Table 1 The performance observation of proposed one-port, optimized one-port, two-port and four-port MIMO antenna designs.

From: Sickle-shaped high gain and low profile based four port MIMO antenna for 5G and aeronautical mobile communication

Number of ports

Return loss (dB)

Resonating frequency (GHz)

Bandwidth (GHz)

1

− 18.77

3.825

0.73 (3.445–4.175)

1-Optimized

− 18.65

3.935

0.82 (3.42–4.24)

2

− 19.79

3.835

0.71(3.515–4.225)

4

− 20.53

3

1.375 (2.14–3.515)

− 12.37

5.43

0.25 (5.335–5.585)