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In this work, the performances which are the reflection loss and absorption for composite of sugarcane bagasse (SCB) and rubber tire dust as microwave absorber were investigated in the range frequency of 8.2-12.4 GHz (X-Band). Sugarcane bagasse (SCB) is one of the major agricultural wastes. This residue agricultural waste material has potential to be used as an alternative material for microwave absorber in Radio Frequency (RF) anechoic chamber. Rubber tire dust is one of the residues from tire wear. This paper shows the method about how the sample which is the composite of sugarcane bagasse with rubber tire dust was fabricated and the measurement to get the reflection loss (S11) and transmission coefficient (S21). The thickness of the sample is 5 mm. The methodologies included in this work are defining the dielectric properties and measurement of the samples using transmission line technique (waveguide). The dielectric constant, ε' from the transmission line measurement of the composite of sugarcane bagasse-rubber tire dust is 3.35. The S11 results showed that the SCB-rubber tire dust composite absorber was found to be better which means lower than -10 dB. The results proved that SCB-rubber tire dust was a good alternative to be used as microwave absorber. The goal of this investigation is to have the better electromagnetic reflection (S11) which is less that -10 dB with the usage of the new agricultural waste such as sugarcane bagasse (SCB) and rubber tire dust. These can help save the nature and environmental friendly. [ABSTRACT FROM AUTHOR]

This paper focuses on the determination of the degree of the emulsion for the water-in-palm oil mixture. The degree of emulsion of the mixture is dependent on the properties of dielectric constant. The dielectric properties of the mixtures were measured using Agilent dielectric probe with frequencies ranging from 1 GHz to 18 GHz. Two types of mixture rules were discussed and respectively used in the modeling of the dielectric properties of both crude palm oil and crude kernel palm oil. The macroscopic analysis on the mechanisms occurs in both water-palm oil mixtures were carried out and discussed in detail. [ABSTRACT FROM AUTHOR]

A dual open ended coaxial sensor system to determine complex permittivity was studied in detail. This paper focuses on determination of a reflection coefficient phase from two magnitudes using modified capacitance model from 300 kHz to 8 GHz. The phase information can then be used for calculation of the sample's complex permittivity. Factors such as range and limitation of the model, sample's permittivity, operating frequency, and size of sensor were investigated. Sensitivity of calculated phase with respect to small changes in measured magnitude was carried out. [ABSTRACT FROM PUBLISHER]

This paper describes a novel permittivity measurement technique using dual open ended coaxial sensors. The magnitudes of the reflection coefficient from two open ended coaxial sensors were used to determine complex reflection coefficients and permittivity of a sample under test. [ABSTRACT FROM AUTHOR]