Dual Zeroth-Order Resonant USB Dongle Antennas for 4G MIMO Wireless Communications

Figure 9

Measured three-dimensional radiation patterns of two antennas in the MIMO system: (a) antenna 1 at 890 MHz, (b) antenna 1 at 2600 MHz, (c) antenna 2 at 890 MHz, and (d) antenna 2 at 2600 MHz.

(a)

(b)

(c)

(d)