Fig. 8
From: Observation of reflectionless absorption due to spatial Kramers–Kronig profile
Impact of finite-size truncations. a Standing wave effect simulated at 2.4 GHz when the designed Kramers–Kronig (K–K) profile medium is cut off at different locations on the right side of the resonance region. The dashed red line indicates the location of edge 1 located at x = 0.54 m, where the permittivity is 3.3. The dashed blue line indicates the location of edge 2 at x = 0.33 m, where the permittivity is 1. The solid blue and red curves show the simulated standing wave effects due to edges 1 and 2, respectively. b Construction of a K–K profile medium slab for incidences from outside. The left dashed line indicates the front edge of the slab located at x = 5.45λ 0, where ε r = 1. The right dashed line indicates the back edge of the slab located at x = 13.45λ 0, where ε r = 0.55. The thickness of the designed slab is 8λ 0. c Simulated results for the K–K profile medium slab described in b when a point source is placed 2λ 0 away from the front edge
