Fig. 8

SbD validation (LTE-1800 and LTE-3500 bands). Front view of optimized layout (a). Simulated/measured behavior of associated scattering parameter (b) and radiation patterns at 1.795 GHz and at 3.5 GHz when c\(\varphi =\frac {\pi }{2}\) and d\(\theta =\frac {\pi }{2}\)