Fig. 5
From: Next-generation UWB antennas gadgets for human health care using SAR

3D polar plot, which shows the 3D directions of x, y, and z, where x is the phi and z denotes the theta
From: Next-generation UWB antennas gadgets for human health care using SAR
3D polar plot, which shows the 3D directions of x, y, and z, where x is the phi and z denotes the theta