Wideband frequency-domain characterization of FR-4 and time-domain causality

Djordjević, A.R.; Biljie, R.M.; Likar-Smiljanić, V.; Sarkar, Tapan K.

doi:10.1109/15.974647

Cited by 289 publications

(142 citation statements)

References 11 publications

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“…The spacing between the microstrips vary over the design range [100 − 500] . The dielectric is 300 thick and characterized by a dispersive and lossy permittivity which has been modeled by the wideband Debye model [12]. The frequency-dependent p.u.l.…”

Section: Numerical Resultsmentioning

confidence: 99%

Time-domain parametric sensitivity analysis of multiconductor transmission lines

Spina

Ferranti

Antonini

et al. 2011

2011 IEEE 15th Workshop on Signal Propagation on Interconnects (SPI)

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We present a new parametric macromodeling technique for lossy and dispersive multiconductor transmission lines (MTLs). This technique can handle design parameters, such as substrate or geometrical layout features, and provide time-domain sensitivity information for voltage and currents at the ports of the lines. It is based on a recently introduced spectral approach for the analysis of lossy and dispersive MTLs [1], [2] and it is suited to generate state-space models and synthesize equivalent circuits, which can be easily embedded into conventional SPICE-like solvers. Parametric macromodels which provide sensitivity information are well suited for design space exploration, design optimization and crosstalk analysis. A numerical example validates the proposed approach in both frequency and time domain. IntroductionThe recent advances in fabrication methods and the rapid increase in operating speeds, density, and complexity of modern integrated circuits has made signal integrity a challenging task for high-frequency circuit designers. Consequently, highspeed interconnect modeling has become of paramount importance to properly capture physical effects such as reflection, crosstalk and propagation delays. The increased circuit complexity requires that designers make the proper trade-offs between conflicting design requirements using optimization techniques, in order to obtain the best possible performance. To achieve this goal, efficient and accurate sensitivity information with respect to interconnect parameters can be used to boost the efficiency of powerful optimizers that employ gradient-based techniques.In [3] a parametric macromodeling technique for lossy and dispersive MTLs is presented: it provides time-domain information for voltage and current at the ports of the lines, starting from the knowledge of the MTL per-unit-length (p.u.l.) parameters. In the present paper the cited method is extended to perform the parametric sensitivity analysis of MTLs with respect to either geometric or physical parameters directly in the time-domain. the proposed technique it is based on the spectral decomposition proposed in [1], [2] and on the numerical interpolation of the p.u.l. parameters.

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Section: Numerical Resultsmentioning

confidence: 99%

Time-domain parametric sensitivity analysis of multiconductor transmission lines

Spina

Ferranti

Antonini

et al. 2011

2011 IEEE 15th Workshop on Signal Propagation on Interconnects (SPI)

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“…From the parallel plate measurements (Figures 1c and d), the VeroWhite material has a dielectric constant of~3.0 and a dissipation factor of~0.02 up to 1 GHz. The dissipation factor of the material is rather high and can cause attenuation of the RF signal; however, FR-4 also has a dissipation factor of 0.02 and is the go-to material for low-cost RF applications 20 . Overall, this material is adequate for many RF designs but does have appreciable dielectric loss, and it has limitations in terms of temperature range (o 45°C) that should be respected.…”

Section: Methodsmentioning

confidence: 99%

Fully inkjet-printed microwave passive electronics

2017

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Fully inkjet-printed three-dimensional (3D) objects with integrated metal provide exciting possibilities for on-demand fabrication of radio frequency electronics such as inductors, capacitors, and filters. To date, there have been several reports of printed radio frequency components metallized via the use of plating solutions, sputtering, and low-conductivity pastes. These metallization techniques require rather complex fabrication, and do not provide an easily integrated or versatile process. This work utilizes a novel silver ink cured with a low-cost infrared lamp at only 80°C, and achieves a high conductivity of 1 × 10 7 S m −1. By inkjet printing the infrared-cured silver together with a commercial 3D inkjet ultraviolet-cured acrylic dielectric, a multilayer process is demonstrated. By using a smoothing technique, both the conductive ink and dielectric provide surface roughness values of o500 nm. A radio frequency inductor and capacitor exhibit state-of-the-art quality factors of 8 and 20, respectively, and match well with electromagnetic simulations. These components are implemented in a lumped element radio frequency filter with an impressive insertion loss of 0.8 dB at 1 GHz, proving the utility of the process for sensitive radio frequency applications.

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“…The noncausal waveform of the simulation result is explained by ignoring the frequency dependence of and tgΔ during the simulation process. This effect is considered in detail in [26]. However, more detailed simulation and explanations of these results are out of the scope of this paper.…”

Section: Detection and Identificationmentioning

confidence: 99%

Contactless Modal Phenomena Based Approach to Detecting, Identifying, and Diagnosing of Electrical Connections

Orlov

Gazizov

2018

Complexity

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This paper presents a unified description of a new approach for contactless detection, identification, and diagnostics of electrical connections and describes an idea and principles of using modal probing for these tasks. Simulation and experimental results on pulsed signal propagation through flat cables demonstrate the modal decomposition of a pulsed signal, which varies depending on the state of the probed wire. It is shown that the presented tasks can be solved by modal probing. The article also considers the analysis of modal distortions in frequency domain and gives the formula for its practical use. This formula can be useful when the pulse duration time is longer than the minimum of mode delay difference. In conclusion, we present further development ideas of the modal probing.

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Wideband frequency-domain characterization of FR-4 and time-domain causality

Cited by 289 publications

References 11 publications

Time-domain parametric sensitivity analysis of multiconductor transmission lines

Time-domain parametric sensitivity analysis of multiconductor transmission lines

Fully inkjet-printed microwave passive electronics

Contactless Modal Phenomena Based Approach to Detecting, Identifying, and Diagnosing of Electrical Connections

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