An electrodeless system for measurement of liquid sample dielectric properties in radio frequency band.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3462

An electrodeless, contactless RF measurement system using an LC resonant circuit (measuring resonance frequency and quality factor with and without a liquid sample in a test tube) is described. Test measurements of dielectric properties of conventional liquid…

Study snapshot

PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

An electrodeless measurement system based on a resonant circuit is proposed for the measurement of dielectric properties of liquid samples at RF (radio frequency). Generally, properties as dielectric constant, loss factor and conductivity are measured by parallel plate capacitor cells: this method has several limitations in the case of particular liquid samples and in the range of radiofrequencies. Our method is based on the measurements of resonance frequency and quality factor of a LC resonant circuit in different measuring conditions, without and with the liquid sample placed inside a test tube around which the home made coil is wrapped. The measurement is performed using a network analyzer and a dual loop probe, inductively coupled with the resonant circuit. One of the advantages of this method is the contactless between the liquid sample and the measurement electrodes. In this paper the measurement system is described and test measurements of conventional liquids dielectric properties are reported.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Dielectric constant
Loss factor
Conductivity
Resonance frequency
Quality factor

Limitations

Specific RF frequencies used are not stated in the abstract.
No quantitative performance metrics (e.g., accuracy, precision, comparison to standard methods) are provided in the abstract.
Sample types and number of measurements are not specified in the abstract.

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "measurement system (resonant LC circuit)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Dielectric constant",
    "Loss factor",
    "Conductivity",
    "Resonance frequency",
    "Quality factor"
  ],
  "main_findings": "An electrodeless, contactless RF measurement system using an LC resonant circuit (measuring resonance frequency and quality factor with and without a liquid sample in a test tube) is described. Test measurements of dielectric properties of conventional liquids are reported.",
  "effect_direction": "unclear",
  "limitations": [
    "Specific RF frequencies used are not stated in the abstract.",
    "No quantitative performance metrics (e.g., accuracy, precision, comparison to standard methods) are provided in the abstract.",
    "Sample types and number of measurements are not specified in the abstract."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electrodeless measurement",
    "dielectric properties",
    "liquid samples",
    "radio frequency",
    "resonant circuit",
    "LC circuit",
    "network analyzer",
    "quality factor",
    "resonance frequency",
    "contactless"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1109/iembs.2006.259282
PubMed: 17946603

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