Patent attributes
A pressure sensor assembly and pressure sensing method include a first receive antenna array configured to receive a first signal at a first frequency, a second receive antenna array configured to receive a second signal at a second frequency that differs from the first frequency, and a diode coupled to the first receive antenna array and the second receive antenna array. The diode is configured to receive the first signal at the first frequency and the second signal at the second frequency and output a third signal at a third frequency that is a difference between the first frequency and the second frequency. A transmit antenna array is coupled to the diode. The transmit antenna array is configured to receive the third signal at the third frequency and output the third signal at the third frequency.
