Experimental measure of transmission characteristics of low-frequency surface plasmon polaritons in frequency and time domains

Abstract

In this work, based on the use of the concept of spoof surface plasmon polaritons (spoof SPPs), we propose a novel kind of microstrips to suppress the interference between bended parallel microstrips. This novel structure is implemented by introducing subwavelength periodic structures onto the sides of a conventional microstrip. We numerically analyze the transmission characteristics of such new microstrips. We also measure the suppression arising from crosstalk between the bended corrugated microstrip and the conventional microstrip in both frequency and time domains. Experimental results show that such transmission line structure has superb interference restraining properties. Additionally, transmission properties have been investigated using circuit model. It is found that the coupling effect between the corrugated microstrip and the conventional microstrip can be efficiently suppressed in high speed digital signal transmission application.

An Ultra‐Compact Spoof Surface Plasmon Polariton Transmission Line and Its Signal Integrity Analysis

“…Compared to the previously reported works, [33][34][35][36] the proposed UCSSPP TL has a narrower linewidth and can achieve better crosstalk suppression performance at a smaller separation, as summarized in Table 1.…”

“…Thanks to the strong confinement characteristics of SSPPs, they have naturally exhibited unique advantages in crosstalk suppression. [33][34][35][36] However, most of the previously reported works either have a complicated double-layer structure that is difficult to be compatible with the conventional MS circuits or have wide linewidth that is not conducive to the design of highly integrated circuits. Hence, the development of TL with narrow linewidth and good signal integrity can realize the miniaturization of devices and greatly improve the degree of integration of planar circuits.…”

Analysis of the Electromagnetic Interaction Between Periodically Corrugated Transmission Lines Through the Mutual Capacitance and Mutual Inductance

“…This is a severe challenge to miniaturization of circuit area. This isolation method is not very effective in the case of higher frequencies [18]. Generally speaking, for two conventional coupled microstrip lines, the ratio of mutual capacitance to self-capacitance is smaller than the ratio of mutual inductance to self-inductance, which leads directly to a greater FEXT.…”

Analysis of electromagnetic interaction between smooth and corrugated transmission lines by using a circuit model

“…It is found that the separation distance greatly influences the $$S$$‐parameters between two microstrip lines, and it may generate a resonant coupling effect when an inappropriate separation distance is chosen. However, with the increasing signal frequency, the spacing rules and the grounded guard trace are no longer effective in crosstalk suppressing [16]. The above two isolation methods involve at least three times the microstrip line width, which will lead to serious difficulties in reducing the circuit area.…”