A new spoof surface plasmon polaritons based T-splitter

Abstract

In this article, a new T-splitter based on spoof surface plasmon polaritons with the performance of high transmission efficiency in a wide frequency range is proposed. An equal power divider is constructed with commendable isolation between the two output ports based on the spoof SPP-TLs targeting to divide the power of the spoof SPP-TL into two equal parts with the same ratio. In general, there exists big impedance mismatch between the input and output ports in a 3 port lossy network. For this purpose, a stepped-impedance section is co-designed with accurate precision near the junction of the splitter which comes up with excellent impedance-matching between the spoof SPP-TLs and the coplanar waveguides. The proposed splitter attributing ultra-wide bandwidth, low loss, compact length and well balanced performance is a strong contender on bases of its high capability and excellent utilization in advancing integrated plasmonic appliances in microwave and terahertz frequency regimes.