Design and experimental characterization of a bandpass sampling receiver

Singh, Avantika; Kumar, Devika S.; Venkateswaran, Gomathy; Manjukrishna, S; Singh, Amrendra K.; Kurup, Dhanesh G.

doi:10.1063/1.4942711

Cited by 8 publications

(11 citation statements)

References 6 publications

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“…[17] Indeed, computations on hypothetical 24-valence-electron QHAs of formula FeRuTiX (X = Si, Ge, Sn) have shown non-magnetic ground states with a small energy bandgap (0.5-0.6 eV), one of the prerequisites for promising thermoelectric properties. [3,38,[73][74][75] Not long ago we ourselves theoretically looked at the thermoelectric properties of FeRuTiSi, in particular the electronic thermal conductivity, proposing a large potential value of ZT close to unity for this hypothetical QHA. [74] High thermal conductivity, which can be as high as 10 Wm À 1 K À 1 , is one important drawback for high ZT in Heusler materials [77] and therefore knowing the thermal conductivity can provide more realistic information on computed ZT of hypothetical QHAs.…”

Section: Introductionmentioning

confidence: 99%

“…[3,38,[73][74][75] Not long ago we ourselves theoretically looked at the thermoelectric properties of FeRuTiSi, in particular the electronic thermal conductivity, proposing a large potential value of ZT close to unity for this hypothetical QHA. [74] High thermal conductivity, which can be as high as 10 Wm À 1 K À 1 , is one important drawback for high ZT in Heusler materials [77] and therefore knowing the thermal conductivity can provide more realistic information on computed ZT of hypothetical QHAs. Thus, detailed electronic and phonon structure calculations for thermal stability and practical applicability of these compounds for thermoelectric applications are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

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First‐Principles Study on Electronic and Thermal Transport Properties of FeRuTiX Quaternary Heusler Compounds (X=Si, Ge, Sn)

Halet

Singh

et al. 2023

Zeitschrift anorg allge chemie

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The structural, electronic, thermal and lattice thermal transport properties of the three hypothetical quaternary Heusler alloys FeRuTiX (X=Si, Ge, Sn) were investigated with the aid of first‐principles calculations. All compounds were found to be semiconducting with a small indirect band gap. Flat bands near the conduction band edge and degenerate multi‐bands near the valance band edge suggest that these systems should exhibit both large Seebeck coefficients and good electrical conductivity. The analysis of the calculated vibrational spectra showed that the three compounds are thermodynamically stable. The computed lattice thermal conductivity indicates that among the three compounds that of FeRuTiSn is rather low at high temperature. Indeed, a low lattice thermal conductivity (∼3.5 Wm−1 K−1 at 1000 K) together with a small electronic band gap (0.51 eV) with an appropriate electronic structure (disperse and flat bands) render FeRuTiSn a promising candidate as a high‐temperature thermoelectric material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First‐Principles Study on Electronic and Thermal Transport Properties of FeRuTiX Quaternary Heusler Compounds (X=Si, Ge, Sn)

Halet

Singh

et al. 2023

Zeitschrift anorg allge chemie

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“…[ 1–4 ] However, the EM radiation and interference have gradually affected people's production and life, which causes EM pollution to human beings. [ 5–7 ] In addition, radar, infrared, and other detection technologies have been widely used in the field of aerospace and aviation with the development of the electronic information technology, [ 8–10 ] making EM wave absorption stealth technology become the focus of research. [ 11 ] Therefore, in the field of EM pollution protection and radar stealth technology, there is an urgent need to develop “thin, light, wide, and strong” high‐performance EM wave absorption materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of polyimide/carbon nanotube composite films with electromagnetic wave absorption performance

Jiang

Lin

Jia

et al. 2021

Polymer Engineering & Sci

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The polyimide (PI)/carbon nanotube (CNT) films including 3,3′,4,4′‐biphenyl tetracarboxylic dianhydride (BPDA), p‐phenylenediamine (p‐PDA), and CNTs were prepared, which have prominent electromagnetic (EM) wave absorption performance. Experimental analyses of the mechanical properties, thermal stabilities, coefficient of thermal expansion (CTE), the glass transition temperature (Tg), and EM parameter revealed the beneficial effects of the CNTs on the resulting composite films. In particular, when the content of CNTs is 6 wt%, the film shows the highest EM wave absorption performance, which exhibits the effective absorption bandwidth of 2.72 GHz with the matching thickness of only 2.0 mm. These results indicate that PI‐based films have a certain potential application in the area of EM wave‐absorbing materials.

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“…It possesses antimicrobial, antiplasmodial, antihypertensive, and antioxidant activities (Ali et al, 2012). Niloticane, a cassane diterpene (Eldeen et al, 2010), and umbelliferone, a coumarin (Singh et al, 2010), have been isolated from the plant, as well as some flavonoids and phenolic compounds (Saleem, 2011). Other Acacia species have yielded seco-oxacassanes and unusual diterpenoids such as schaffnerine, isolated from Acacia schaffneri (Manríquez-Torres et al, 2011;Manríquez-Torres et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Two New Antiprotozoal Diterpenes From the Roots of Acacia nilotica

et al. 2021

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The powdered roots of the medicinal plant Acacia nilotica were extracted with hexane and ethyl acetate, and the extracts were subjected to column chromatography for the isolation of potentially bioactive compounds and their screening against kinetoplastid pathogens. NMR and HREI mass spectrometric analyses identified two new diterpenes, characterized as 16, 19-dihydroxycassa-12-en-15-one (Sandynone, 1) and (5S, 7R, 8R, 9R, 10S, 13Z, 17S)-7,8:7,17:16,17-triepoxy-7,8-seco-cassa-13-ene (niloticane B, 2). The previously reported (5S,7R,8R,9R,10S) -(-)-7,8-seco-7, 8-oxacassa-13,15-diene-7,17-diol (3), (5S,7R,8R,9R,10S) -(-)-7,8-seco-7, 8-oxacassa-13,15-dien-7-ol-17-al (4), and (5S,7R,8R,9R,10S) -(-)-7,8-seco-7, 8-oxacassa-13,15-dien-7-ol (5) a, mixture of stigmasterol (6a) and sitosterol (6b), and lupeol (7) were also isolated. Several column fractions displayed significant activity against a panel of Trypanosoma and Leishmania spp., and from the most active fraction, compound 4 was isolated with high purity. The compound displayed high activity, particularly against T. brucei, T. evansi, and L. mexicana (0.88–11.7 µM) but only a modest effect against human embryonic kidney cells and no cross-resistance with the commonly used melaminophenyl arsenical and diamidine classes of trypanocides. The effect of compound 4 against L. mexicana promastigotes was irreversible after a 5-h exposure, leading to the sterilization of the culture between 24 and 48 h.

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Design and experimental characterization of a bandpass sampling receiver

Cited by 8 publications

References 6 publications

First‐Principles Study on Electronic and Thermal Transport Properties of FeRuTiX Quaternary Heusler Compounds (X=Si, Ge, Sn)

First‐Principles Study on Electronic and Thermal Transport Properties of FeRuTiX Quaternary Heusler Compounds (X=Si, Ge, Sn)

Preparation and properties of polyimide/carbon nanotube composite films with electromagnetic wave absorption performance

Two New Antiprotozoal Diterpenes From the Roots of Acacia nilotica

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