Effect of Aspect Ratio and Frequency of an Open-Ended, Coaxial Line on Admittance for Determination of Moisture in Tenera Oil Palm Fruit Using Finite Difference Method

Authors

  • E. M. Cheng 1 School of Mechatronic Engineering, University Malaysia Perlis (UniMAP) Pauh Putra Campus, 02600 Arau, Perlis, Malaysia ,2 Bioelectromagnetic Research Group (BioEM), University Malaysia Perlis (UniMAP) Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
  • Z. Abbas Physics Department, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia
  • Mohamedfareq Abdulmalek Faculty of Engineering and Information Sciences, University of Wollongong in Dubai Dubai Knowledge Village, Dubai, United Arab Emirates
  • K. Y. You School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia Skudai, Johor 81310, Malaysia
  • K. Y. Lee Lee Kong Chian Faculty of Engineering & Science, Tunku Abdul Rahman University Sungai Long Campus, Jalan Sungai Long, Sungai Long City, Cheras, 43000 Kajang, Selangor, Malaysia
  • N. F. Mohd Nasir School of Mechatronic Engineering, University Malaysia Perlis (UniMAP) Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
  • M. S. Abdul Majid School of Mechatronic Engineering, University Malaysia Perlis (UniMAP) Pauh Putra Campus, 02600 Arau, Perlis, Malaysia
  • S. F. Khor School of Electrical Systems Engineering, Univerisiti Malaysia Perlis (UniMAP) Pauh Putra Campus, Arau, Perlis 02600, Malaysia

Keywords:

Conductance, finite difference method, moisture content, normalized admittance, oil palm fruit, open-ended coaxial sensor, susceptance

Abstract

This paper intends to study the effect of variations of aspect ratio (the ratio of outer radius to inner radius of conductor) and frequency to the normalized admittance (normalized conductance and susceptance) of oil palm fruit with various moisture content (MC) on performance of RG405/U semi-rigid cable (open-ended coaxial line). Both finite difference method (FDM) and quasi-static model (admittance model) were used to compare response of normalised conductance and susceptance due to 30%, 40%, 60%, 70% and 80% of moisture content that explain all ripeness stage of oil palm fruit. Finite difference method is used to simulate complex admittance due to different MC in oil palm fruit in various ripeness. The FDM results were then compared with the quasi-static model through error analysis. The aspect ratio of 3.298 has smaller error of normalized conductance when frequency range <3 GHz.

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Published

2021-07-18

How to Cite

[1]
E. M. Cheng, “Effect of Aspect Ratio and Frequency of an Open-Ended, Coaxial Line on Admittance for Determination of Moisture in Tenera Oil Palm Fruit Using Finite Difference Method”, ACES Journal, vol. 33, no. 11, pp. 1308–1318, Jul. 2021.

Issue

2018: Vol 33 Iss 11

Section

Articles