Table 4. Performance (transmissions and ratio) of the binary structures in Fig. 7.

Initial permittivity	2D TL → R	2D TR → L	2D Ratio	3D TL → R	3D TR → L	3D Ratio
1	90.3	4.1	22	52	2.2	24
4	90.2	3.4	26	57	1.8	32
8	93.5	3.2	29	78	2.6	30
12	83.5	27.1	3.1	72	21	3.4