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Common mode filtering performances of planar EBG structures

Common mode filtering performances of planar EBG structures,10.1109/ISEMC.2009.5284711,F. De Paulis,A. Orlandi,L. Raimondo,B. Archambeault,S. Connor

Common mode filtering performances of planar EBG structures   (Citations: 13)
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This paper approaches the filtering behavior of electromagnetic bandgap (EBG) structures. The transfer function, in terms of S-parameters, of a single ended and a differential microstrip line referenced to an EBG plane are considered: the notches (causing signal attenuation) and flat regions (causing signal propagation) are related to the geometry and characteristics of the EBG structure and can be designed to filter out unwanted harmonic components of the signal. A different EBG-like structure is proposed and its performances analyzed.
Published in 2009.
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    • ...Unfortunately, conversion easily occurs, due to signal trace length mismatch [6] or asymmetric discontinuities in the circuit layout, and in particular at a bend of coupled microstrip lines [2, 4, 5]. A reduction of the unwanted common-mode noise can be obtained by applying filtering structures [4, 5] or by adding extra compensating capacitance [2]...
    • ...Unfortunately, conversion easily occurs, due to signal trace length mismatch [6] or asymmetric discontinuities in the circuit layout, and in particular at a bend of coupled microstrip lines [2, 4, 5]. A reduction of the unwanted common-mode noise can be obtained by applying filtering structures [4, 5] or by adding extra compensating capacitance [2]...

    C. Gazdaet al. Time domain analysis of a wideband common-mode suppression filter for ...

    • ...If the bridges are removed the obtained geometry looks simply as a sequence of patches forming independent cavities (with the solid plane underneath) whose resonant frequency can be easily determined [9]-[12]...
    • ...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...
    • ...It has been shown [9]-[10] that there is duality between the S21 from the simulation of a single ended trace and the Scc21 of a differential pair; thus singleended models are preferred and employed for the next simulations introduced in this section...

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

    • ...The two planes of the EBG structure, part of the power delivery network, can be used as a passive common mode filter [11] as well as signal reference [12] and can be on the outer layers or embedded in the board stack-up [13], [14]...

    Leo Raimondoet al. A Simple and Efficient Design Procedure for Planar Electromagnetic Ban...

    • ...It has been demonstrated that planar EBG can be efficiently used for power integrity (PI) issues [7]-[9] as well as for signal integrity (SI) problems [10]-[13]...

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

    • ...The regular planar EBG is investigated in [9], studying the effects of the patterned plane on both common mode and differential mode signal propagation along a differential microstrip line...
    • ...The fundamental mechanisms of planar EBG structures are given in details in [9], [11]...
    • ...The details of the model and the simulation settings are given in [9], [11]...
    • ...978-1-4244-6307-7/10/$26.00 ©2010 IEEE 764 The same model for single-ended microstrip is extended in [9] to a differential microstrip pair...

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

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