Measurements of low loss dielectric materials in the 60 GHz band using a high-Q Gaussian beam open resonator

Coquet, Philippe; Matsui, Toshiaki; Kiyokawa, M.

doi:10.1109/imtc.1994.351825

Cited by 6 publications

(5 citation statements)

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“…The measurement theory and measurement method of the open resonator technique have been well established in many literatures such as [7][8][9][10][11][12][13][14]. As the fundamental modes, the TEM 00q resonant modes are excited in the open resonator and the resonant frequencies of the empty resonator are obtained from…”

Section: Measurement Principle and Measurement Proceduresmentioning

confidence: 99%

“…In the microwave and millimeter-wave regions a number of dielectric measurement techniques have been developed such as the closed cavity technique [1], whispering gallery mode (WGM) dielectric resonators technique [2], the open resonator technique [3], the free space method [4,5], dispersive Fourier transform spectrometers (DFTS) system and interferometric spectrometers of the Mach-Zehnder type [6]. Compared with these techniques above, the open resonator technique has been proven to be a most powerful tool for measuring complex permittivity, particularly the loss tangent of low loss materials at millimeter frequencies [3,[7][8][9][10][11][12][13][14], because it has many internal advantages such as good single-mode performance, high Q value, avoidance of difficulty in preparing small specimens to fit inside the closed cavity, and in particular, high accuracy of the measurement results.…”

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confidence: 99%

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Open Resonator System for Automatic and Precise Dielectric Measurement at Millimeter Wavelengths

Gui

Dou

Yin

et al. 2008

Int J Infrared Milli Waves

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As low loss dielectric materials, ZnS, MgF 2 , MgAl 2 O 4 and quartz ceramic have a very important application at millimeter frequencies. However, there is little information about their dielectric properties in the millimeter wavelength band. To obtain their dielectric properties, an automatic open resonator measurement system at Ka-band is designed and constructed. The importance on the precision determination of cavity length over a broad band and the checking of a measurement system are emphasized and their solutions are put forward in this paper for the first time so far as we know. The solutions of above problems ensure the credibility and high accuracy of our measurement system. The certified measurement system after a series of checking is used to measure the above materials. Lots of measurement results show that the standard deviation of measurement error is less than 0.154% in permittivity and 20.42% in loss tangent. Meanwhile, some experimental summaries on the open resonator technique are provided. Software that controls the measurement system is developed and it improves the testing efficiency greatly.

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Section: Measurement Principle and Measurement Proceduresmentioning

confidence: 99%

mentioning

confidence: 99%

Open Resonator System for Automatic and Precise Dielectric Measurement at Millimeter Wavelengths

Gui

Dou

Yin

et al. 2008

Int J Infrared Milli Waves

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“…Most are based on resonant cavities providing an accurate estimation of conductivity and permittivity [15], [16]. In [17], different illumination angles are employed to determine the reflection coefficient and, from this, the constitutive parameters.…”

Section: Introductionmentioning

confidence: 99%

SAR imaging-based techniques for Low Permittivity Lossless Dielectric Bodies Characterization

Álvarez

González-Valdés

Martínez-Lorenzo

et al. 2015

IEEE Antennas Propag. Mag.

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The following contribution aims to test two synthetic aperture radar (SAR)-image-based techniques to obtain geometry and constitutive parameter information about low-permittivity lossless dielectric materials. While characterization of high-permittivity dielectrics is relatively affordable in SAR images, the low amount of power reflected back by lowpermittivity bodies makes their characterization a challenging task. The first proposed technique combines two illumination angles (normal and 45 ) to overcome the permittivity-geometry uncertainty appearing on each independent case. The second method makes use of the relationship between reflection coefficient amplitudes between two media, which can be directly extracted from the SAR image to provide an estimation of the dielectric object permittivity. Uncertainty of both techniques can be reduced by properly combining them. We validate these methods using a simulation-based application example in the form of a millimeter-wave portal-based system for concealed-object detection.

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“…Meanwhile, open cavity is also a power tool for measuring accurately complex permittivity of dielectric materials at millimeter and sub-millimeter wavelengths. How to use this technique to measure the complex permittivity of dielectric material accurately have been investigated in detail [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. All of the open cavities investigated are based on spherical mirrors or spherical and planar mirrors.…”

Section: Introductionmentioning

confidence: 99%

A New Open Cavity at Millimeter Wave Band for Permittivity Measurement of Dielectrics

Dou¹,

Xiang²

2013

PIER M

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Measurements of low loss dielectric materials in the 60 GHz band using a high-Q Gaussian beam open resonator

Cited by 6 publications

References 6 publications

Open Resonator System for Automatic and Precise Dielectric Measurement at Millimeter Wavelengths

Open Resonator System for Automatic and Precise Dielectric Measurement at Millimeter Wavelengths

SAR imaging-based techniques for Low Permittivity Lossless Dielectric Bodies Characterization

A New Open Cavity at Millimeter Wave Band for Permittivity Measurement of Dielectrics

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