Time-Domain System for Millimeter-Wave Material Characterization

Vakili, Iman; Ohlsson, Lena; Wernersson, Lars‐Erik; Gustafsson, Mats

doi:10.1109/tmtt.2015.2449833

Cited by 25 publications

(7 citation statements)

References 30 publications

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“…In recent years, a lot of research activities have been aiming at improving the accuracy and sensitivity of material characterization, especially at frequencies below 50 GHz [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. However, very few contributions attempt to characterize dielectric and semiconductor materials at the millimeter-wave and THz frequency bands [18][19][20][21][22], [27], which are becoming increasingly important in various applications in sciences and engineering. Even so, there are currently only six commercial material characterization techniques available to date [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] and only two of which are suitable at the frequencies above 50 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…Overall, few research results have been published on dielectric material property characterization at millimeterwave and THz frequencies [18][19][20][21][22], [27]. These techniques include laminated waveguide [18], time-domain measurements [19], [22], microstrip ring resonators [20], and Frequency Selective Surface (FSS) filters [21]. Main key disadvantages of these methods include complicated setup (time domain), as well as design and fabrication complexities and costs, for examples laminated waveguide and ring resonator.…”

Section: Introductionmentioning

confidence: 99%

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Multi-modal millimeter-wave sensors for plastic polymer material characterization

Chudpooti

Doychinov

Hong

et al. 2018

J. Phys. D: Appl. Phys.

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This paper presents, for the first time, a multimodal sensor for characterizing relative permittivity of plastic polymers by integrating in a single sensor (1) frequency-reconfigurable resonance technique at 98 and 100 GHz, and (2) 80-100-GHz broadband modified transmission-line technique. The sensor is designed based on a custom-made WR-10 waveguide featuring dual rectangular Complementary Split-Ring Resonators (CSRRs). By loading the CSRRs with a Material-Under-Test (MUT), the reflected and transmitted electromagnetic waves propagating inside the waveguide are changed depending on the dielectric properties of the material. Various plastic polymer materials, e.g. Polytetrafluoroethylene (PTFE), Polymethylmethacrylate (PMMA) and High-Density Polyethylene (HDPE), are characterized. The sensor in this paper offers various key advantages over any state-of-the-art material characterization techniques at millimeter-wave frequencies, e.g. multiple characterization techniques integrated in a single device, miniaturization, much higher tolerance to changes in the measurement environment, ease of design and fabrication, and better cost effectiveness.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-modal millimeter-wave sensors for plastic polymer material characterization

Chudpooti

Doychinov

Hong

et al. 2018

J. Phys. D: Appl. Phys.

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“…There are three error terms: the input mismatch R 11 , the product of the transmission terms R 12 R 21 , and the output mismatch R 22 that have to be known to remove the influence of the error network by means of calibration, as can be seen from (6). In VNA calibration topics, this is commonly very wellknown as 3-term calibration.…”

Section: B Calibrationmentioning

confidence: 99%

“…on the dynamic range and contrast with the measurement result [4], [5], material characterization tasks are usually need to be performed with absolute exactness of the reflection magnitude and phase [6]. This is of special importance when free-space measurements are done, since the wave propagation from the antenna to the material under test (MUT) results in additional phase rotation and attenuation, which is hardly identified without further calibration measurements [7].…”

mentioning

confidence: 99%

Millimeter-Wave Characterization of Dielectric Materials Using Calibrated FMCW Transceivers

Barowski

Zimmermanns

Rolfes

2018

IEEE Trans. Microwave Theory Techn.

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This paper presents a measurement setup, an extraction algorithm, and the results from material characterization measurements in the millimeter-wave (mm-wave) regime using ultrawideband frequency-modulated continuouswave (FMCW) radar transceivers. The complex permittivity of dielectric and nonmagnetic materials is derived from radar echoes using a high-gain dielectric lens antenna setup and a measurement setup comprising elliptic mirrors. The radar transceivers perform fast and accurate measurements from 200 to 250 GHz within milliseconds. The FMCW transceivers are calibrated using a frequency-domain model that describes the systematic errors in the measurement setup. The characterization is done by a holistic model-based approach. Several well-known dielectric materials, such as polytetrafluorethylene, polyvinylchloride (PVC), or acrylic glass, are characterized among others to validate the setup's accuracy. The characterization is also done for different samples of polylactide, which is commonly used in additive manufacturing processes and 3-D printing, making it of high interest for the construction of mm-wave components.

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“…The main methods of measurement are based on waveguide, free space or resonant cavity systems, in a variety of configurations [3][4][5][6][7][8]. Nevertheless, such methods are not the most appropriate for a reliable characterization of building materials, which typically present irregular shape, random porosity and lack of homogeneity.…”

Section: Introductionmentioning

confidence: 99%

Absorption cross section of building materials at mm wavelength in a reverberation chamber

Micheli

Delfini

Pastore

et al. 2017

Meas. Sci. Technol.

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. ABSTRACTThe reverberation chamber method is used to estimate the average absorption cross section of building materials at mmWave frequencies. Analysed samples include concrete, bricks of different types, and wood. The investigation is carried out in the frequency range between 50 GHz and 68 GHz, which is of interest in the next generation of mobile telecommunication system. A cylindrical cavity is transformed into a reverberation chamber through the use of a mechanical model stirrer. The chamber field is statistically homogeneous and depolarized; therefore it can be used to probe the average response of the sample under test. In particular, through a differential measure of the average quality factor (average insertion loss) it is possible estimate the fraction of power absorbed by the sample under test. Several cube-shape samples have been characterized and compared. Obtained results show that analysed samples have remarkably different levels of the electromagnetic wave absorption, depending on both material density and chemical composition. The absorption of pure water is used as a baseline to determine the dynamic range of the measurement.

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Time-Domain System for Millimeter-Wave Material Characterization

Cited by 25 publications

References 30 publications

Multi-modal millimeter-wave sensors for plastic polymer material characterization

Multi-modal millimeter-wave sensors for plastic polymer material characterization

Millimeter-Wave Characterization of Dielectric Materials Using Calibrated FMCW Transceivers

Absorption cross section of building materials at mm wavelength in a reverberation chamber

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