| 摘要 |
This disclosure describes various embodiments of apparatuses, systems, and methods for wireless sensing. In some embodiment, a first signal comprising a first frequency f1 and a second signal comprising a second frequency f2 are used as interrogating signals. A third signals comprising a third frequency f3 is generated with an object, and a measurement of the object is determined based on the third signal. Frequency f3 is determined by formula f3=m×f1+n×f2, where m, n are real numbers (positive, negative, or zero). In particular, the third signal may be emitted at one or more of the harmonic frequencies associated with the frequencies of the first and/or the second signal. In some embodiments, a first signal comprising a first frequency is used as an interrogating signal, and a second signal comprising a frequency different from the first frequency is generated by a sensing device exposed to an object, the sensing device comprising a nonlinear transistor. A measurement of the object is then determined based on the second signal. |
