Complex permittivity and moisture measurements of oil palm fruits using an open-ended coaxial sensor

Abbas, Zulkifly; You, Kok Yeow; Shaari, Abdul Halim; Khalid, Kaida; Hassan, Jumiah; Saion, Elias

doi:10.1109/jsen.2005.859249

Cited by 57 publications

(26 citation statements)

References 6 publications

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“…In this work, the dielectric mixture model was used to calculate the permittivity for given moisture content values based on the relationship [4] √…”

Section: Theorymentioning

confidence: 99%

RDWG technique of determination of moisture content in Oil Palm Fruits

Abbas

Mokhtar

Khalid

et al. 2007

Eur. Phys. J. Appl. Phys.

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Abstract. Both the reflection and transmission coefficients of oil palm fruits of various moisture contents have been measured using a rectangular dielectric waveguide (RDWG) technique in the frequency range between 8 GHz and 12 GHz. Good agreement between predicted and measured values of reflection coefficient suggests the potential of RDWG technique as a new, fast and accurate method for the determination of moisture content in oil palm fruits.PACS. 84.40.-x Radiowave and microwave (including millimeter wave) -41.20

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“…In this work, the dielectric mixture model was used to calculate the permittivity for given moisture content values based on the relationship [4] √…”

Section: Theorymentioning

confidence: 99%

RDWG technique of determination of moisture content in Oil Palm Fruits

Abbas

Mokhtar

Khalid

et al. 2007

Eur. Phys. J. Appl. Phys.

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“…For characterizing liquids or semi-solids, the reflection only transmission line methods have also been used, where the open ended coaxial probe is inserted into the liquid test specimen. This method, however, requires complex calibration process, and is not well suited for solids, especially for thin specimens having low losses, as the overall procedure here assumes the test sample to be semi-infinite having virtually no air gap between the probe and the surface of the sample [6].…”

Section: Introductionmentioning

confidence: 99%

Design of a Coplanar Sensor for RF Characterization of Thin Dielectric Samples

2013

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A multilayered conductor backed coplanar waveguide (MCCPW) sensor for the non-destructive characterization of thin dielectric samples in the RF and microwave frequency band is designed and developed. The newly designed sensor allows the measurement of complex permittivity of thin dielectric samples over a wide frequency band in a non-destructive way as it does not require any special sample preparation except for the fact that the surface of the test sample should be flat for good contact with the coplanar waveguide. The overall procedure is based on the measurement of scattering parameters of the test specimen placed at the top of the designed coplanar sensor in the specified frequency band using the vector network analyzer. The measured scattering data are then employed to compute the effective permittivity of the coplanar (MCCPW) structure using the revised form of the reflection-transmission approach. From the practical point of view, the advantage of the proposed technique is that it employs only two SMA to coplanar end launchers in lieu of the expensive microwave probe stations commonly being used in the past for carrying out such kinds of measurements. The applicability of the designed sensor is tested by extracting the permittivity of a number of reference samples from both the simulated and the experimental data.

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“…However, for the characterization of liquids, this approach has quite often been used as the reflection only method based on the open ended coaxial probe, which is sold by few companies and is usually an expensive device, which works by inserting the probe directly into the liquid test specimen [5]. This method, however, requires complex calibration process, and the test sample comes into direct contact with the probe making this procedure difficult for viscous liquids as there is a danger of getting the probe damaged.…”

Section: Introductionmentioning

confidence: 99%

Microwave coplanar sensor system for detecting contamination in food products

Shaji

Akhtar

2013

IEEE MTT-S International Microwave and RF Conference

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A novel microwave coplanar sensor system for detecting contamination in food products such as milk and oil etc., is designed and developed. The developed system is fully non-invasive and non-destructive, which requires the test liquid to be filled into a disposable container. The sensor placed above the liquid filled container is connected to the network analyzer through appropriate RF connectors to measure the scattering coefficients of the test fluid over a designated frequency band. The dielectric properties of the adulterated specimen are determined in terms of the measured scattering data, and these values are compared with the dielectric data of standard samples in order to find the level of contamination.

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Complex permittivity and moisture measurements of oil palm fruits using an open-ended coaxial sensor

Cited by 57 publications

References 6 publications

RDWG technique of determination of moisture content in Oil Palm Fruits

RDWG technique of determination of moisture content in Oil Palm Fruits

Design of a Coplanar Sensor for RF Characterization of Thin Dielectric Samples

Microwave coplanar sensor system for detecting contamination in food products

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