Open AccessElectric tunability of microwave permeability dispersion behaviors of metamaterials
Author(s) -
Zhong Shun-Lin,
Han Man-Gui,
Deng Long-jiang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.117501
Subject(s) - metamaterial , materials science , split ring resonator , microwave , capacitance , permeability (electromagnetism) , resonator , ferrite (magnet) , voltage , diode , relative permeability , permittivity , optoelectronics , nuclear magnetic resonance , dielectric , physics , composite material , porosity , electrode , quantum mechanics , membrane , biology , genetics
By embedding a capacity-variable diode into a split ring resonator (SRR), it is found that the effective capacitance of such an SRR element can be varied by the biased voltage of diode. Therefore the resonance frequency and effective permeability of an SRR element can be tuned. Based on these results, a smart microwave magnetic metamaterial is proposed. Employing the finite-difference time-domain and retrieval method, the variations of resonance frequency and permeability of the SRR element are simulated and calculated by changing the biased voltage. It is found that with the decrease of capacitance due to the increase of biased voltage, the resonance frequencies are shifted towards lower values, and so are the resonance frequencies of permeability dispersion. Finally, the difference in permeability dispersion behavior between SRR structure and natural magnetic material (for instance, ferrite) has been pointed out.