High performance broadband noise filter using inductance cancellation technique and various capacitors

Shiraki, Y.; Oka, Naoto; Sasaki, Y.; Ohashi, Hideyuki

doi:10.1109/emceurope.2016.7739162

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…Shiraki et al 9 present a noise filter in a signal line, that consists of a shunt capacitor and a coil for inductance cancelation, which improves the filter performance in the high‐frequency regime. Comparing their filter with coil “

β

” to a filter without coil, the authors report an attenuation of the relevant scattering parameter

S_{21}

of about

20 dB

for frequencies

f > 30 MHz

.…”

Section: Numerical Resultsmentioning

confidence: 99%

Efficient sensitivity analysis of lumped elements with respect to finite‐element geometry changes

Stysch

Klaedtke

Gersem

et al. 2022

Int J Numerical Modelling

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Sensitivity analysis enables powerful gradient-based mathematical programming techniques in the optimization of electromechanical products with respect to electromagnetic compatibility requirements. We present a sensitivity analysis method based on finite element solutions of both a magnetoquasistatic system in a tree-cotree gauge and an electrostatic system. A repeated application of the adjoint method ensures a high computational efficiency, which is showcased in a comparison with an earlier approach. Application examples provided are the optimization of a noise filter and the sensitivity computation of a choke with dispersive magnetic core.

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β

” to a filter without coil, the authors report an attenuation of the relevant scattering parameter

S_{21}

of about

20 dB

for frequencies

f > 30 MHz

.…”

Section: Numerical Resultsmentioning

confidence: 99%

Efficient sensitivity analysis of lumped elements with respect to finite‐element geometry changes

Stysch

Klaedtke

Gersem

et al. 2022

Int J Numerical Modelling

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show abstract

“…In [1], diagonally and shunt-connected two film capacitors called "X-capacitor-inductor structure" is reported which can be equivalently transformed by network theory into a one shunt-path circuit containing a negative inductance to cancel ESL. In [2]- [7], negative inductance is equivalently added in series to the shunt-path by magnetic coupling between various circuit components: a main line and a shunt-path [2], loops configured by via holes and lines connected to chip capacitors [3], a spiral-shaped line and a line connected to a three-terminal chip capacitor [4], vertically stacked coupled square loops [5], a chip capacitor itself and a main line [6], and a chip capacitor itself and bilateral lines adjacent to the capacitor [7].…”

Section: Introductionmentioning

confidence: 99%

An ESL-Cancelling Circuit for a Shunt-Connected Film Capacitor Filter Using Vertically Stacked Coupled Square Loops

YONEDA,

KOBAYASHI,

TANIGUCHI

2023

IEICE Trans. Commun.

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An ESL-cancelling circuit for a shunt-connected film capacitor filter using vertically stacked coupled square loops is reported in this paper. The circuit is applicable for a shunt-connected capacitor filter whose equivalent series inductance (ESL) of the shunt-path causes deterioration of filter performance at frequencies above the self-resonant frequency. Two pairs of vertically stacked magnetically coupled square loops are used in the circuit those can equivalently add negative inductance in series to the shunt-path to cancel ESL for improvement of the filter performance. The ESL-cancelling circuit for a 1-µF film capacitor was designed according to the Biot-Savart law and electromagnetic (EM)-analysis, and the prototype was fabricated with an FR4 substrate. The measured result showed 20-dB improvement of the filter performance above the selfresonant frequency as designed, satisfying S dd21 less than −40 dB at 1 MHz to 100 MHz. This result is almost equivalent to reduce ESL of the shuntpath to less than 1 nH at 100 MHz and is also difficult to realize using any kind of a single bulky film capacitor without cancelling ESL.

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A study for designing an ESL-cancelling circuit for shunt capacitor filters based on the biot-savart law

Yoneda

Hirose

Kobayashi

et al. 2017

2017 IEEE International Symposium on Electromagnetic Compatibility &Amp; Signal/Power Integrity (EMCSI)

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High performance broadband noise filter using inductance cancellation technique and various capacitors

Cited by 3 publications

References 8 publications

Efficient sensitivity analysis of lumped elements with respect to finite‐element geometry changes

Efficient sensitivity analysis of lumped elements with respect to finite‐element geometry changes

An ESL-Cancelling Circuit for a Shunt-Connected Film Capacitor Filter Using Vertically Stacked Coupled Square Loops

A study for designing an ESL-cancelling circuit for shunt capacitor filters based on the biot-savart law

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