体的那些特性分别约为7.0、8.4、0.01和0.1 MHz至150 MHz; 损耗正切u尤其在频率高于80 MHz时几乎成倍增加。增加损耗角正切的ü通过与聚合物复合来克服。40重量%%负载的复合材料改变了这些特性(在161 MHz时约为3.8、2.2、0.003和0.1);因此,可以使用更高的频率。通过粒度分布对该材料进行了优化。具有较小粒度的复合材料是最有用的,因为它显示出高达211 MHz的相似磁损耗。磁电介质复合材料对天线更有用,因为它们具有较低的复介电常数和磁导率值以及较高的应用频率。这些结果通过天线仿真得到证明。

更新日期:2020-03-03
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