Strict proof and applicable range of the quarter-wavelength model for microwave absorbers
- 25 February 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 53 (26), 265004
- https://doi.org/10.1088/1361-6463/ab79da
Abstract
In the research and applications on microwave absorption materials and electromagnetic absorbers, the quarter-wavelength model is widely used in describing the dependence of the reflection loss (RL) peak frequency on electromagnetic parameters and thickness, and in the preparation and design of microwave absorption materials. However, the strict proof about this model based on transmission line theory is lacking. Moreover, a deviation between the absorption peaks obtained from the RL results and those from the quarter-wavelength model is observed in some materials, for which universal and reasonable theoretical explanation is also lacking. Hence, in this work, we derived strict proof of the quarter-wavelength model based on the transmission line theory, and developed a revised equation for this model to explain the abovementioned deviation. The revised equation could well fit the deviations observed in our experimental results. Combining with experimental results, we also discussed the applicable ranges for the quarter-wavelength model and the revised equation. Moreover, the results of this work showed that the appropriate value of phase angle is effective to reduce the absorber thickness.Keywords
This publication has 32 references indexed in Scilit:
- Reflection loss mechanism of single layer absorber for flake-shaped carbonyl-iron particle compositeJournal of Applied Physics, 2012
- A review and analysis of microwave absorption in polymer composites filled with carbonaceous particlesJournal of Applied Physics, 2012
- Investigation on peak frequency of the microwave absorption for carbonyl iron/epoxy resin compositeJournal of Magnetism and Magnetic Materials, 2011
- Magnetic and microwave absorbing properties of magnetite–thermoplastic natural rubber nanocompositesJournal of Magnetism and Magnetic Materials, 2010
- Fabrication and microwave absorbing properties of Ni–Zn spinel ferritesJournal of Alloys and Compounds, 2009
- Investigation of the microwave-absorbing properties of Fe-filled carbon nanotubesMaterials Letters, 2007
- Electromagnetic and absorption properties of some microwave absorbersJournal of Applied Physics, 2002
- Fabrications of broad-band RF-absorber composed of planar hexagonal ferritesIEEE Transactions on Magnetics, 1999
- Complex permeability and permittivity and microwave absorption of ferrite-rubber composite at X-band frequenciesIEEE Transactions on Magnetics, 1991
- Application of Ferrite to Electromagnetic Wave Absorber and its CharacteristicsIEEE Transactions on Microwave Theory and Techniques, 1971