초록 ▼

Apparatus, and related method, for remotely measuring at 1east one environmental condition includes an electromagnetically resonant sensor having a measurable resonance characteristic (e.g., center resonance frequency, quality factor, or bandwidth) that varies in correspondence to changes in the env

Apparatus, and related method, for remotely measuring at 1east one environmental condition includes an electromagnetically resonant sensor having a measurable resonance characteristic (e.g., center resonance frequency, quality factor, or bandwidth) that varies in correspondence to changes in the environmental condition present at the sensor. The sensor emits an electromagnetic return signal representative of a state of the resonance characteristic when an electromagnetic excitation signal impinges on the sensor. The electromagnetic excitation signal is generated by a generator located separate and away from the sensor, and the excitation signal is then directed at the remote sensor. The sensor thus remotely detects and measures the environmental condition. In one embodiment, the sensor is an electromagnetically resonant electrical circuit. In another embodiment, the sensor is an antenna resonator (e.g., a half-wavelength antenna) made of a conductive material.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus for remotely measuring at least one environmental condition, comprising:an electromagnetically resonant sensor having a resonance frequency which varies as a result of at least one physical change to the sensor, the at least one physical change being due to one

[ What is claimed is:] [1.] Apparatus for remotely measuring at least one environmental condition, comprising:an electromagnetically resonant sensor having a resonance frequency which varies as a result of at least one physical change to the sensor, the at least one physical change being due to one or more changes in the at least one environmental condition, the sensor emitting an electromagnetic return signal having a frequency at or near the resonance frequency when an electromagnetic excitation signal having a frequency at or near the resonance frequency impinges on the sensors; andan electromagnetic excitation signal generator which is separated from the sensor and located away from the sensors and which generates the electromagnetic excitation signal having the frequency at or near the resonance frequency.