Noncontact RF Voltage Sensing of a Printed Trace via a Capacitive-Coupled Probe

Fang, Wenxiao; Qiu, Haimi; Luo, Chengyang; Wang, Lei; Shao, Weiheng; Shao, E; Li, Shajin; En, Yunfei

doi:10.1109/jsen.2018.2869908

Cited by 40 publications

(7 citation statements)

References 23 publications

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“…To prove that the temperature rise is due to the electric field concentrated on the center of the target, we experimentally measure the electric field inside the target material by using a coaxial probe and a VNA [18]. Fig.…”

Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Significant Reduction of Resonant Frequency by Multi-Layered Dielectric Material-Loaded Coaxial Cavity for Microwave Heating

Han

Seo²,

Choi

2022

J Electromagn Eng Sci

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This paper presents a microwave heating method using a cavity whose size is much smaller than the free-space wavelength. The resonant frequency was reduced by inserting multi-layer dielectrics into the cavity, and an appropriate mode was generated in the cavity to heat a specific area inside it. High-permittivity dielectrics were used to make the cavity resonate in the frequency range of a few gigahertz. A formula for the resonant frequency of the multi-layer dielectric material-loaded cylindrical cavity was analytically derived. The frequency reduction by using a dielectric-loaded cylindrical cavity geometry was predicted from the derived formula, from 12.2 GHz to 4.6 GHz, whereas the experiment results showed a reduction from 10.8 GHz to 4.5 GHz. The analytical and the experiment results were compared and analyzed with simulations, which showed good agreement. The heating efficiency at the target in the multi-layered dielectric geometry was analyzed. The electric field inside the target material was measured to prove the temperature response of the microwave heating and was compared with the simulation result. This paper confirms a technical possibility of microwave heating of a smaller-sized cavity with an insertion of low-loss dielectric material in the vicinity of a heating target.

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Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Significant Reduction of Resonant Frequency by Multi-Layered Dielectric Material-Loaded Coaxial Cavity for Microwave Heating

Han

Seo²,

Choi

2022

J Electromagn Eng Sci

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“…27 (b). There is a maximal order union (6,28) of 0.16% corresponding to the sixth and 28 th marked point frequencies from left to right in Fig. 26 (b).…”

Section: Order Reduced Processing For Multi-sourcementioning

confidence: 97%

“…By considering both the completeness of frequency representation and symmetry of amplitudes unions, if and only if the reference frequency parameters satisfy (28), P × Q = 1.…”

Section: B Oi Of Spectrummentioning

confidence: 99%

“…The first situation is when the useful signal and crosstalk signal input the nonlinear circuits, the amplitude of the useful signal is usually known. The second situation is when the strong and weak signals input the nonlinear circuits, the amplitude of the strong signal can be measured with the online current or voltage measurement method in [27], [28]. Therefore, there are only N + 1 unknowns.…”

Section: The Proposed Approachmentioning

confidence: 99%

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A New Electromagnetic Emission Source Frequency and Factor Identification Approach for Nonlinear Circuits From the Output Spectrum Data

Yang

et al. 2020

IEEE Access

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For the practical nonlinear circuits, a number of new frequencies are generated in the output spectrum, which makes electromagnetic interference location quite challenging. To mitigate this problem, an approach is proposed to identify the electromagnetic emission source frequencies and nonlinear factors from the output spectrum of nonlinear circuits. The amplitude of the output spectrum with the input of two sine signals is first calculated based on the power series. Then, the Order Image (OI) is defined to reveal the output spectrum features, and its symmetry characteristic has been comprehensively analyzed. Results show that the maximum symmetry index is observed when the reference frequencies are equal to the excitation frequencies. Based on this observation, the electromagnetic emission source frequencies can be obtained. In addition, a Backward Algorithm (BA) has been introduced to extract nonlinear factors. The proposed approach only requires the output spectrum and the amplitude of one excitation. Compared with other techniques, like the Support Vector Machines and the Recurrent Neural Network, it needs much less prior information. Finally, several examples are carried out to verify the effectiveness of the proposed approach. Results show that the emission source frequencies and nonlinear factors can be accurately extracted. Therefore, the proposed approach shows great potential in electromagnetic interference location and characteristic analysis for nonlinear circuits. INDEX TERMS Electromagnetic emission sources, identification, nonlinear circuits, Order Image, power series.

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“…Several models in the literature are unsuited for such a specific purpose, since the involved near-field probes are used as field sensors, and the objective is to derive equivalent radiated emission sources from near-field measurement [14], [16], [17]. Conversely, if the probes are used for noise injection, probe-to-trace electric coupling can be either modeled through a coupling capacitance [18], [19], [20], or an induced source [5], [21] determined by local-field distribution and field-to-wire coupling [22]. However, these models are inherently influenced by the specific characteristics of both the near-field probe and the trace under test, and therefore developing a new probe model for every test setup is quite time consuming.…”

mentioning

confidence: 99%

Test Design Methodology for Time-Domain Immunity Investigations Using Electric Near-Field Probes

Grassi

Spadacini

et al. 2022

IEEE Trans. Electromagn. Compat.

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This work investigates the possibility to develop timedomain immunity tests using electric near-field probes, for flexible customization of broadband input waveforms injected into specific pins of PCBs. For this purpose, a test design methodology is proposed, which is based on circuit modelling of the injection mechanism on the one hand, and on pulse design and equalization on the other hand. Two circuit models are developed. The former employs measurement/simulation data along with port-reduction techniques to model noise injection through near-field probes by means of internal induced sources. Conversely, the latter model only includes passive components, and is derived starting from physical observation of the involved phenomena. Both models are compatible with circuit solvers and can be easily adapted for different traces under test. Since pulse-like noise is usually broadband, suitable stress waveforms are utilized to obtain different noise spectra. Also, in order to precisely control the shape of the waveform reaching the targeted pin, an equalization procedure is employed. These models and techniques can be easily applied to amplification systems originally designed for frequencydomain tests, thus providing a comprehensive solution for the design of broadband immunity tests in the time domain. The feasibility and accuracy of the proposed methodology are proved by full-wave simulations and measurements.

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Noncontact RF Voltage Sensing of a Printed Trace via a Capacitive-Coupled Probe

Cited by 40 publications

References 23 publications

Significant Reduction of Resonant Frequency by Multi-Layered Dielectric Material-Loaded Coaxial Cavity for Microwave Heating

Significant Reduction of Resonant Frequency by Multi-Layered Dielectric Material-Loaded Coaxial Cavity for Microwave Heating

A New Electromagnetic Emission Source Frequency and Factor Identification Approach for Nonlinear Circuits From the Output Spectrum Data

Test Design Methodology for Time-Domain Immunity Investigations Using Electric Near-Field Probes

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