Title :
Shielding effectiveness of planar negative-permeability screens
Author :
Lovat, Giampiero ; Celozzi, Salvatore
Author_Institution :
Dept. of Electr. Eng., La Sapienza Univ. of Rome, Rome
Abstract :
A planar screen made of a periodic array of small resonant particles showing a strong magnetic resonance is studied in detail. Two types of inclusions are considered: the double split-ring resonator (SRR) and the spiral resonator (SR). The homogenized screen is shown to behave as a homogeneous slab with an effective magnetic permeability having large positive or negative values around the magnetic resonance of the particle, giving rise to selective shielding properties. The shielding performance of the screen are investigated, and the effects of several geometric parameters are carefully evaluated through an equivalent-circuit representation of the single particle and full-wave simulations.
Keywords :
equivalent circuits; magnetic permeability; magnetic resonance; magnetic shielding; equivalent-circuit representation; full-wave simulations; homogeneous slab; magnetic permeability; magnetic resonance; periodic array; planar negative-permeability screens; planar screen; resonant particles; shielding effectiveness; spiral resonator; split-ring resonator; Equivalent circuits; Magnetic fields; Magnetic materials; Magnetic particles; Magnetic resonance; Permeability; Polarization; Resonant frequency; Solid modeling; Spirals;
Conference_Titel :
Electromagnetic Compatibility, 2008. EMC 2008. IEEE International Symposium on
Conference_Location :
Detroit, MI
Print_ISBN :
978-1-4244-1699-8
Electronic_ISBN :
978-1-4244-1698-1
DOI :
10.1109/ISEMC.2008.4652085
