Probe calibration by using a different type of probe as a reference in GTEM cell above 1GHz

Wu, Ifong; Ishigami, Shinobu; Gotoh, Kunihito; Matsumoto, Yasushi

doi:10.1587/elex.7.460

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…• GTEM (Gigahertz Transverse-Electromagnetic) cells have an internal volume where absolute field values are known, so the correlation with probes output power or voltages is direct [18]. • In regard to AF H , for lower frequencies where impedance mismatches effects are not relevant, a loop (radius R) is excited by a generator in series with a resistor [19].…”

Section: Probes and Characterizationmentioning

confidence: 99%

Near-Field Measurement System Based on a Software Defined Radio

Perotoni¹,

Silva²,

Silva³

et al. 2022

PIER Letters

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This article reports an SDR (software-defined radio) operating as a receiver for nearfield measurement, aiming at EMC pre-compliance tests. The SDR replaces professional-grade RF instrumentation with benefits, with lower costs. Its software application is based on open-source GNU-Radio, which grants a higher versatility to the signal processing and visualization, requiring a single laptop to analyze the data and control the whole system, in real time. Reported tests used two commercial PCB magnetic field probes, and a proof-of-concept near-field imaging is performed in an L-shaped transmission line at 1100 MHz.

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Section: Probes and Characterizationmentioning

confidence: 99%

Near-Field Measurement System Based on a Software Defined Radio

Perotoni¹,

Silva²,

Silva³

et al. 2022

PIER Letters

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show abstract

“…While an amount of the existing literature focused on the influence of shielding layer material and shielding layer thickness on SE [2,3,4,5,6,7,8,9,10,11,12]. There were also a number of studies on SE measurement methods in [13,14,15,16,17] and probe calibration in [18,19,20,21]. Moreover, some fast approaches were presented for the evaluation of near field SE in [22,23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

An optimization method for conformal shielding

Yuan

Li²,

Cao

et al. 2021

IEICE Electron. Express

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Conformal shielding, as an efficient method for solving the electromagnetic interference (EMI) problem, is becoming increasingly important. In this Letter, the Taguchi method in quality engineering was introduced into the design optimization of conformal shielding. As a pilot test, the authors studied the order of the effects of shielding layer material, shielding layer thickness, and distance between ground vias (D-via) on shielding effectiveness (SE). The comparison between simulated results and predicted results proves that the optimization method is accurate and effective. The thin-film conductivity of copper was measured, and the model was revised using the measurement results. For validation, built a near-field scanning platform, and measured shielding effectiveness and simulated shielding effectiveness show a good agreement from 0.1 to 7.5 GHz.

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“…The TEM cell and GTEM cell are inexpensive and convenient to use compared to the anechoic chamber. However, the size of TEM cells is limited by the cutoff frequency and the electric field distribution above 1 GHz in GTEM cells is not strictly uniform [2]. Therefore, developing new equipment that is inexpensive, uniform field distribution, and can propagate a TEM mode for EMC testing is necessary.…”

Section: Introductionmentioning

confidence: 99%

Basic analysis of large quasi-TEM waveguides using dipole frequency selective surface for EMC testing

Ishigami

Gotoh

et al. 2011

IEICE Electron. Express

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Abstract:A large quasi-TEM waveguide for EMC testing is successfully designed by a waveguide with two artificial magnetic conductor (AMC) side-walls comprising an array of a dipole frequency selective surface (FSS) printed on a grounded dielectric slab. In this paper, characteristics of the large quasi-TEM waveguide which dimensions are equal to or larger than the wavelength are investigated. At the resonant frequency of the AMC side-walls, the phase velocity is equal to the speed of light and the electric field distribution is uniform in the large quasi-TEM waveguide. Therefore, a quasi-TEM mode has been achieved in the large quasi-TEM waveguide. In addition, by adjusting the size of the AMC structure, a large quasi-TEM waveguide can be applied to arbitrary frequency for EMC testing. Keywords: large quasi-TEM waveguide, artificial magnetic conductor, dipole frequency selective surface, quasi-TEM mode, uniform field distribution Classification: Electromagnetic compatibility (EMC) References

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Probe calibration by using a different type of probe as a reference in GTEM cell above 1GHz

Cited by 6 publications

References 3 publications

Near-Field Measurement System Based on a Software Defined Radio

Near-Field Measurement System Based on a Software Defined Radio

An optimization method for conformal shielding

Basic analysis of large quasi-TEM waveguides using dipole frequency selective surface for EMC testing

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