Figure 4

The S parameters of the monopole antenna pair for (a) the case without decoupling component and (b) the case with decoupling component are presented. The mutual coupling (dotted line in blue) can be decreased to a −10-dB level while the bandwidth of −10-dB return loss changed little. The radiation pattern for the cases (c) without and (d) with the decoupling component are compared, from which one can see the radiation pattern can be reshaped with the use of singular media. (e) The efficiency comparison with/without the decoupling component.