| 摘要 |
An aspect of the invention concerns a method of determining the permittivity of a substance using a probe having known dielectric characteristics, a planar end surface normal to the axis of the probe, a signal source, and a signal receiver. In this aspect, the method is carried out by contacting the substance with the planar end surface of said probe to form an interface between the probe and the substance. The method further involves measuring the reflection coefficient of the substance by (1) transmitting a signal through the probe to the interface, (2) receiving the signal reflected from the interface, and (3) comparing said transmitted and reflected signals, and then calculating the permittivity of said substance from the reflection coefficient as so measured. Another aspect of the invention concerns a method of heating a substance, such as bituminous froth, by determining the permittivity of a substance, and providing a radiation source physically and electrically spaced from the substance, with the radiation source having an impedance approximating the complex conjugate impedance of the substance.
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