Fast Calculation of Radiated Emissions from Arbitrarily Shaped PCB with IC/LSI

Nishida, M.; Toyota, Yoshitaka; Iokibe, Kengo; Koga, Ryuji; Wada, Osami

doi:10.1109/elmagc.2007.4413479

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…(2) can be further simplified according to [12], but in the present calculations the general equation has been used. It can be observed that the general procedure of this type of calculation of the radiated field is well known in the literature, for example in [13], [14] and [2].…”

Section: Radiation From the Power/ground Planesmentioning

confidence: 99%

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Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation

Paoletti¹,

Hisakado²,

Wada³

2009

IEICE Trans. Commun.

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Power and ground planes on multilayer PCBs can effectively radiate electromagnetic fields excited by the IC simultaneous switching noise. The high frequency electromagnetic radiation is often calculated from the electric field along the edge of the PCB, which can be estimated with a cavity model using magnetic walls. The excitation of the cavity modes is related to the via current passing through the power bus planes at the interconnection between IC package and PCB. Usually the attention is focused on the differential-mode current of the package pins, but in the present paper it is shown that the common-mode current flowing out from package pins plays a very important role in the excitation of cavity modes, and its neglect implies a fatal underestimation of the electromagnetic radiation from the power bus planes in some circumstances. A second important contribute to the radiation is given by the common mode current on the pins, together with the current flowing on the PCB ground plane. With the proposed equivalent circuit, the effectiveness of decoupling inductors depending on their location and on the value of the parasitic capacitance is studied.

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Section: Radiation From the Power/ground Planesmentioning

confidence: 99%

“…in [1]) representing the IC and driving the resonances of the power/ground planes (e.g. in [2]), which can be calculated with a cavity model using vertical magnetic walls (e.g. in [3]).…”

Section: Introductionmentioning

confidence: 99%

Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation

Paoletti¹,

Hisakado²,

Wada³

2009

IEICE Trans. Commun.

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“…This kind of radiation from a multilayer PCB is considered as one of the main sources of EMI from electronic devices. Although many literatures have discussed the power integrity problems and power bus noise of the parallel plane pair [ Fan et al , 2001; Wang et al , 2005; Engin et al , 2006, 2007; Leone , 2003; Nishida et al , 2007], effective design guidelines for suppressing the EM radiation still remain unclear. Effective methods for predicting and suppressing EMI are desirable, which can maintain signal integrity (SI) over a broad band and have a clear physical meaning at the same time.…”

Section: Introductionmentioning

confidence: 99%

A study on characteristics of EM radiation from stripline structure

Kayano

Inoue

2011

Radio Science

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[1] In recent years, effective methods for predicting and suppressing electromagnetic interference over a broad band are required. In this paper, we focus on the prediction of electromagnetic (EM) radiation from a stripline structure with a ground thin wire by an equivalent circuit model. First, frequency responses of common-mode (CM) current on the printed circuit board and EM radiation are studied with finite difference time domain modeling. Secondly, an equivalent circuit model for predicting CM current is proposed. The equivalent circuit model for prediction is based on the concepts of CM antenna impedance, distributed constant circuit, and electric coupling between the power plane and the thin ground wire. Good agreement between the predicted and full-wave analysis results indicates the validity of the proposed equivalent circuit model. The frequency response of EM radiation from the stripline structure can be identified using our proposed model. In addition, the equivalent circuit model provides enough flexibility for different geometric parameters and can be used to develop physical insights and design guidelines.Citation: Kayano, Y., and H. Inoue (2011), A study on characteristics of EM radiation from stripline structure, Radio Sci., 46, RS0F06,

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Fast Calculation of Radiated Emissions from Arbitrarily Shaped PCB with IC/LSI

Cited by 2 publications

References 4 publications

Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation

Importance and Limitations of Modeling Parasitic Capacitance between Package and PCB for Power Bus Noise and Radiation

A study on characteristics of EM radiation from stripline structure

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