Magnetodielectric Material for VHF Antenna Devices Tunable by a Low DC Magnetic Field

Alexis Chevalier (1, 2) , Hanadi Breiss (1, 2) , Antoine Hoez (2) , Jean-Luc Mattei (1, 2)

1 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
2 Lab-STICC_SMART - Equipe Smart Materials and Related Technologies

This study presents the performance of a magneto-dielectric material (MDM) specially developed to enable the tunability of antenna devices operating in the VHF band. The magnetic susceptibility variation of the MDM material is controlled by a current flowing through the sample which creates a DC magnetic field inside the sample with the same symmetry as the magnetic domains. By changing the magnetization state of the MDM with a low DC magnetic field of 740 A/m, a tunability of 40% can be observed. The MDM tunability at VHF frequencies is also verified by microwave measurements for different magnetization states.

Mots clés: ferrimagnetic materials; tunable materials; magnetization state; magnetic susceptibility; tunable VHF device

Domaines: Sciences de l'ingénieur [physics]

Alexis Chevalier, Hanadi Breiss, Antoine Hoez, Jean-Luc Mattei. Magnetodielectric Material for VHF Antenna Devices Tunable by a Low DC Magnetic Field. INTERMAG ( International Conference on all aspects of Fundamental and Applied Magnetism. ) 2023, May 2023, Sendai, Japan. ⟨10.1109/INTERMAGShortPapers58606.2023.10228215⟩. ⟨hal-04298886⟩