Cured epoxy resin dielectric characterization based on accurate waveguide technique

Hasan, Nurulfadzilah; Hussain, Nur Shahira Mat; Faudzi, Ahmad Afif Mohd; Shaharum, Syamimi Mardiah; Yusof, Nurhafizah Abu Talip; Noordin, Nurul H.; Mohtadzar, Nur Alia Athirah; Karim, Mohamad Shaiful Abdul

doi:10.1063/1.5118088

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…Subsequently, the permittivity of the dielectric material was derived through the inverse method of the measured transmission coefficient [38]. Figure 3 shows the flow of the permittivity measurement.…”

Section: Phase 3: Materials Characterization 231 Permittivity Measure...mentioning

confidence: 99%

Fabrication of Cellulose Powder Dielectric Composite Material using Pineapple Leaves Fiber

Rudraa Devi Giamasrow,

Nurhafizah Abu Talip Yusof,

Azahani Natasha Azman

et al. 2024

ARASET

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Pineapple, known for its delicious taste and nutritional value, generates substantial waste in the form of cores, leaves, and skin, resulting in significant yearly accumulations. Efficient disposal of pineapple waste has become a critical challenge due to its increasing production and potential environmental pollution. The objective of this paper is to volarize natural fibre derived from pineapple waste by fabricating it into a new dielectric composite material. The fabrication process of dielectric composite material was achieved by using the optimization technique through Design Expert software, resulting in noteworthy findings. Then, the properties of the fabricated materials were analysed in terms of their permittivity value and elemental composition. The permittivity value of the newly fabricated dielectric materials was measured using the vector network analyser (VNA) method, while their elemental composition was characterized using energy-dispersive X-ray (EDX) spectroscopy. The correlation between elemental composition and the permittivity value of newly fabricated composite materials is analysed in this paper. As a result, the dielectric composite material attained its highest permittivity (4.08) when composed of 76.02% carbon and 22.61% oxygen. Conversely, the material exhibited a lower permittivity value (2.87) when its carbon content decreased to 69.32% and its oxygen content increased to 29.81%. This outcome highlights the crucial role of carbon in absorbing and storing electromagnetic signals, influencing the dielectric properties of the material. In conclusion, this paper unveils a ground-breaking use for waste pineapple leaves, showcasing how their carbon content significantly affects the resulting dielectric composite material's permittivity. This innovative eco-friendly material presents a sustainable alternative for non-recyclable dielectric materials in electronic devices such as PCBs, antennas, and sensors, for example.

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Section: Phase 3: Materials Characterization 231 Permittivity Measure...mentioning

confidence: 99%

Fabrication of Cellulose Powder Dielectric Composite Material using Pineapple Leaves Fiber

Rudraa Devi Giamasrow,

Nurhafizah Abu Talip Yusof,

Azahani Natasha Azman

et al. 2024

ARASET

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“…The incidence wave that passes through the DS is collimated in order to refraction process [10]. The dielectric material used in the proposed design is epoxy resin, whose ε r = 2.716 [11,12]. This epoxy resin is used in 3D printing technology.…”

Section: Cla With Dielectric Superstrate (Ds)mentioning

confidence: 99%

Analysis and Design of Wide Band 28/38 GHz Antenna Array Integrated with 3D printed Dielectric Lens For 5G Automotive Applications

khairy¹,

Elboushi

Shaalan

et al. 2022

Preprint

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This paper presents the design of a Chebyshev linear antenna array (CLA) integrated with the dielectric lens. In comparison to a uniform amplitude distribution (UAD), a Chebyshev amplitude distribution (CAD) is used to achieve a low side lobe level (SLL) characteristic and increase the directivity of the antenna array. The proposed CLA is optimized to operate at a high fifth generation (5G) frequency. The proposed CLA achieves a -10 dB broadband width from 25.8 GHz to 42.4 GHz. The dielectric lenses can be employed to modify the phase and amplitude of the antenna array, which increases the realized gain and leads to stable radiation over the operational bandwidth. The main purposes of the dielectric lens are to improve the realized gain, enhance efficiency, and result in stable radiation pattern properties. The CLA is integrated with an epoxy resin dielectric lens, which has a relative permittivity (εr) of 2.716. The proposed CLA integrated with a dielectric lens has a realized gain of 15.2 dB at 28 GHz and 11.94 dB at 38 GHz, respectively. The proposed design is simulated using CSTMWS2020 and HFSS. However, to verify the obtained results, the proposed design is fabricated using a photolithography process technique, and the dielectric lens is fabricated using a 3D printing technique.

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“…Furthermore, ceramic nanoparticles such as barium titanate are considered very promising fillers in improving the dielectric and functional properties of nanocomposites [10]. In the medical sector, low dielectric permittivity values tend to produce higher characteristic impedance, increasing the reflection coefficient value [11]. To have a good value of reflection coefficient, high permittivity material is needed to enhance the properties of dielectric material for existing composite materials [12].…”

Section: Introductionmentioning

confidence: 99%

Innovative and Cost-Effective Fabrication Technique for Dielectric Composite Material

Nurfarhana Mustafa,

Syamimi Mardiah Shaharum,

Ahmad Afif Mohd Faudzi

et al. 2024

ARAM

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In this paper, the fabrication process of epoxy resin and nanocomposite barium titanate using a cost-effective apparatus is presented along with measurements of complex permittivity. The material is prepared by mixing epoxy resin and barium titanate powder which has high permittivity. Measurement of complex permittivity of materials is performed using a waveguide technique in the G-band with a frequency between 4 and 6 GHz. The results are then compared with the previous works that use advanced and precision instrumentation. The results indicate that the material’s permittivity, determined using our proposed technique, performs admirably. Specifically, at a frequency of 5 GHz, the permittivity is 7.32 with a loss tangent of 0.025 for a filler concentration of 20%. These values not only meet but also closely match those obtained with high-end equipment. Therefore, the proposed technique could be a good potential as an alternative technique for dielectric material preparation which is suitable to be used as a substrate antenna.

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Cured epoxy resin dielectric characterization based on accurate waveguide technique

Cited by 8 publications

References 14 publications

Fabrication of Cellulose Powder Dielectric Composite Material using Pineapple Leaves Fiber

Fabrication of Cellulose Powder Dielectric Composite Material using Pineapple Leaves Fiber

Analysis and Design of Wide Band 28/38 GHz Antenna Array Integrated with 3D printed Dielectric Lens For 5G Automotive Applications

Innovative and Cost-Effective Fabrication Technique for Dielectric Composite Material

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