Analysis on Monopole Antenna for Moisture Determination in Oil Palm Fruit Using Finite Difference Method

Cheng, E. M.; Abbas, Zulkifly; Samsuddin, H. A. Rahim; Lee, Kim Yee; You, Kok Yeow; Hassan, Jumiah; Zainuddin, Hishamuddin; Khor, Shing Fhan

doi:10.5370/jeet.2016.11.6.1754

Cited by 2 publications

(1 citation statement)

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“…Various microwave sensors, such as the coplanar sensor (Cheng et al 2016b), rectangular dielectric waveguide, microstrip sensor (Pongsuwan et al 2014;Jain et al 2016), open-ended rectangular waveguide (Staszek et al 2018), and monopole (Hazir et al 2012b) are used for the estimation of the maturity of oil palm fruits. The first method involving sensors for successful estimation of the M.C was carried out using attenuation measurements based microstrip and coplanar sensors.…”

Section: Introductionmentioning

confidence: 99%

Optimum design of a microstrip ring resonator sensor to determine the moisture content in oil palm fruits and seeds

Ahmad

Abbas

Abrass

et al. 2019

BioRes

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Oil palm fresh fruit bunch (OPFFB) is the main export product of the oil palm industry. A good oil palm is between 17 to 18 weeks of age with full fruitless maturity. An automated detection system should be implemented to determine the OPFFB’s maturity and expedite the harvesting process. Various automated detection methods have been proposed for conventional method replacement. In a preliminary study, a new oil palm fruit sensor was proposed for detecting the maturity of OPFFB, and a microstrip ring resonator was designed for determining the moisture content in oil palm fruit. The coaxial feeder of the microstrip ring was a Sub-Miniature A (SMA) stub contact panel with outer and inner conductors of 4.1 mm and 1.3 mm, respectively. The measurement system consisted of a sensor and a PC controlled network analyzer. This system was tested successfully on seeds and fruits of oil palm with various degrees of maturity. The microstrip ring resonator operated between 2.2 and 3 GHz and required low frequency that enabled the electromagnetic field in the first half of the ring resonator to be transferred to the second half and subsequently cause the collinearity of the maximum field points in the feed lines and resonator.

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