Wirelessly Pattern Reconfigurable Yagi Antenna Based on Radio Frequency Identification

Figure 1

(a) Proposed structure and functionability of the antenna; (b) geometry of the antenna. L1 = 200, H1 = 75, L2 = 43, H2 = 46, L3 = 5, H3 = 2, L4 = 14, H4 = 26, L5 = 2.2, H5 = 33, L6 = 8, H6 = 3, L7 = 28, H7 = 40, L8 = 30, H8 = 60, L9 = 2.5, H9 = 1, R1 = 12.5, R2 = 18, R3 = 9.5, all units in mm. .