Microwave studies on ZnS–HSR ionomers

Mathew, K. T.; Kumar, S. Biju; Lonappan, Anil; Jacob, Joe; Kurian, Thomas; Samuel, Jacob; Xavier, T.S.

doi:10.1016/s0254-0584(02)00291-2

Cited by 9 publications

(9 citation statements)

References 6 publications

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“…The microwave heating effect is expressed through a coefficient called the heating coefficient. It is defined as (Mathew et al 2003) r 1 . tan J ε δ = The variation of microwave heating coefficient of nanostructured NiFe 2 O 4 with frequency is shown in figure 5.…”

Section: Resultsmentioning

confidence: 99%

Microwave dielectric properties of nanostructured nickel ferrite

et al. 2008

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Nickel ferrite is one of the important ferrites used in microwave devices. In the present work, we have synthesized nanoparticles of nickel ferrite using chemical precipitation technique. The crystal structure and grain size of the particles are studied using XRD. The microwave dielectric properties of nanostructured nickel ferrite samples of three different average grain sizes and those of two sintered samples were studied. The parameters like dielectric constant, dielectric loss and heating coefficient of the nanoparticles samples are studied in the frequency range from 2⋅4 to 4 GHz. The values of these parameters are compared with those of sintered pellets of the same samples. All these parameters show size dependent variations.

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Section: Resultsmentioning

confidence: 99%

Microwave dielectric properties of nanostructured nickel ferrite

et al. 2008

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“…Microwave spectroscopy has become a very useful technique for studying the dielectric properties of materials. It is increasingly being used to probe fundamental questions in physics and chemistry such as superconductor films (Hein et al, 2002) and ionic polymers (Mathew et al, 2003). Microwaves also have more general, practical applications for treating and characterising foods (Ryynänen, 1995).…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of acetic acid and vinegar in the microwave frequencies range 1–20GHz

Bohigas

Tejada

2009

Journal of Food Engineering

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“…The efficiency of heating is represented by means of a dielectric heating coefficient which is defined as J ϭ 1/ r tan ␦ [5]. The microwave absorption measurements for various frequencies were done using the experimental setup shown in Figure 1.…”

Section: Materials Preparation and Measurementsmentioning

confidence: 99%

“…Several advancements have been made on the dielectric property study of materials. Here, we are performing the well known cavity perturbation technique [5] to study the dielectric properties of arrowroot. The properties such as permittivity and loss factor are significant in determining material properties.…”

Section: Introductionmentioning

confidence: 99%

Microwave properties of arrowroot and its medical applications

Kalappura

Augustine

Mathew

2009

Micro & Optical Tech Letters

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set from the 5.5 GHz, when the signal is injected, the phase noise of the ILFD is about Ϫ132.25 dBc/Hz, while the phase noise of the injection-reference is Ϫ125.88 dBc/Hz. At low offset frequency, the phase noise of the locked ILFD is smaller than the injection signal by about 6 dB. Figure 13 shows the measured output spectra of the divider before and after the locked conditions in the Ϭ2 mode. The locked output spectrum shows a lower phase noise. Table 1 shows the performance summary of the proposed ILFD. Tables 2 and 3 show the performance comparison between published ILFDs in the divide-by-3 and -2 mode, respectively. CONCLUSIONThis article proposes a new CMOS LC-tank ILFD circuit and the chip has been successfully implemented in the TSMC 0.18-m CMOS process. The differential ILFD consists of double-crosscoupled VCO and a composite resonator, where a pair of switched inductors with an inductor in series with an injection MOSFET is used. In the differential injection mode, the ILFD can have the division ratio of 1 and 3, in the single injection mode, the ILFD can have the division ratio of 2, other higher modulo is beyond the limit of experimental set up.

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Microwave studies on ZnS–HSR ionomers

Cited by 9 publications

References 6 publications

Microwave dielectric properties of nanostructured nickel ferrite

Microwave dielectric properties of nanostructured nickel ferrite

Dielectric properties of acetic acid and vinegar in the microwave frequencies range 1–20GHz

Microwave properties of arrowroot and its medical applications

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