Design of multiple band-notch ring resonator filter based on plasmonic metamaterial at microwave frequency

摘要

In this paper, we report a planar ring resonator based on the concept of spoof or designer surface plasmon polaritons (SSPP's). Also an ultrathin plasmonic metamaterial structure corrugated with periodical trapezoidal shape grooves has been reported. When metal surface is corrugated with periodical grooves, it support surface plasmon polaritons mode at microwave frequency which is known as designer or spoof SPP's. In this work first a transition device is implemented using the gradient corrugated strip, in which SSPP wave is highly confined at the teeth part of the corrugated surface. After that, a ring has been introduced and coupled with the same plasmonic waveguide. The proposed devices are designed and fabricated. Simulation and measurement results of reflection and transmission coefficient are in good agreement at microwave frequency.