Equivalent circuit parameters of planar transmission lines with spoof surface plasmon polaritons and its application in high density circuits

Wu, Chia Ho; Shen, Linfang; Zhang, Hang; Yan, Jun; Hou, Da Jun; Zhou, Guobing; Wu, Yi-Liang

doi:10.1038/s41598-019-55200-z

Cited by 7 publications

(5 citation statements)

References 25 publications

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“…In order to calculate the characteristic impedance modulus , one can be referred to the method provided in Refs. 15 , 16 , where the capacitance and inductance of the unit length of the periodic microstrip lines can be extracted from the Maxwell equations. The numerical result of the capacitance and inductance per unit length of the SPMLs selected in this paper is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…( 4 ). To enable the circuit model to provide an accurate S -parameters calculation result, the resistance value of metallic conductors in the microstrip line can be obtained by the perturbation method 15 and the conductance can be calculated by using the relevant equations given in Ref. 17 .…”

Section: Resultsmentioning

confidence: 99%

“…In order to accelerate the application of these periodic microstrip lines to actual circuits, a first task is to provide the characteristic impedances and equivalent circuits. In the literature, many researchers have built the circuit models for periodic microstrip lines and extracted the circuit parameters, providing the low frequency characteristic impedances 15 , 16 , so that the -parameters of such periodic microstrip lines can be calculated by using the SPICE simulator and the performance of the circuit systems can be simulated in combination with other active devices.…”

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confidence: 99%

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A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance

Wu,

Qian,

Wang

et al. 2023

Sci Rep

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Since a planar periodic transmission line can suppress drastically the electromagnetic coupling, it would be advantageous to use such a kind of transmission lines in solving the problem of miniaturization of circuit area. By adjusting the lattice constants and geometric parameters of periodic microstrip lines, a time domain characteristic impedance that is the same as that of conventional microstrip lines (CMLs) can be achieved. Such periodic microstrip lines can therefore be used to trick high-speed digital signals, causing a digital signal to misjudge the time domain characteristic impedance of the transmission lines. The theoretical analysis has been verified by our experimental measurement results. Besides, a specific expression for the characteristic impedance of lossless periodic artificial materials is deduced by a circuit model and a standard of misidentification for the characteristic impedance of periodic microstrip lines is given for the digital signals.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance

Wu,

Qian,

Wang

et al. 2023

Sci Rep

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“…The circuit parameters of the periodic microstrip line are extracted under the quasi-static approximation [30,31]. In addition, in the literature, some references [32][33][34] and microwave engineering standard textbooks [26,27] also provided the methods for calculating the equivalent circuit parameters of transmission lines.…”

Section: Theoretical Analysismentioning

confidence: 99%

Time domain response of corrugated transmission lines

Wu,

Wang,

Peng

et al. 2023

IET Microwaves Antenna & Prop

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In order to employ periodic corrugated microstrip lines for reducing or suppressing electromagnetic interference in high‐speed or high‐frequency circuits, a precise method is necessary to calculate and measure the characteristic impedance of periodic microstrip lines. The equation for characteristic impedance (depending on frequency) of lossless periodic microstrip lines was obtained based on the transfer matrix method. A time domain pulse was used to measure the instantaneous impedance of conventional microstrip lines, and when the instantaneous impedance does not change with distance, it can be identified as the characteristic impedance of microstrip lines. However, when the time‐domain pulses are employed to measure the instantaneous impedance of periodic microstrip lines, rapid oscillations occur with distance. Therefore, a standard for spacing between adjacent grooves in the microstrip line can be suggested by analysing the interaction between the time‐domain pulses and the microstrip line grooves. Once such a standard is satisfied, many grooves etched along the microstrip line would no longer be distinguished by the time‐domain pulses. Such a principle and method can be used to determine the instantaneous impedance for the microstrip lines that have periodic grooves. On the other hand, when several periodic structures with different lattice constants coexist on a microstrip line, they can also be distinguished via the instantaneous impedance. A time domain reflectometer was used for measuring the instantaneous impedance of periodic microstrip lines, and the measured results are in agreement with the theoretical analysis.

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“…[39] 0.04-0.12 THz <−10 dB ∼−1.5dB From Table 3, it can be observed that most of the previous researchers have worked with SSPP interconnects operating in the gigahertz range. For example, 2-14 GHz, 0-10 GHz, 6-11 GHz and 46.1-73.7 GHz are the simulated frequencies found in [18,30,32,33], respectively. However, the existing electrical connectors show fairly good performance in the gigahertz frequency.…”

Section: Performance Summary and Comparisonmentioning

confidence: 99%

Effects of Variation in Geometric Parameters and Structural Configurations on the Transmission Characteristics of Terahertz-Range Spoof Surface Plasmon Polariton Interconnects for Interchip Data Communication: A Finite Element Method Study

Daiyan,

Abi,

Rashid

et al. 2023

Electronics

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Interconnects have become a major obstacle in chip scaling. Spoof surface plasmon polariton (SSPP) modes have gained attention for their ability to manipulate light beyond diffraction limits at a given frequency, leading to SSPP interconnects. This article investigates the transmission characteristics of SSPP interconnect pairs placed side by side in the terahertz frequency range with comprehensive performance analysis. The proposed SSPP waveguide pair exhibits a maximum transmission coefficient of around −0.05 dB in the −3 dB band in the terahertz frequency range. Due to field confinement near the metal–dielectric interface, energy remains confined for the designed SSPP interconnect pair system. The proposed SSPP structure shows several bands in the terahertz frequency range, whereas conventional interconnects shows almost zero transmission at such frequencies. Additionally, the effect of geometric parameters on transmission coefficients (S21) and coupling coefficients (S41) has been investigated. Moreover, it has been shown that the bandwidth, as well as the upper cutoff frequency, can be tuned by varying the geometric parameters such as groove height, groove width and groove density. Since global interconnects undergo bending in actual circuits during distant data transmission on chips, geometric mismatches may occur between adjacent pairs of SSPP interconnects. Hence, it has also been examined how bending and mismatches affect transmission and coupling coefficients. Several SSPP schemes have been simulated, among which the best performance is obtained with 2 μm mismatch in groove height. For this optimized design, two corrugated metal interconnects are considered with groove heights of 20 μm and 22 μm, respectively, a groove width of 3 μm, a period of 20 μm, and the number of grooves at 50. For this particular configuration, an ultra-wide passband is found having a bandwidth of almost 400 GHz, with a signal reflection of below −12 dB and little insertion loss of ∼−1.43 dB.

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Equivalent circuit parameters of planar transmission lines with spoof surface plasmon polaritons and its application in high density circuits

Cited by 7 publications

References 25 publications

A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance

A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance

Time domain response of corrugated transmission lines

Effects of Variation in Geometric Parameters and Structural Configurations on the Transmission Characteristics of Terahertz-Range Spoof Surface Plasmon Polariton Interconnects for Interchip Data Communication: A Finite Element Method Study

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