A 4 × 4 Beamforming Network for Spatial Diversity and Multiplexing Reconfiguration

Figure 3

Simulated S parameter results with different working states of the reconfigurable device: (a) 3 dB 90° hybrid coupler with the RF switches connecting the fork-shaped strips; (b) crossover with the RF switches turned off; (c) transmission line with the RF switches connecting the ground.

(a)

(b)

(c)