Radiating emissions from the planar electromagnetic bandgap (EBG) structures

Mohajer-Iravani, Baharak; Ramahi, Omar M.

doi:10.1109/isemc.2010.5711378

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…In this paper, we show that material losses are not negligible as was assumed in [6]. Based on this new understanding, the differences between a suppression band and the EBG bandgap are addressed.…”

Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

“…In [6], we presented preliminary results that discussed discrepancies between an effective suppression band, as obtained from -parameters, and a bandgap, as obtained from Brillouin diagram for two-dimensional (2D) EBG structures. In [6], we discussed the potential of radiation from EBG structures at frequencies corresponding to those of higher order slow modes existing in the suppression band by assuming negligible material losses in the EBG patterned parallel planes. In [7], near-field measurements for FR4-based planar EBG structures, which are excited through a source driving 2 International Journal of Antennas and Propagation propagating modes between EBG planes, showed radiations to surrounding environment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the Suppression Band and Bandgap of Planar Electromagnetic Bandgap Structures

Mohajer-Iravani

Ramahi

2014

International Journal of Antennas and Propagation

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Electromagnetic bandgap structures are considered a viable solution for the problem of switching noise in printed circuit boards and packages. Less attention, however, has been given to whether or not the introduction of EBGs affects the EMI potential of the circuit to couple unwanted energy to neighboring layers or interconnects. In this paper, we show that the bandgap of EBG structures, as generated using the Brillouin diagram, does not necessarily correspond to the suppression bandwidth typically generated usingS-parameters. We show that the reactive near fields radiating from openings within the EBG layers can be substantial and are present in the entire frequency band including propagating and nonpropagating mode regions. These fields decay fast with distance; however, they can couple significant energy to adjacent layers and to signal lines. The findings are validated using full-wave three-dimensional numerical simulation. Based on this work, design guidelines for EBG structures can be drawn to insure not only suppression of switching noise but also minimization of EMI and insuring signal integrity.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Suppression Band and Bandgap of Planar Electromagnetic Bandgap Structures

Mohajer-Iravani

Ramahi

2014

International Journal of Antennas and Propagation

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“…These stopbands are different from the suppression bandgap of insertion loss, and it is mainly because the suppression band of the insertion loss is extracted for a finite number of EBG structures. Moreover, a bandgap implies the absence of propagating modes, whereas, a suppression band does not imply the absence of propagating modes …”

Section: Transmission Performance Of the Novel Ebgmentioning

confidence: 99%

A novel electromagnetic bandgap design applied for suppression of printed circuit board electromagnetic radiation

Zuo

et al. 2019

Int J RF Microw Comput Aided Eng

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In this article, a novel electromagnetic bandgap structure is applied to a high-speed printed circuit board, where the proposed concept is to etch with traditional L-bridge and extended connecting branches on the power plane. To investigate the electromagnetic characteristics of the proposed structure, its transmission performance is determined including an equivalent circuit to numerically predict the lower cutoff frequency. A near field electromagnetic interference measurement is carried out compared to a reference board to investigate the simultaneous switching noise suppression ability. K E Y W O R D S electromagnetic bandgap, electromagnetic interference, electromagnetic radiation, equivalent circuit model, simultaneous switching noise

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“…A monopole antenna is chosen as a basic structure since it can operate over a wide bandwidth and has good radiation characteristics . Different EBG structures have been proposed in the literature . Among them, a mushroom type EBG is chosen due to the simplicity of design and good isolation characteristics.…”

Section: Introductionmentioning

confidence: 99%

Compact MIMO antenna

Kumar

2016

Microw. Opt. Technol. Lett.

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In this letter, a miniature wide‐band 1 × 2 antenna is proposed. The proposed antenna has a wider impedance bandwidth, 70% and small size, 31 × 20 × 1.6 mm3. There is a good isolation between two antennas, below −15 dB in the operating band. A monopole configuration is used to achieve the wide‐band response and a mushroom type Electronics Band‐gap structure is incorporated between the two antennas to achieve better isolation. Proposed antenna is simulated using High‐Frequency Structure Simulator and a prototype is tested on Vector Network Analyzer. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1294–1298, 2016

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Radiating emissions from the planar electromagnetic bandgap (EBG) structures

Cited by 8 publications

References 6 publications

On the Suppression Band and Bandgap of Planar Electromagnetic Bandgap Structures

On the Suppression Band and Bandgap of Planar Electromagnetic Bandgap Structures

A novel electromagnetic bandgap design applied for suppression of printed circuit board electromagnetic radiation

Compact MIMO antenna

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