Probing Electric Field in an Enclosed Field Mapper for Characterizing Metamaterials

Figure 2

(a) The normalized S21 magnitude along the propagation direction. The solid red and blue lines are the measurement for the enclosed and the gap case, respectively, and the black line denotes the 2D simulation. The dash lines represent the exponential fitting of the magnitude decay with a decay length 1613 mm (red dash line) and 119 mm (blue dash line). (b) and (c) The measured maps of magnitude in the gapped and enclosed case, respectively, where the region sandwiched by the white lines denotes the waveguide cavity. (d) The simulated magnitude map.