Metamaterialen

Animationen zu elektromagnetischen Feldern

1wg_meta_h2GHz_over

Propagation of two kinds of modes in an array of broadside coupled split ring resonators inserted in the symmetry plane of an X-band rectangular waveguide (This animation and below). The animation of the mode propagating at 2 GHz represents the absolute value of the magnetic field in the left-handed (backward) wave. The cutoff frequency of the hollow waveguide fc=6.5 GHz.

zipped AVI-Movie, 8.5 MB

2wg_meta_h4GHz_over

Propagation of two kinds of modes in an array of broadside coupled split ring resonators inserted in the symmetry plane of an X-band rectangular waveguide (This animation and above). The animation of the mode propagating at 4 GHz represents the absolute value of the magnetic field the right-handed (forward) wave. The cutoff frequency of the hollow waveguide fc=6.5 GHz.

zipped AVI-Movie, 8.5 MB

3wed_det_dng_10GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by an array of unit cells composed of split ring resonators and wires. Negative refraction is observed at 10 GHz, in the double negative frequency band (effective electric permittivity and magnetic permeability are both negative at 10 GHz).

zipped AVI-Movie, 4.5 MB

4wed_det_dps_15GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by an array of unit cells composed of split ring resonators and wires. Positive refraction is observed at 15 GHz, in the double positive frequency band (effective electric permittivity and magnetic permeability are both positive at 15 GHz).

zipped AVI-Movie, 5.0 MB

5wed_eff_dng_10GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Homogeneous metamaterial representation is based on the effective electric permittivity and magnetic permeability extracted with the PFDM method (Parameter Fitting of Dispersive Models) from the unit cell analysis. Negative refraction is observed at 10 GHz, in the double negative frequency band (electric permittivity and magnetic permeability are both negative at 10 GHz).

zipped AVI-Movie, 2.5 MB

6wed_eff_dng_15GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Homogeneous metamaterial representation is based on the effective electric permittivity and magnetic permeability extracted with the PFDM method (Parameter Fitting of Dispersive Models) from the unit cell analysis. Positive refraction is observed at 15 GHz, in the double positive frequency band (electric permittivity and magnetic permeability are both positive at 15 GHz).

zipped AVI-Movie, 2.5 MB

7wed_det_3d_07GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by a lattice of unit cells composed of split ring resonators and wires. Strong reflection and high attenuation are observed at 7 GHz, in the single negative frequency band (stopband, effective electric permittivity is negative, whereas effective magnetic permeability is positive at 7 GHz).

zipped AVI-Movie, 4.5 MB

8wed_det_3d_10GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by a lattice of unit cells composed of split ring resonators and wires. Negative refraction and backward wave in the metamaterial are observed at 10 GHz, in the double negative frequency band (effective electric permittivity and magnetic permeability are both negative at 10 GHz).

zipped AVI-Movie, 5.9 MB

9wed_det_3d_115GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by a lattice of unit cells composed of split ring resonators and wires. Strong reflection and high attenuation is observed at 11.5 GHz, in the single negative frequency band (stopband, effective electric permittivity is negative, whereas effective magnetic permeability is positive at 11.5 GHz). The attenuation at 11.5 GHz is significantly lower than at 7 GHz due to the lower values of the magnitudes for the real parts of permittivity and permeability.

zipped AVI-Movie, 5.0 MB

10wed_det_3d_15GHz_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by a lattice of unit cells composed of split ring resonators and wires. Positive refraction and forward wave in the metamaterial are observed at 15 GHz, in the double positive frequency band (effective electric permittivity and magnetic permeability are both positive at 15 GHz).

zipped AVI-Movie, 7.2 MB

11wed_det_10GHz_r75cm_small

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Detailed metamaterial macrostructure is represented by an array of unit cells composed of split ring resonators and wires. Negative refraction is observed at 10 GHz, in the double negative frequency band (effective electric permittivity and magnetic permeability are both negative at 10 GHz). The radius of the semicircle equals 75 cm that is equivalent to 25 free space wavelengths.

No animation available!

JPG-Picture, 0.2 MB

wed_eff_10GHz_r75cm_over

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Homogeneous metamaterial representation is based on the effective electric permittivity and magnetic permeability extracted with the PFDM method (Parameter Fitting of Dispersive Models) from the unit cell analysis. Negative refraction is observed at 10 GHz, in the double negative frequency band (electric permittivity and magnetic permeability are both negative at 10 GHz). The radius of the semicircle equals 75 cm that is equivalent to 25 free space wavelengths.

zipped AVI-Movie, 2.0 MB

farfield_10GHz_polar

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Polar farfield characteristics for the detailed (LHS) and effective (RHS) macrostructures at 10 GHz (double negative band, negative refraction observed). Direction of the main beam: theta = -14 deg for the detailed wedge (LHS) vs theta = -13 deg for the homogeneous wedge (RHS).

No animation available!

JPG-Picture, 0.2 MB

13farfield_15GHz_polar_small

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. Polar farfield characteristics for the detailed (LHS) and effective (RHS) macrostructures at 15 GHz (double positive band, positive refraction observed). Direction of the main beam: theta = +22 deg for the detailed wedge (LHS) vs theta = +21 deg for the homogeneous wedge (RHS).

No animation available!

JPG-Picture, 0.2 MB

14farfield_10GHz_3d_small

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. 3d farfield characteristics for the detailed (LHS) and effective (RHS) macrostructures at 10 GHz (double negative band, negative refraction observed). Direction of the main beam: theta = -14 deg for the detailed wedge (LHS) vs theta = -13 deg for the homogeneous wedge (RHS).

No animation available!

JPG-Picture, 0.3 MB

15farfield_15GHz_3d_small

Simulation of the negative refraction experiment in a wedge shaped metamaterial [RA Shelby, DR Smith, and S Schultz: „Experimental verification of a negative index of refraction“, Science 292, pp. 77-79, Apr. 2001]. 3d farfield characteristics for the detailed (LHS) and effective (RHS) macrostructures at 15 GHz (double positive band, positive refraction observed). Direction of the main beam: theta = +22 deg for the detailed wedge (LHS) vs theta = +21 deg for the homogeneous wedge (RHS).

No animation available!

JPG-Picture, 0.3 MB