Collocated and Simultaneous Measurements of RF Current and Voltage on a Trace in a Noncontact Manner

Luo, Chengyang; Fang, Wenxiao; Shen, Yang; Qiu, Haimi; Shao, Weiheng; Hong, Ziyang; Wang, Lei; He, Zhiyuan; En, Yunfei

doi:10.1109/tmtt.2019.2905204

Cited by 16 publications

(5 citation statements)

References 36 publications

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“…2(a), give rise to a parasitic capacitance of 𝐶 𝐶 = 70pF . These parameters, upon substituted to (7), gives rise to a damping ratio ζH for each chosen damping resistance Rs. The final chosen damping parameters are 𝑅 𝑆 = 120 Ω and 𝜁 𝐻 = 0.986 to provide a fully damped coil characteristic for easier cancellation by the shaper.…”

Section: ⅳ Experimental Resultsmentioning

confidence: 99%

“…One limitation is the lowering of bandwidth below a certain resonant frequency, which for a Rogowski coil, has commonly been solved by reducing its number of turns or size. For example, in [7], a single-turn coil has been proven to have a bandwidth as high as 1 GHz. It is however at the expense of a smaller, and hence less accurate, signal-to-noise ratio.…”

Section: Introductionmentioning

confidence: 99%

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Extended Wide-Bandwidth Rogowski Current Sensor With PCB Coil and Electronic Characteristic Shaper

Xin

et al. 2021

IEEE Trans. Power Electron.

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Because of their fast switching speeds, current measurements for wide band-gap (WBG) devices have become increasingly challenging. Particularly, the designed current sensor must be nonintrusive and have a small size and a very wide bandwidth. One promising current sensor is the printed-circuitboard (PCB) Rogowski current sensor, whose bandwidth is wide only if parasitic parameters of its measuring coil are minimized prominently. This is presently achieved by reducing the number of turns of the coil, which undesirably will degrade its signal-to-noise ratio. Alternatively, an electronic characteristic shaper proposed in this letter can be used for neutralizing parasitic effects, while performing integration to restore the measured current. Theoretical analyses and experimental results have shown that the resulting Rogowski current sensor does indeed have a wider bandwidth, even without changing its measuring coil.

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Section: ⅳ Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extended Wide-Bandwidth Rogowski Current Sensor With PCB Coil and Electronic Characteristic Shaper

Xin

et al. 2021

IEEE Trans. Power Electron.

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“…on a PCB [71], [131]- [134]. In fact, in [2], [135], the extreme of using a single-turn coil has been tried with a GaN device, whose fast switching requires a bandwidth as high as a few hundred MHz. Being only one turn also smoothens integration, like demonstrated in [2], where its pick-up coil has been integrated in its power loop for DPT.…”

Section: E Rogowski Coil Current Sensormentioning

confidence: 99%

A Review of Megahertz Current Sensors for Megahertz Power Converters

Xin

Liu

et al. 2022

IEEE Trans. Power Electron.

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Within a power converter, multiple currents are usually measured for control, protection, and/or monitoring. They are therefore important sources of information, which must unquestionably be measured accurately to maintain continuous and reliable operation of the power converter. Accurate current measurement has however become tougher with the introduction of wide band-gap (WBG) devices with switching frequency tending towards the Megahertz (MHz) range. Because of that, the installed current sensors must have a significantly widened bandwidth. Moreover, they must be nonintrusive and compact, in order not to degrade fast switching characteristics and high power density of the WBG converter. Presently, these features are not collectively obtainable from existing commercial current sensors. Consequently, many new current sensing techniques have surfaced in the literature for usage with the more demanding MHz power converter. These new techniques, some classical techniques, and their hybrid integrations are now reviewed, after overviewing functionalities made possible by current sensors in a power converter. Last but importantly, some future developmental trends aimed at matching MHz current sensors with MHz power converters are described, before concluding the paper.

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“…Certainly, the common materials, PCB, can be applied for multi-sensor structures in terms of multi layers, as shown in Figure 4a, which also gives textile UHF-RFID sensors a novel research orientation towards multi-layer structures with flexible and comfortable features. [45]); (b) UHF-RFID tag with polyimide substrate (adapted from [40]); (c) UHF-RFID tag with 50% cotton and 50% polyester substrate (adapted from [44]).…”

Section: Materials Of Substratesmentioning

confidence: 99%

“… Three typical materials of the substrates. ( a ) Voltage and current sensor with FR4 substrate (adapted from [ 45 ]); ( b ) UHF-RFID tag with polyimide substrate (adapted from [ 40 ]); ( c ) UHF-RFID tag with 50% cotton and 50% polyester substrate (adapted from [ 44 ]). …”

Section: Figurementioning

confidence: 99%

Wearable Textile UHF-RFID Sensors: A Systematic Review

2020

Self Cite

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Textile radio-frequency identification operating in ultra-high frequency (UHF-RFID) sensors based on different scenarios are becoming attractive with the forthcoming internet of things (IoT) era and aging society. Compared with conventional UHF-RFID sensors, textile UHF-RFID sensors offer the common textile features, light weight, washability and comfort. Due to the short time and low level of development, researches on the integration of textile UHF-RFID techniques and textile sensing techniques are not flourishing. This paper is motivated by this situation to identify the current research status. In this paper, we provide a systematic review of the fundamentals of textile UHF-RFID sensors techniques, materials, the brief history and the state-of-the-art of the scenario-based development through detailed summary and analysis on the achievements from the starting year of 2004 to the present time. Moreover, according to the analysis, we give a proposal of the future prospects in several aspects, including the new materials and manufacturing processes, machine learning technology, scenario-based applications and unavoidable reliability.

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Collocated and Simultaneous Measurements of RF Current and Voltage on a Trace in a Noncontact Manner

Cited by 16 publications

References 36 publications

Extended Wide-Bandwidth Rogowski Current Sensor With PCB Coil and Electronic Characteristic Shaper

Extended Wide-Bandwidth Rogowski Current Sensor With PCB Coil and Electronic Characteristic Shaper

A Review of Megahertz Current Sensors for Megahertz Power Converters

Wearable Textile UHF-RFID Sensors: A Systematic Review

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