Reflectometer for small reflection coefficient measurements in millimeter and centimeter wave bands

Apletalin, V. N.; D’yakonova, O. A.; Kazantsev, Yu. N.; Simonyan, D E; Solosin, V. S.; Zubov, A. S.

doi:10.1109/euma.1993.336877

Cited by 5 publications

(3 citation statements)

References 6 publications

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“… Comparison of G‐band frequencies in Raman spectra of (a) single‐walled CNT “HIPCO”,12 (b) MWCNT,3 and (c) GNP of this work. …”

Section: Resultsmentioning

confidence: 99%

“…Dielectric properties of nanocomposites in microwave range (3.2–40 GHz) were measured by the cavity resonance method using KSVN R‐2 standing wave instruments (Russia) with rectangular‐shaped waveguides and resonators ( H 01n operating mode). The cavity resonance method is based on the determination of the shift of resonance frequency Δ f and the change of cavity Q factor (1/ Q − 1/ Q 0 ) when the sample is inserted into the cavity 12. For example, at frequency 4.8 GHz Q factor of the cavity was −20 dB; Q factor of the cavity with sample inserted was −18/−10 dB, depending on dielectric losses of the sample.…”

Section: Methodsmentioning

confidence: 99%

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Composite materials of graphene nanoplatelets and polypropylene, prepared by in situ polymerization

Polschikov

Недорезова

Klyamkina

et al. 2012

J of Applied Polymer Sci

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Nanocomposites of polypropylene and graphene nanoplatelets were synthesized by in situ polymerization in liquid monomer in the presence of highly effective isospecific homogeneous metallocene catalyst. Microstructure, mechanical, dielectric, and thermal properties of composites are presented. X‐ray phase analysis data indicate that graphene nanoplatelets are present in composites as thin flaky particles aggregates, with aspect ratio affected by sonication of reaction mixture. Crystallization temperature of polypropylene increases in composites. Nanocomposites are characterized by high rigidity, thermal stability, and crystallization temperature, low conductivity, and high dielectric losses in the microwave range. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“… Comparison of G‐band frequencies in Raman spectra of (a) single‐walled CNT “HIPCO”,12 (b) MWCNT,3 and (c) GNP of this work. …”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Composite materials of graphene nanoplatelets and polypropylene, prepared by in situ polymerization

Polschikov

Недорезова

Klyamkina

et al. 2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…4,5 Frequency dependence of reflection was measured using horn antennas for wavelengths 2.7-10 cm with samples placed on metal plates.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Synthesis and properties of electromagnetic wave shielding polymer materials with low flammability

Волков

Zelenetsky

Шевченко

et al. 2010

J of Applied Polymer Sci

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Novel polyethylene-and polypropylenebased electromagnetic wave shielding and absorbing composite materials with low combustibility, enhanced thermal and mechanical properties, containing graphite, grinded wood, and fire retardants, were developed and investigated. Flame-resistance, thermal and mechanical properties of these materials was investigated. Electromagnetic wave reflection coefficients over the frequency range 20-40 GHz were measured; at moderate concentration (10-15%) of functional filler, reflection coefficient can be as low as À16 dB for PE and À11 dB for PP composite, respectively. Coke formation mechanism was investigated, the principal role in this process is attributed to aromatization and condensation of aromatic compounds with the formation of polycyclic aromatic systems, an important role of phosphoric acids in accelerating this process was found.

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Method for measuring reflection coefficients in free space for decimetric waves

Apletalin¹,

D’yakonova²,

Kazantsev³

et al. 1994

Meas Tech

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Reflectometer for small reflection coefficient measurements in millimeter and centimeter wave bands

Cited by 5 publications

References 6 publications

Composite materials of graphene nanoplatelets and polypropylene, prepared by in situ polymerization

Composite materials of graphene nanoplatelets and polypropylene, prepared by in situ polymerization

Synthesis and properties of electromagnetic wave shielding polymer materials with low flammability

Method for measuring reflection coefficients in free space for decimetric waves

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