Determination of complex permittivity of materials in rectangular waveguides using a hybrid electromagnetic method

Kobata, Teppei; Karim, Mohamad Shaiful Abdul; Momoeda, Kotaro; Kitazawa, Takio

doi:10.1109/cem.2013.6617133

Cited by 2 publications

(1 citation statement)

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“…An inverse technique was used to predict the permittivity, or dielectric constant, of the MUT, based on the measured transmission parameter. The transmission parameter was determined by the electromagnetic theory formula by estimating the initial value of the dielectric constant [36]. The estimation was repeated until the calculated and measured transmission parameter values were in reasonable agreement.…”

Section: Permittivity Test Of Cellulose Fibersmentioning

confidence: 99%

Effect of Fiber Morphology and Elemental Composition of Ananas comosus Leaf on Cellulose Content and Permittivity

Yusof

Zainol

Aziz

et al. 2023

Curr. Appl. Sci. Technol.

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The fiber morphology and elemental composition of pineapple leaf fibers were analyzed to understand their effect on the cellulose content and permittivity value. Cellulose fiber was extracted from pineapple leaf via the alkaline treatment method, and the content was determined using the Kurschner-Hanack method. The permittivity value of the developed cellulose fiber was measured based on the waveguide technique in the G-band. The surface morphology of the developed fiber was examined with scanning electron microscopy. Meanwhile, energy dispersive X-ray (EDX) spectroscopy was used to identify the elemental composition of the pineapple leaf fibers. The findings were that the cellulose fibers with the least diameter and distance between fibers exhibited the highest permittivity value, which was 1.85. The EDX analysis demonstrated that carbon was the commonest elemental in all fibers, and was 55 wt.% of the total element composition. Furthermore, the results showed that the permittivity value increased as the carbon composition increased, and decreased as the oxygen composition increased. Hence, the morphological and elemental studies of the cellulose fiber are useful in determining the permittivity value of the cellulose fiber for material development. The high permittivity value of the pineapple leaf fibers is believed to have great potential for use in electronic components.

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Section: Permittivity Test Of Cellulose Fibersmentioning

confidence: 99%