High-Directivity Antenna Array Based on Artificial Electromagnetic Metamaterials with Low Refractive Index

Figure 6

Photographs of patch antenna array and measured status in the anechoic chamber: (a) 2 × 2 element patch antenna array; (b) back view of the antenna array; (c) patch array with MTMs-cover; (d) MTMs-cover antenna in the anechoic chamber.

(a)

(b)

(c)

(d)