Enhanced microwave absorption behavior of polyaniline-CNT/polystyrene blend in 12.4–18.0GHz range

Saini, Parveen; Choudhary, Veena; Singh, Bhanu Pratap; Mathur, R.B.; Dhawan, S. K.

doi:10.1016/j.synthmet.2011.04.033

Cited by 264 publications

(165 citation statements)

References 16 publications

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“…S-parameters (S 11 & S 21 ) are measured with VNA system. Further, reflection (SE R ), absorption (SE A ) components of SE and total shielding effectiveness (SE T ) are calculated using these parameters as [32,33]:…”

Section: Shielding Effectiveness (Se)mentioning

confidence: 99%

Tuning of Microwave Absorption Properties and Electromagnetic Interference (Emi) Shielding Effectiveness of Nanosize Conducting Black-Silicone Rubber Composites Over 8-18 GHZ

Jani

Patra²,

Saini³

et al. 2017

PIER M

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Abstract-In this paper, studies on broadband microwave absorption and electromagnetic shielding effectiveness are reported in flexible rubber composites with low filler content of nanosize conducting carbon over 8-18 GHz frequency range of electromagnetic spectrum. Rubber based composites are prepared by loading of 1-15 wt% nanosize conducting Carbon Black (CB) in silicone rubber matrix. Effect of percentage loading of nanosize CB on DC conductivity, dielectric & microwave absorption properties and electromagnetic Shielding Effectiveness (SE) of silicone rubber composites is studied. The percolation threshold is achieved at low concentration (3 wt%) of CB in composites. The observed complex permittivity values revealed that composites with concentration of 5 wt% CB can provide more than 90% microwave absorption (Reflection Loss > −10 dB) over 8-18 GHz at composite thickness of 1.9-2.7 mm. Further, composites with concentration of 15 wt% of CB shows −40 dB SE over the broad frequency range 8-18 GHz at thickness 2.8 mm. The effect of composite thickness on microwave absorption properties and shielding effectiveness is also analyzed. Thus, the prepared rubber composites with suitable concentration of nanosize CB as filler may be used as microwave absorber in stealth applications as well as for EMI shielding of electronic equipments in various civilian and military areas.

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Section: Shielding Effectiveness (Se)mentioning

confidence: 99%

Tuning of Microwave Absorption Properties and Electromagnetic Interference (Emi) Shielding Effectiveness of Nanosize Conducting Black-Silicone Rubber Composites Over 8-18 GHZ

Jani

Patra²,

Saini³

et al. 2017

PIER M

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“…EMI shielding effectiveness can be expressed as (Saini et al , 2011Singh et al 2013). SE T ðdBÞ ¼ 10 log…”

Section: Mechanical Properties Of the Compositesmentioning

confidence: 99%

Enhanced microwave shielding and mechanical properties of multiwall carbon nanotubes anchored carbon fiber felt reinforced epoxy multiscale composites

et al. 2013

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Multi-walled carbon nanotubes (MWCNTs) were grown on carbon fiber (CF) felt by chemical vapor deposition that resulted into strongly anchored carbon nanotubes (CNTs) on the CF surface. These multiscale preforms were used as the reinforcement in epoxy resin to develop multi scale CF felt-MWCNT/epoxy composites. The flexural strength (FS) and the flexural modulus (FM) of the composites were found to increase with increasing amount of CNTs grown on CF felt surface. FS improved by 37 %, i.e. 119 MPa compared to 87 MPa for CF felt/epoxy composites prepared under identical conditions. The FM also improved by 153 %, i.e. 15.7 GPa compared to 6.2 GPa for the CF/epoxy composites. The incorporation of MWCNTs on the CF felt produced a significant change in the electromagnetic interference shielding of these composites which improved from -21 to -27 dB for CF felt-MWCNT/epoxy multiscale composites in the Ku band (12.4-18 GHz) and indicates the usefulness of these strong composites for microwave shielding.

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“…There are numerous studies in the literature on electromagnetic shielding effectiveness and some of them related to our motivation can be found in [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Material Analysis and Application for Radio Frequency Electromagnetic Wave Shielding

Yener

Cerezci

2016

Acta Phys. Pol. A

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Our environment is full of radio frequency (RF) electromagnetic radiation due to rapid progress of wireless communication technologies, which have many applications, such as base stations of mobile communication networks and wireless internet antennas. In the context of Electromagnetic Compatibility (EMC) discipline, the word shield is used to describe any sort of metal sheet or material capable of reflecting, refracting or absorbing electromagnetic radiation (EMR), which is custom manufactured for the target electronic device casing, in a way to intervene any radiation passing to and from the device. Examining of electromagnetic shielding effectiveness (SE) is an important part of not only ensuring electromagnetic compatibility and of protecting electrical and electronic equipment but also protection of human beings against electromagnetic energy exposure as well. In this study, after a brief introduction and review on electromagnetic shielding, material selection and their applications for an indoor environment protection against electromagnetic radiation are explained. Potential electromagnetic shielding values of fabrics found in the market have been analyzed and compared by considering various criteria and requirements. Experimental results show that around 20 dB shielding effectiveness values can be obtained using test fabrics for a typical indoor environment.

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Enhanced microwave absorption behavior of polyaniline-CNT/polystyrene blend in 12.4–18.0GHz range

Cited by 264 publications

References 16 publications

Tuning of Microwave Absorption Properties and Electromagnetic Interference (Emi) Shielding Effectiveness of Nanosize Conducting Black-Silicone Rubber Composites Over 8-18 GHZ

Tuning of Microwave Absorption Properties and Electromagnetic Interference (Emi) Shielding Effectiveness of Nanosize Conducting Black-Silicone Rubber Composites Over 8-18 GHZ

Enhanced microwave shielding and mechanical properties of multiwall carbon nanotubes anchored carbon fiber felt reinforced epoxy multiscale composites

Material Analysis and Application for Radio Frequency Electromagnetic Wave Shielding

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