Energy Transfer Using Gradient Index Metamaterial

Table 1

Antenna parameters of the horn antenna with and without the gradient refractive index structure.

Antenna parameters	Standard horn antenna	With gradient refractive index structure	% change
Directivity	20.3 dB	21.9 dB	7.9
3 dB beam width	15.2°	12.2°	19.7
First side lobe level	−9.6 dB	−10.8 dB	12.5