Research Article

Design of Microwave Antenna Array for Imaging of Multiphase Flows in Polypropylene Pipes

Figure 4

The horizontal scattering matrix of (a) 8 elements, (b) 16 elements: S1,1-S2,1-S3,1-S15,1-S16,1, and (c) 32 elements: S1,1-S2,1-S3,1-S31,1-S32,1.
(a)
(b)
(c)