Frequency Splitting and Transmission Characteristics of MCR-WPT System Considering Non-Linearities of Compensation Capacitors

Liu, Jun; Wang, Chang; Wang, Xiaofeng; Ge, Weimin

doi:10.3390/electronics9010141

Cited by 2 publications

(1 citation statement)

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“…However, when operating on resonance, the coupling can become especially sensitive to position 25 and result in a strong-coupling regime. This causes a frequency splitting of the WPT transfer function away from the resonant operating frequency, ω 0 , and thus overall performance is reduced 26 . Experimentally, this strong-coupling regime was demonstrated on a resonant circuit with our coplanar DEP device by sweeping the operating frequency at several distances of separation between the coils, see Fig.…”

Section: Resultsmentioning

confidence: 99%

Wireless dielectrophoresis trapping and remote impedance sensing via resonant wireless power transfer

et al. 2023

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Nearly all biosensing platforms can be described using two fundamental steps—collection and detection. Target analytes must be delivered to a sensing element, which can then relay the transduced signal. For point-of-care technologies, where operation is to be kept simple, typically the collection step is passive diffusion driven—which can be slow or limiting under low concentrations. This work demonstrates an integration of both active collection and detection by using resonant wireless power transfer coupled to a nanogap capacitor. Nanoparticles suspended in deionized water are actively trapped using wireless dielectrophoresis and positioned within the most sensitive fringe field regions for wireless impedance-based detection. Trapping of 40 nm particles and larger is demonstrated using a 3.5 VRMS, 1 MHz radiofrequency signal delivered over a distance greater than 8 cm from the nanogap capacitor. Wireless trapping and release of 1 µm polystyrene beads is simultaneously detected in real-time over a distance of 2.5 cm from the nanogap capacitor. Herein, geometric scaling strategies coupled with optimal circuit design is presented to motivate combined collection and detection biosensing platforms amenable to wireless and/or smartphone operation.

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Section: Resultsmentioning

confidence: 99%