ABSTRACT Oil industry in Canada obtains important amount of oil from oil sands resources. Current... more ABSTRACT Oil industry in Canada obtains important amount of oil from oil sands resources. Current extraction method of bitumen is a high cost process and might have also some negative environmental impact. Microwave energy applicators by heating oil sands at microwave frequencies can be an excellent alternative to extract bitumen if microwave energy technique brings the advantages of being cost-effective and environmental friendly method of extraction. In order to design and manufacture a microwave energy applicator, its dielectric characteristic must be known. In this study, the complex permittivity of oil sands was measured by using rectangular cavity resonator, designed and fabricated in École Polytechnique de Montréal laboratories, at ISM 2.45 GHz.
Two methods for simulating microwave and millimeter-wave nonlinear circuits are presented. The st... more Two methods for simulating microwave and millimeter-wave nonlinear circuits are presented. The steps required for large signal microwave MESFET modeling are described. The time-domain analysis method is briefly presented; its important advantage is that it allows transient states study. The second method based on the harmonic balance technique makes it possible to quickly obtain the steady-state regime of a nonlinear microwave circuit. Procedures required in MESFET modeling also described. Small signal measurements are used to obtain the linear model and large signal measurements are used to obtain the intrinsic nonlinear parameters of the transistor, which makes it possible to deduce the nonlinear model. Simulation and modeling results are presented.
ABSTRACT Oil industry in Canada obtains important amount of oil from oil sands resources. Current... more ABSTRACT Oil industry in Canada obtains important amount of oil from oil sands resources. Current extraction method of bitumen is a high cost process and might have also some negative environmental impact. Microwave energy applicators by heating oil sands at microwave frequencies can be an excellent alternative to extract bitumen if microwave energy technique brings the advantages of being cost-effective and environmental friendly method of extraction. In order to design and manufacture a microwave energy applicator, its dielectric characteristic must be known. In this study, the complex permittivity of oil sands was measured by using rectangular cavity resonator, designed and fabricated in École Polytechnique de Montréal laboratories, at ISM 2.45 GHz.
Two methods for simulating microwave and millimeter-wave nonlinear circuits are presented. The st... more Two methods for simulating microwave and millimeter-wave nonlinear circuits are presented. The steps required for large signal microwave MESFET modeling are described. The time-domain analysis method is briefly presented; its important advantage is that it allows transient states study. The second method based on the harmonic balance technique makes it possible to quickly obtain the steady-state regime of a nonlinear microwave circuit. Procedures required in MESFET modeling also described. Small signal measurements are used to obtain the linear model and large signal measurements are used to obtain the intrinsic nonlinear parameters of the transistor, which makes it possible to deduce the nonlinear model. Simulation and modeling results are presented.
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Papers by Fadhel Ghannouchi