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Low-loss spinel nanoferrite with matching permeability and permittivity in the ultrahight frequency range

Atul Thakur 1 Alexis Chevalier 1 Jean-Luc Mattei 2 Patrick Queffelec 1
2 Lab-STICC_UBO_MOM_MF
Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance, UBO - Université de Brest
Abstract : Ferrite nanoparticles with a composition of Ni0.5Zn0.3Co0.2Fe2O4 were prepared by a co-precipitation method. The sample obtained after treating at approating conditions had almost equal real permeability and permittivity, of 4.8+j0.15 (loss tangent~0.04) and 4.9+j0.10 (loss tangent~0.018), respectively, over 100MHz to 500 MHz,. This material had a refractive index n of close to 5 and a reduced impedance Z/Z0 of close to 1. These properties make the material useful to the design of miniaturized antennas at VHF-UHF (100MHz-500MHz) bands.
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https://hal.univ-brest.fr/hal-00517482
Contributor : Jean-Luc Mattei <>
Submitted on : Tuesday, September 14, 2010 - 4:34:08 PM
Last modification on : Wednesday, June 24, 2020 - 4:19:28 PM

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  • HAL Id : hal-00517482, version 1

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Atul Thakur, Alexis Chevalier, Jean-Luc Mattei, Patrick Queffelec. Low-loss spinel nanoferrite with matching permeability and permittivity in the ultrahight frequency range. Journal of Applied Physics, American Institute of Physics, 2010, 108, pp.014301. ⟨hal-00517482⟩

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