RF Power Absorption Enhancement of Magnetic Composites with Conductive Grid

Abstract

To evaluate the electromagnetic power absorption in near field, the magnetic composites with the conductive grids were simulated using the typical permeability frequency profiles. The transmission power absorptions of the magnetic composites on microstrip line were extracted by the 3D FEM simulation program of HFSS. The magnitudes of power absorptions were greatly enhanced up to 98% and broadened the absorbing frequency band over 5 GHz by the insertion of a conductive grid in magnetic composite. The initial frequency of the power absorption can controlled by the change of the ferromagnetic resonance frequencies of the magnetic composite.

Micro Grid Frame of Electroless Deposited Co-P Magnetic Tubes

“…The FSS are widely used as selective filters for microwave and optical signals with specific bands in the spectrum that associated with the lattice period. The use of magnetic components in FSS may provide additional advantages such as the properties controlled by the magnetic field or so-called tunable metamaterials [1]. Regular structures of magnetic elements with the lattice period ranging from the tenth to the several micrometers are also of increasing attention due to their applications in microwave electronics as magnon crystals [2], [3].…”