A microfluidically-tuned dual-band slot antenna

A reconfigurable dual-band slot antenna with the capability of independently controlling each band is proposed. The tuning method is based on employing the reactive loading effect of a fluid metal placed on top of each slot antenna. Digital frequency tuning is achieved by using different configurations of four empty and filled channels. This way a 4-bit reconfigurable antenna is achieved in which each resonant frequency of the dual-band response can be controlled separately. Realization of the tunable antenna using common PCB technologies and PDMS structure is demonstrated. The implemented prototype antenna is measured and tuning ranges of 2.2-3.3 GHz and 4.15-5.4 GHz are achieved for the first and second bands, respectively.