A Miniaturized Planar Monopole Antenna Based on a Coupling Structure for Compact Mobile Internet of Things (IoT) and Electric Vehicles (EVs) Device Applications in 5G, LTE, WLAN, WiMAX, Sirius/XM Radio, V2X, and DSRC Wireless Systems

Figure 2

The surface current distributions at different operating frequencies: (a) 2350 MHz; (b) 2450 MHz; (c) 2600 MHz; (d) 3050 MHz; (e) 3500 MHz; (f) 3750 MHz.

(a)

(b)

(c)

(d)

(e)

(f)