Design and Implementation of Single-Layer 4 × 4 and 8 × 8 Butler Matrices for Multibeam Antenna Arrays
Figure 5
Pictures of certain fabricated prototypes. (a) Top view of the BMs that correspond to the layouts of Figures 2(b) and 2(c) and bottom view of the layout depicted in Figure 2(b). (b) Top view of the 8 × 8 BM.
