Study on Roll-Off Characteristics at Upper Cutoff Frequency of SSPP Transmission Lines

Abstract

In this paper, the roll-off characteristic at the upper cutoff frequency of spoof surface plasmon polariton (SSPP) transmission lines with linear tapered transitions is studied. The SSPP structure with different number of units are investigated using a cascaded equivalent circuit model. It is found that the roll-off rate reaches its maximum value at a specified number of units. The variation of the roll-off rate with different geometric parameters is also discussed.