Wideband power divider using double-layer periodic spoof surface plasmon polaritons

In this paper, a wideband power divider using single- and double-layer periodic spoof surface plasmon polaritons (SSPPs) is proposed. Double-sided parallel-strip line (DSPSL) is used to realize the wideband and low loss for the double-layer spoof SPPs. T-shaped spoof SPPs power dividers with large bandwidth, wideband isolation and low loss using double-layer spoof SPPs to single-layer spoof SPPs transition are realized. Conventional coplanar waveguide (CPW) is used as the output ports for the single-layer spoof SPPs. Good agreements can be observed between the measured and simulated results, indicating good potential applications in the integrated plasmonic devices.