Multigigahertz Causal Transmission Line Modeling Methodology Using a 3-D Hemispherical Surface Roughness Approach

Hall, S.; Pytel, S.G.; Huray, Paul G.; Hua, D.; Moonshiram, Anusha; Brist, Gary; Sijercic, E.

doi:10.1109/tmtt.2007.910076

Cited by 111 publications

(36 citation statements)

References 9 publications

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“…Ball-shape models are morphologically closer to the real surface roughness, as proposed by Hall et al [15], where the protrusions are modeled as periodic hemispheroids, and by Huray et al [16] using the "snow-ball" model (multi-stage spheres). More detailed studies from Pytel are available in [17].…”

mentioning

confidence: 84%

An Analysis of Conductor Surface Roughness Effects on Signal Propagation for Stripline Interconnects

Guo

Jackson

Koledintseva

et al. 2014

IEEE Trans. Electromagn. Compat.

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Conductors with a roughened surface have significant effects on high-speed signal propagation on backplane traces designed for a 10+ Gb/s network. An accurate approach to evaluate these effects, including the signal attenuation and the phase delay, is proposed in this paper. A differential extrapolation roughness measurement technique is first used to extract the dielectric properties of the substrate used for lamination, and then a periodic model is used to calculate an equivalent roughened conductor surface impedance, which is then used to modify the transmission line per-unit-length parameters R and L. The results indicate that the conductor surface roughness increases the conductor loss significantly as well as noticeably increasing the effective dielectric constant. This approach is validated using both a full-wave simulation tool and measurements, and is shown to be able to provide robust results for the attenuation constant within ±0.2 Np/m up to 20 GHz.

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mentioning

confidence: 84%

An Analysis of Conductor Surface Roughness Effects on Signal Propagation for Stripline Interconnects

Guo

Jackson

Koledintseva

et al. 2014

IEEE Trans. Electromagn. Compat.

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“…Согласно [8] обозначив скорость света c, найдем постоянную распростране учётом потерь для конкретной частоты в соответствии со следующим выражением:…”

Section: математическая модельunclassified

Equivalent Circuit and Mathematical Models of the Geometrical Heterogeneity Surface Accounting of a Microwave Multilayered Integrated Circuits Based-on the Technology of Low-Temperature Cofired Ceramics

Zyrin¹,

Karaban²

2016

J. Sib. Fed. Univ. Eng. technol.

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“…The conductor-ceramic interface will cause the electrical signal to travel a longer path following the contour of the ceramic at GHz frequencies, this has been pointed out in previous studies. [5,15,16] The printed conductor is thinner at the edges of the print; this topography is noted as the conductor edge angle. A large amount of conductor loss occurs at the edges [17] because current density increases at a conductor edge becoming larger as the corner gets sharper.…”

Section: Theorymentioning

confidence: 99%

The influence of substrate surface roughness on microstrip transmission line loss using conventional analyses and length‐scale fractal analysis

Vincent

Powers

Bar‐On

2009

Surface & Interface Analysis

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Two components of conductor topography can impact conductor loss for signals in the GHz frequency range: conductor-ceramic interface roughness and conductor edge angle. This study is an experimental investigation of the influence of these conductor topographies on conductor loss in microstrip circuits produced by thick-film technology. The aluminum nitride ceramic substrates have different surface roughnesses due to different surface finish processes. The substrate surfaces were characterized using conventional and length-scale fractal analysis. The conductor-ceramic interface was measured with a contact profilometer. The conductor edge angle and conductor edge profile were measured optically. It was found that there is a direct correlation between conductor loss and conductor edge angle, whereas there is an inverse correlation between loss and substrate roughness or relative length of the conductor-ceramic interface. This is the opposite result to the conventional expectation of surface roughness effects on conductor loss. There is also a negative correlation between conductor edge angle and surface roughness or relative length. The loss behavior can be explained by the interaction of the conductor paste with the surfaces during processing. The paste tends to spread more on the smoother surfaces, and thus creates an elongated edge of diminishing cross-section and a small edge angle. This leads to greater conductor loss.

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Multigigahertz Causal Transmission Line Modeling Methodology Using a 3-D Hemispherical Surface Roughness Approach

Cited by 111 publications

References 9 publications

An Analysis of Conductor Surface Roughness Effects on Signal Propagation for Stripline Interconnects

An Analysis of Conductor Surface Roughness Effects on Signal Propagation for Stripline Interconnects

Equivalent Circuit and Mathematical Models of the Geometrical Heterogeneity Surface Accounting of a Microwave Multilayered Integrated Circuits Based-on the Technology of Low-Temperature Cofired Ceramics

The influence of substrate surface roughness on microstrip transmission line loss using conventional analyses and length‐scale fractal analysis

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