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Experimental verification of the concept of all-dielectric nanoantennas
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic of an all-dielectric Yagi-Uda nanoantenna composed of high-permittivity dielectric spheres. The antenna consists of a reflector (sphere 1) and three directors (spheres 2 to 4). A dipole source is placed equally from the reflector (sphere 1) and first director (sphere 2).

Image of FIG. 2.
FIG. 2.

Radiation pattern of the antenna in (a) E-plane and (b) H-plane at the frequency 10.7 GHz. Solid lines show the results of numerical simulations in CST; the crosses correspond to the experimental data.

Image of FIG. 3.
FIG. 3.

Directivity of the all-dielectric Yagi-Uda antenna in E and H planes obtained from the CST numerical simulations.

Image of FIG. 4.
FIG. 4.

Photographs of the all-dielectric Yagi-Uda microwave antenna. (a) Detailed view of the antenna placed in a holder. (b) Antenna placed in an anechoic chamber; the coordinate z is directed along the vibrator axis; the coordinate y is directed along the antenna axis.

Image of FIG. 5.
FIG. 5.

Experimentally measured antenna’s directivity in both E- and H-planes [cf. Fig. 3]. The curves connect the experimental points as a guide to the eye.


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Scitation: Experimental verification of the concept of all-dielectric nanoantennas