Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8154634 | Journal of Magnetism and Magnetic Materials | 2016 | 6 Pages |
Abstract
The design of novel microwave absorbers in the Ku band is still challenging. The aim of this work is to report the design of a new Ku absorber based on the combination of three M-hexaferrites with the formula of BaX0.3Y0.3Cr0.3Fe11.1O19 (XY=Co2+Zr4+, Zn2+Ti4+, Mn2+Ce4+), 15Â wt% of each in epoxy matrix. The results indicate the formation of a broadband absorber with a reflection loss (RL) lower than â10Â dB over the whole bandwidth 13.75-18Â GHz. It has three matching frequencies (14.2, 15.3 and 16.8Â GHz) with RL (â29.2, â21.5 and â24.7Â dB, respectively) at a matching thickness of only 2.5Â mm. This is to be compared with the RL of the absorbers based on 45Â wt% of each ferrite alone in epoxy matrix are (â15, â28.8 and â20Â dB, respectively) at matching frequency of (14.15, 13.55 and 16.5Â GHz) and a matching thickness of 4Â mm. This favorable performance resulting from combining the three ferrites within the absorber may be attributed to the enhanced exchange coupling interactions between the three powders of distinct magnetic characteristics.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Seyyed Salman Seyyed Afghahi, Mojtaba Jafarian, Yomen Atassi,