A High-Efficiency Microstrip Antenna Pair with Similar Pi-Shaped Decoupling Structure for 3.5 GHz 5G Ultrathin Smartphones

Figure 5

(a) Overall view of the dual-port microstrip antenna pair. The far-field radiation pattern of the dual-port microstrip antenna pair at 3.5 GHz. (b) When port 1 is excited. (c) When port 2 is excited. Surface current distributions are at 3.5 GHz. (d) When port 1 is excited. (e) When port 2 is excited.