Resonance methods for microwave studies of dielectrics (Review)

Abstract-An open resonance cell (ORC) with finite-length cylindrical mirrors is suggested for making absolute measurements of complex permittivity in the case of stretched cylindrical specimens or liquid dielectrics in cylindrical containers. For H-polarization, we report ORC features simulated in rigorous electromagnetic terms using a twodimensional (2-D) model of an open resonator with cylindrical mirrors and a dielectric test rod inserted. On this basis, the ORC laboratory prototype with finite-length mirrors was built. The measurements of dielectric test rods were performed in the 10 mm wave band. In the studies of dielectric materials, E-polarized modes of the cylindricalmirror ORC demonstrate some specific features, which are discussed, too.

Section: Experimental Prototype Of the Orc With A Dielectric Insertsupporting

confidence: 77%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Open Resonance Cell for Millimeter Wave Dielectrometer Applications

Miroshnichenko¹,

Melezhik²,

Senkevich³

2008

“…Of all available methods, resonant techniques are particularly attractive for highprecision measurements of real and imaginary parts of complex dielectric constant [9][10][11][12]. The most impressive results were achieved with high-quality open resonators employing large-area mirrors and providing quality factors (Q factors) exceeding 6 · 10 5 at the frequencies f ∼ 100 GHz [9].…”

Section: Introductionmentioning

confidence: 94%

Mm-Wave Dielectric Parameters of Magnesium Fluoride Glass Wafers

Yurchenko¹,

Çiydem²,

Grądziel³

et al. 2017

Abstract-We measured millimeter-wave dielectric parameters of magnesium fluoride glass wafers at the room temperature in the frequency band of 75-110 GHz by applying the open resonator technique based on the use of Bragg structures and related multi-layer assemblies. Through the comparison of measured and simulated transmission spectra of various structures, the dielectric constant of magnesium fluoride glass is found as ε = 5.50±0.01. The estimate for the loss tangent is found to be tan δ = 0.00005, with a possibility that the actual losses could be smaller than this value.

“…For measuring high-frequency dielectric losses, there are many experimental methods [1][2][3][4][5][6][7][8][9][10][11], of which resonant techniques are particularly attractive and beneficial [5][6][7][8][9][10][11]. Of various techniques, there is one interesting method based on observing high-quality transmission notches (of quality factor Q ∼ 300-500) in a system of highly absorbing liquid (of loss tangent tan(δ) > 1) confined in a capillary which is mounted in a waveguide [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High-Q Reflection Notch Method for Mm Wave Measurements of Large Dielectric Losses Using a Stack Resonator: Analysis and Simulations

Yurchenko¹

2012

Abstract-A high-Q reflection notch method for measuring large dielectric losses in absorbing materials when using a stack resonator, which is a one-dimensional analogue of a capillary-in-a-waveguide technique, has been proposed. A detailed explanation of the effects that lay the basis of the method has been presented. The method is particularly accurate and sensitive for highly absorbing materials when other techniques are inadequate. The method can be used for dielectric spectroscopy of a broad range of liquid and solid materials, with applications in chemical, pharmaceutical and food industry, biomedical sciences, agriculture etc., in those frequency bands of infrared, millimeter wave and, especially, THz waves where dielectric losses are significant.