TY - JOUR A1 - Shamonin (Chamonine), Mikhail A1 - Shamonina, Ekaterina A1 - Kalinin, V. A1 - Solymar, L. T1 - Resonant frequencies of a split-ring resonator: Analytical solutions and numerical simulations JF - Microwave and optical technology letters N2 - A set of differential equations describing the current andvoltage distribution in a split-ring resonator is derived and solved ana-lytically. The resonant frequencies may be obtained from the solution of a characteristic equation. An approximate solution for the lowest reso-nant frequency agrees with that obtained by heuristic arguments. The analytical results are supported by numerical simulations KW - metamaterial KW - split-ring resonator KW - resonant frequencies KW - equivalent distributed circuit KW - characteristic equation Y1 - 2004 U6 - https://doi.org/10.1002/mop.20567 VL - 44 IS - 2 SP - 133 EP - 136 PB - Wiley ER - TY - JOUR A1 - Shamonin (Chamonine), Mikhail A1 - Shamonina, Ekaterina A1 - Kalinin, V. A1 - Solymar, L. T1 - Properties of a metamaterial element: Analytical solutions and numerical simulations for a singly split double ring JF - Journal of Applied Physics N2 - An equivalent circuit, consisting of bulk and distributed elements, is derived for describing the properties of a potential metamaterial element capable of providing negative effective permeability. It is the singly split double ring (SSDR), a special case of the split ring resonator (J. B. Pendry et al., IEEE Trans. Microwave Theory Tech. 47, 2075 (1999)), obtained when the gap capacitance in the inner ring is infinitely large. The variables are the inter-ring voltage and the currents flowing in the inner and outer rings. The excitation is assumed in the form of a spatially constant temporally varying magnetic field. The functions, showing the angular variation of the variables, are found by solving a set of differential equations with boundary conditions imposed at the position of the split. It is shown from the analytical solution that the SSDR can have resonant frequencies in the full spectrum from very low to very high frequencies. It is pointed out in particular that whenever the mean diameter of the ring is equal to an odd multiple of the half wavelength it is always possible to find a set of parameters which will give rise to resonance. As examples the resonant frequencies are determined for eight sets of parameters. Results are also derived by replacing the distributed circuit with a number of discrete circuits. It is finally shown that the results obtained from the equivalent circuit model are in excellent agreement with those derived from the MICRO-STRIPES numerical package which solves Maxwell’s equations in the time domain. Y1 - 2004 U6 - https://doi.org/10.1063/1.1652251 VL - 95 IS - 7 PB - AIP ER -