Coupling-Independent Real-Time Wireless Resistive Sensing Through Nonlinear<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mrow><mml:mi mathvariant="script">P</mml:mi><mml:mi mathvariant="script">T</mml:mi></mml:mrow></mml:math>Symmetry
Siavash Kananian, George Alexopoulos, Ada S.Y. Poon
Abstract
We report the realization of coupling-independent, robust wireless sensing of fully passive resistive sensors. $\mathcal{P}\mathcal{T}$-symmetric operation obviates sweeping, permitting real-time, single-point sensing. Self-oscillation is achieved through a fast-settling nonlinearity whose voltage amplitude is proportional to the sensor's resistance. These advances markedly simplify the reader. A dual time-scale theoretical framework generalizes system analysis to arbitrary operating conditions and a correction strategy reduces errors due to detuning from $\mathcal{P}\mathcal{T}$-symmetric conditions by an order of magnitude.
Topics & Concepts
Resistive touchscreenRealization (probability)Computer scienceWirelessNonlinear systemElectronic engineeringAmplitudeVoltageDual (grammatical number)Electrical engineeringControl theory (sociology)PhysicsQuantum Mechanics and Non-Hermitian PhysicsMechanical and Optical ResonatorsControl and Stability of Dynamical Systems