Designing cantilever dimension for low power wireless applications

Awal, Rabiul; Jusoh, M.; Ahmad, R. Badlishah; Sabapathy, Thennarasan; Yasin, Mohd Najib Mohd; Mat, M.H.

doi:10.11591/ijeecs.v14.i2.pp758-764

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…The reason to keep the transmitter in circular shape is to use the benefit of the directional acoustic beams. Also, a rectangular configuration is more beneficial as receiver [18]. The transmitter and receiver are depicted in Fig.…”

Section: Modelling In Finite Element Analysismentioning

confidence: 99%

Acoustic Wave Propagation in High Scale Impedance Mismatch Mediums

Awal

Jusoh

Yahya

et al. 2021

IIUMEJ

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A finite element analysis of acoustic propagation in a multilayered medium is presented in this paper. A circular transmitter (diameter 14 mm, thickness 3 mm) and a rectangular receiver (20×10×0.5 mm3) are set to detect the variations in the propagation pattern. A complex medium (70×40×60 mm3) composed of skin, fat, muscle, bone and liquid is designed in a simulated environment. A scale of frequencies (10 kHz to 2 MHz) is applied to trace the impact on the propagation pattern as well. It is found from the analysis that fat and liquid layers affect the acoustic propagation the most (-69 dB), which results in a significant drop in the received sound pressure level at the receiving end. Again, other than skin and fat layers, low frequencies (less than 1 MHz) are more beneficial in terms of sound pressure level. However, higher frequencies contribute to lower displacements at the receiving end, which will cause less power potential as well. ABSTRAK: Analisis elemen terhingga bagi penyebaran akustik dalam medium berlapis dibentangkan dalam kajian ini. Pemancar bulat (diameter 14 mm, ketebalan 3 mm) dan penerima segi empat tepat (20 × 10 × 0.5 mm3) diatur bagi mengesan perubahan pola penyebaran. Medium kompleks (70 × 40 × 60 mm3) yang terdiri daripada kulit, lemak, otot, tulang dan cecair direka dalam persekitaran simulasi. Skala frekuensi (10 kHz hingga 2 MHz) digunakan bagi mengesan corak penyebaran. Dapatan kajian menunjukkan bahawa lapisan lemak dan cecair mempengaruhi penyebaran akustik (-69 dB), yang mengakibatkan penurunan mendadak tahap penerimaan tekanan bunyi di hujung penerima. Selain lapisan kulit dan lemak, frekuensi rendah (kurang dari 1 MHz) adalah lebih berguna dari segi tahap tekanan suara. Walau bagaimanapun, frekuensi lebih tinggi menyebabkan kurang anjakan di hujung penerima, sekaligus mengurangkan potensi daya tenaga.

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Section: Modelling In Finite Element Analysismentioning

confidence: 99%

Acoustic Wave Propagation in High Scale Impedance Mismatch Mediums

Awal

Jusoh

Yahya

et al. 2021

IIUMEJ

Self Cite

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“…The reason to keep the transmitter in a circular shape is to use the benefit of the directional acoustic beams. Also, a rectangular configuration is more beneficial as a receiver [7]. The transmitter and receiver are depicted in Figure 1.…”

Section: Modeling Of Transmitter Receiver and Mediums In Finite Element Analysismentioning

confidence: 99%

Impact of THz Frequency on Underwater Acoustic Wave Propagation for Short Range Wireless Applications

Awal

Yahya

Afrizal

et al. 2021

CFDL

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Acoustic propagation in seawater is an important aspect of scientific investigation. However, the impact of the THz scale frequencies for acoustic propagation is not included in the studies. Thus, a finite element analysis of such propagation in a seawater medium is presented in this paper applying THz frequencies. A transmitter (circular with a diameter of 14 mm, a thickness of 3 mm) and a rectangular receiver (20×10×0.5 mm3) are designed to trace the variations in the propagation mediums. A propagation medium of seawater (70×40×60 mm3) with ice and softwood is modelled. A scale of frequencies (1 kHz to 1 THz) is applied to trace the impact on the propagation pattern. It is found that THz range frequencies provide a very small wavelength. As a result, the potential propagation distance is very small. As such, the sound pressure level, displacements of the receiver and pressure field shows very rapid drops in the magnitude. This work considers only 70 mm as propagation distance, yet the sharp decrement of performance parameters suggests that it is rather inconvenient to achieve useful efficiency using THz frequencies for acoustic propagation.

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