Microwave Permittivity Measurements Using Disk Cavity Specimens

Olyphant, Murray

doi:10.1109/tim.1971.5570665

Cited by 5 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As they are a priori unknown, the best possible strategy is to design the geometry of the line kept empty, in order to achieve 50 Ω. When filled lines are measured, their mismatch against 50 Ω induced by the filling powder creates the well-known ripple phenomenon [34] on the S-parameters, and so, on ε r and μ r , as they are deduced fromS-parameters using (3) and (4). Despite this ripple, the trend behavior of ε r and μ r is clearly retrieved from their mean value and further assessed by the phenomenological model (11).…”

Section: Determination Of Microwave Properties Of Nanopowdersmentioning

confidence: 99%

“…The test cell can be a waveguide, a coaxial line, or a planar topology. At microwaves and millimeter waves, the permittivity is derived from the measured variation of the reflection coefficient [1] at the input of a shortened waveguide [2] or a resonant cavity [3] loaded by a solid sample. For liquids or powders, transmission lines combining reflection and transmission measurements are preferred: they use waveguides or TEM (transverse electric magnetic) transmission lines, coaxial [4], or not [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microwave Characterization of Metal-Decorated Carbon Nanopowders Using a Single Transmission Line

Mederos-Henry

Hermans

Huynen

2019

Journal of Nanomaterials

View full text Add to dashboard Cite

This paper presents a novel approach for the characterization of microwave properties of carbon-based nanopowders, decorated or not with magnetic nanoparticles. Their microwave parameters, dielectric constant, electrical conductivity, and complex magnetic permeability are extracted from measurements performed using a single transmission line acting as a test cell. Two geometries of transmission line were tested, and successful results were obtained with each one of them. The measurement results are assessed by a phenomenological model enabling to fit the measurement of the dielectric constant and conductivity, providing an insight on the compacity quality of the powder sample. Also, the extraction of the permeability is validated by the detection of a ferromagnetic resonance showing a linear dependence on external DC magnetic field.

show abstract

Section: Determination Of Microwave Properties Of Nanopowdersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%