An approach for optimizing the reconfigurable antenna and improving its reconfigurability
In order to reduce the complexity of the antenna and improve its reconfigurability, a multi-port network algorithm and a function of minimum probability (MP) are proposed. This function is used to evaluate the effects that different switches on the overall reconfigurability of the antenna. During the simulation process, switches to be evaluated are turned on and off, respectively; while the other switches are in ON and OFF randomly. After receiving the impedance matrix of the Z matrix in that way, and evaluating each switch in the state of on and off by calculating the matrix network, those switches which have less contribution to the reconfigurability can be removed by sorting the minimum probabilities from bigness to smallness. To verify the feasibility of this method, a multi-switch reconfigurable antenna is introduced. The number of switches is reduced from 85 to 12 while still has the ability of reconfiguration at the entire band of 2 to 7 GHz. What's more, the probability of resonance at each frequency has been increased.