On the range of input impedances for a small embedded antenna

In this paper, we investigate the range of input impedances that are available for a small embedded antenna using stochastic antenna design methods. The trade-off parameters include the feed position, the embedded position, and the granularity of the antenna representation. The embedded antenna is 2 x 2 cm, and the device is approximated with a 5 x 5 cm planar metal structure. From the investigations, it is clear that the center-edge embedded antenna has a wider range of available impedances than a corner embedded antenna. Furthermore, for the considered case, a reduction of the antenna-representation granularity increases the range of available impedances. Elements of a port-specific dual bound are also presented.