The radiation of a rectangular power-bus structure at multiple cavity-mode resonances

Leone, Marco

doi:10.1109/temc.2003.815560

Cited by 128 publications

(66 citation statements)

References 11 publications

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“…For PCBs that have solid power planes, direct radiation from the power bus structure is one possible source of radiated emissions [4,5]. A cavity formed by parallel copper planes in a board becomes resonant at certain frequencies and is capable of radiating efficiently at those frequencies.…”

Section: A Power Bus Resonancementioning

confidence: 99%

An investigation of the effect of chassis connections on radiated EMI from PCBs

Kobayashi¹,

Harada²,

Shaik³

et al. 2006

2006 IEEE International Symposium on Electromagnetic Compatibility, 2006. EMC 2006.

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Abstract-This paper investigates the effect of grounding posts when printed circuit boards are mounted near and parallel to a metal plate or chassis. Specifically, experimental data showing changes in radiated emission levels are explained by means of coupling phenomena between a power bus, a chassis cavity including grounding posts, and a cable connected to the power bus. This coupling is modeled using SPICE and the results are combined with an equivalent magnetic current source model to estimate the radiated emissions from various printed circuit board configurations. The calculated results are shown to be consistent with the corresponding experimental data.

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Section: A Power Bus Resonancementioning

confidence: 99%

An investigation of the effect of chassis connections on radiated EMI from PCBs

Kobayashi¹,

Harada²,

Shaik³

et al. 2006

2006 IEEE International Symposium on Electromagnetic Compatibility, 2006. EMC 2006.

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“…lower than theoretically expected. It is primarily due to the radiation loss that affects the characterizing of the loss factor of the quarterwavelength open stub resonator [12][13][14][15][16][17][18]. As shown in Figure 5, a parallel-plane structure is placed in a 9 m × 6 m × 6 m Semi-Anechoic Chamber for measuring its overall maximum radiation field.…”

Section: Resultsmentioning

confidence: 99%

Measurement of Rf PCB Dielectric Properties and Losses

Chou¹,

Jeng²,

Lee³

et al. 2008

PIER Letters

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Abstract-This paper presents the calculations of transmission line loss factor by extracting from the Q-factor measurement of the quarterwavelength open stub resonators over the designed frequency and other resonant frequencies. A comparison of the loss factor of the design frequency with other resonant frequencies of each of the stub's quarter-wave resonances is provided in this paper. The radiation and discontinuity losses are undesirably included in the unloaded Q-factor measurement and it shows that the unloaded Q-factor is not repeatable at different designed frequency. The implementation of the loss factor measurement by quarter-wavelength open stub resonators is becoming more and more important to be considered with the increase of using the electronic circuits operating at high frequencies. † This author is also with

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“…We derived the impedance matrix for the consideration of the external environment of the enclosure by using the equivalent source method, similarly as it has been done in [3] for planes with open boundaries. In case of an enclosure the metallic walls influence the field distribution.…”

Section: Cavity Model and Electric Far Field Expression For A Slmentioning

confidence: 99%

“…We obtained this formulation similarly as it has been done for power planes by [1] and [2] but with a variation of the boundary condition to consider the closed metallic walls of the enclosure. We also present the impedance matrix for the consideration of the external environment in Section III, which we obtain by the use of an equivalent source approach [3][4][6] [7] .…”

Section: Introductionmentioning

confidence: 99%

Domain separation with port interfaces for calculation of emissions from enclosure slots

Poschalko¹,

Selberherr

2008

2008 IEEE International Symposium on Electromagnetic Compatibility

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Abstract-An equivalent circuit method is used to define ports at the slots of enclosures to separate the external field domain from the internal over a broad frequency range. The aspect ratios of internal to external structures of electronic devices are usually difficult to handle in joint domain simulations. Our method provides the opportunity to simulate the domains separately and to connect the two models afterwards. We present an example for a cubical enclosure with a slot. We use a cavity model and an impedance network at the slot to consider the radiation loss. The results are compared with HFSS ® simulations.

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The radiation of a rectangular power-bus structure at multiple cavity-mode resonances

Cited by 128 publications

References 11 publications

An investigation of the effect of chassis connections on radiated EMI from PCBs

An investigation of the effect of chassis connections on radiated EMI from PCBs

Measurement of Rf PCB Dielectric Properties and Losses

Domain separation with port interfaces for calculation of emissions from enclosure slots

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