| 摘要 |
Sensor assemblies used to detect the proximity of a material to a microwave element are disclosed. One example sensor assembly includes a signal generator configured to generate at least one microwave signal, a coupler connected to the signal generator, a microwave element coupled to the coupler, and a processing module connected to the coupler. The microwave element is configured to generate an electromagnetic field as a function of said at least one microwave signal. The microwave element is structured to reflect a loading signal to said coupler when a material interacts with the electromagnetic field. The processing module is configured to process the loading signal with a reference signal to generate a data signal representative of the proximity of the material to the microwave element. The data signal defines a sub-microwave frequency.
|
