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Design of a Common Mode Filter by Using Planar Electromagnetic Bandgap Structures

Design of a Common Mode Filter by Using Planar Electromagnetic Bandgap Structures,10.1109/TADVP.2010.2046167,IEEE Transactions on Advanced Packaging,F

Design of a Common Mode Filter by Using Planar Electromagnetic Bandgap Structures   (Citations: 4)
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In this paper, an embedded electromagnetic bandgap structure is proposed for harmonic filtering of differential signal's undesired common mode components. Rather than use lumped circuit components and likely causing some degradation to the intended high speed differential signal, the embedded planar common mode filter causes no degradation to the intended signal, and enhances the signal integrity and electromagnetic compatibility performance of the system. Single ended and differential traces are considered and the impact of the common mode filtering is measured in terms of mixed mode scattering parameters and eye diagram metrics. The systematic procedure to design such a structure is outlined, and its design robustness is also verified.
Journal: IEEE Transactions on Advanced Packaging - IEEE TRANS ADV PACKAG , vol. 33, no. 4, pp. 994-1002, 2010
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    • ...The common mode transfer function (Scc21) has notches at the patch resonances, therefore the patch can be sized to achieve a resonance at the frequency of the common mode fundamental harmonic [9]-[11] that one wants to filter out...

    F. de Pauliset al. Routing strategies for improving common mode filter performances in hi...

    • ...In [15] it is shown that the CM filter performance is best when the bridges, small conductive segments connecting the patches, are removed...
    • ...This kind of patch isolation allows one to analytically predict/design the resonant frequencies of the patch itself and hence to properly tune the filter dimensions according to the CM harmonics that must be filtered out [15]...
    • ...The electromagnetic explanation of such behavior is given in Fig. 4. The return current of the aggressor lines, at the gap, flows on the bottom solid plane (black solid arrows), as stated in [12]-[15]...

    F. De Pauliset al. Compact configuration of a planar EBG based CM filter and crosstalk an...

    • ...These principles are applied in [10] for filtering the common mode noise in a differential signal due to some imbalance...
    • ...The electromagnetic properties and the layout technique presented in [10] regulating the EBG common-mode filter behavior are extended in this work...
    • ...EBG structure is theoretically and numerically investigated in [10], and its effectiveness is demonstrated...

    F. De Pauliset al. Experimental validation of common-mode filtering performances of plana...

    • ...In recent years it has been a growing interest in the investigation of the electromagnetic bandgap (EBG) structures, due to their performances in reducing the noise propagation within the power/ground planes of multilayer printed circuit boards (PCB) [1,2] or in filtering the common mode components of the signal [3-5]...

    Francesco de Pauliset al. Equivalent circuit models for evaluation of bandgap limits for planar ...

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