Metasurface-Based Cylindrical Lenses and Their Antenna Gain Enhancement

Figure 13

Two-dimensional radiation patterns of the freestanding microstrip patch antenna element and the T-type cylindrical metasurface lens antenna. (a) xy- and (b) xz-planes for TE-polarized radiation and (c) xy- and (d) xz-planes for TM-polarized radiation.

(a)

(b)

(c)

(d)