From above plot it can be observed that return loss is -42.8 dB at 6.99 GHz frequency. The simulated bandwidth of
designed antenna is 2.2% (153 MHz), which is very narrow and not sufficient for today’s applications. Smith chart (Fig.2)
shows simulated portion from 6GHz to 8GHz. As shown,markers 1 and 2 indicates the intersect points of impedance
loop with VSWR=2 circle. A little portion of impedance loop is inside the vswr=2 circle and it is from 6.91 GHz to 7.07
GHz.