Noncontact Wideband Current Probes With High Sensitivity and Spatial Resolution for Noise Location on PCB

Yan, Zhaowen; Liu, Wei; Wang, Jianwei; Su, D.; Yan, Xin; Fan, Jun

doi:10.1109/tim.2018.2830859

Cited by 38 publications

(18 citation statements)

References 21 publications

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“…Its ultra-compact size, added to the all-dielectric composition, makes it suitable for applications where the distortion of the E-field is critical, in presence of intense fields or when EM-invisible or safe probe, non-inductive, are required. However, this probe is extremelly suitable when high spatial resolution and large bandwidth performances are required being interesting for applications in printed circuit board (PCB) industry where electric components tend to be more compact and the signals, higher in frequency 60 . The Fano fibered-sensor probe may go beyond the limits that the actual probes present.…”

Section: Resultsmentioning

confidence: 99%

An ultra wideband-high spatial resolution-compact electric field sensor based on Lab-on-Fiber technology

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Suárez

Salut

et al. 2019

Sci Rep

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Non-intrusive, wide bandwidth and spatial resolution are terms often heard in electric field sensing. Despite of the fact that conventional electromagnetic field probes (EMF) can exhibit notable functional performances, they fail in terms of perturbation of the E-field due to their loaded metallic structure. In addition, even though electro-optical technology offers an alternative, it requires large interaction lenghts which severely limit the sensing performances in terms of bandwidth and spatial resolution. Here, we focus on miniaturizing the interaction volume, photon lifetime and device footprint by taking advantage of the combination of lithium niobate (LN), Lab-on-Fiber technologies and photonic crystals (PhC). We demonstrate the operation of an all-dielectric E-field sensor whose ultra-compact footprint is inscribed in a 125 μm-diameter circle with an interaction area smaller than 19 μm × 19 μm and light propagation length of 700 nm. This submicrometer length provides outstanding bandwidth flatness, in addition to be promising for frequency detection beyond the THz. Moreover, the minituarization also provides unique features such as spatial resolution under 10 μm and minimal perturbation to the E-field, accompanied by great linearity with respect to the E-field strength. All these specifications, summarized to the high versatibility of Lab-on-Fiber technology, lead to a revolutionary and novel fibered E-field sensor which can be adapted to a broad range of applications in the fields of telecommunications, health and military.

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Section: Resultsmentioning

confidence: 99%

An ultra wideband-high spatial resolution-compact electric field sensor based on Lab-on-Fiber technology

Calero

Suárez

Salut

et al. 2019

Sci Rep

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“…To the best of the Authors' knowledge, available electric near-field probes possibly suitable for EM susceptibility investigation can be grouped into two main categories: (a) PCB-based probes (see Fig. 1(a)) [5], [8]; and (b) semi-rigid coaxial cable probes (see Fig. 1(b)) [3], [13], [15], [16].…”

Section: Characteristics Of Immunity Tests and Injection Probesmentioning

confidence: 99%

“…Moreover, the obtained EM-field maps can be post-processed, e.g., reconstructed by equivalent surface dipoles, and then used as the interference source for numerical simulation of complex systems, [2]. To this end, the electric and/or magnetic field distribution above the circuit under test is measured by the use of near-field probes (e.g., semi-rigid coaxial cables or PCB-based probes [3]- [8]) assuring high sensitivity to local EM field components and spatial resolution. These characteristics make these probes attractive also as injection devices for immunity testing.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Semi-Rigid Coaxial Test Probes as RF Injection Devices for Immunity Tests at PCB Level

Grassi

Spadacini

et al. 2020

IEEE Access

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This work investigates the performance of RF immunity procedures exploiting semi-rigid coaxial test probes as coupling devices to inject continuous wave (CW) RF power into the outlets of Integrated Circuits (ICs). Two solutions are presented, both offering the advantage with respect to the traditional direct power injection method, to run the test without removing the IC from its actual PCB. The first procedure resorts to near-field coupling to inject the noise into an interconnecting trace. The second procedure requires metallic contact between the probe tip and the injection point (e.g., a via or an IC pin). Specific figures of merit, such as coupling and power efficiency, test repeatability and intrusiveness, sensitivity to setup parameters and lateral spatial resolution, are introduced and used to ascertain the effectiveness of the proposed procedures. To this end, both numerical simulations and measurements were carried out on several PCBs. Feasibility of the proposed immunity procedures is eventually proven by an application example, involving a thermal sensor as device under test. INDEX TERMS Direct power injection, Microstrip line, Near-field probe, Radiated Immunity, Radio Frequency.

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“…Therefore, the simulations in full-wave tools lack sufficient conditions. The research on the source reconstruction has become more attractive [1].…”

Section: Introductionmentioning

confidence: 99%

An Improved Equivalent Dipole Moment Source Model Based on Regularization Optimization Method for Near Field-Far Field Conversion

et al. 2020

Self Cite

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The radiation emission from high-speed digital circuit may result in radio-frequency interference (RFI) problems in modern electronic devices. In this paper, an improved equivalent dipole source based on a new transfer model and a new regularization method is proposed. The equivalent source is obtained by solving an inverse equation with near-field data. The tangential component of electric field used in conventional equivalent source extraction is replaced by the normal component, which can reduce the test difficulty and enhance the measurement efficiency. The new regularization method based on Tikhonov and truncated singular value decomposition (TSVD) can enhance the stability and accuracy of the dipole solution. In addition, the new transfer model and regularization method are verified by simulations and measurements.

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Noncontact Wideband Current Probes With High Sensitivity and Spatial Resolution for Noise Location on PCB

Cited by 38 publications

References 21 publications

An ultra wideband-high spatial resolution-compact electric field sensor based on Lab-on-Fiber technology

An ultra wideband-high spatial resolution-compact electric field sensor based on Lab-on-Fiber technology

Investigation of Semi-Rigid Coaxial Test Probes as RF Injection Devices for Immunity Tests at PCB Level

An Improved Equivalent Dipole Moment Source Model Based on Regularization Optimization Method for Near Field-Far Field Conversion

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