Design of a Waveguide Test Cell for Q Band Liquid Permittivity Measurements

Kalisiak, Michal; Wiatr, Wojciech; Papis, Radoslaw

doi:10.23919/mikon54314.2022.9924955

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…The diameter should be small enough not to disturb the EM field and big enough for convenient liquid dosing. The influence on the permittivity measurement of the inlet was investigated in [ 26 ]. The volume of liquid can be changed or adjusted without any disassembling.…”

Section: Design Of the Rectangular Waveguide Fixturementioning

confidence: 99%

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Applicability of the Meniscus-Removal Method for Q-Band Liquid Characterization in Semi-Open Waveguide Cell

Kalisiak

Wiatr

Papis

2023

Sensors

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We present the broadband transmission-reflection meniscus-removal method for liquid characterization in a semi-open rectangular waveguide. The algorithm utilizes 2-port scattering parameters measured with a calibrated vector network analyzer for three states of the measurement cell: empty and filled with two liquid levels. The method enables the mathematical de-embedding of a symmetrical sample of a liquid, not distorted with a meniscus, and provision of its permittivity and permeability, as well as its height. We validate the method for propan-2-ol (IPA), a 50% aqueous solution of IPA, and distilled water in the Q-band (33–50 GHz). We investigate typical problems for in-waveguide measurements, such as phase ambiguity.

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Section: Design Of the Rectangular Waveguide Fixturementioning

confidence: 99%

“…We used propan-2-ol (IPA), distilled water and a 50% aqueous solution of propan-2-ol (IPA50). For the Q-band measurements, we manufactured a novel semi-open fixture in a WR-22 rectangular waveguide standard, the preliminary design of which was presented in [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Applicability of the Meniscus-Removal Method for Q-Band Liquid Characterization in Semi-Open Waveguide Cell

Kalisiak

Wiatr

Papis

2023

Sensors

Self Cite

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“…These methods both have their own advantages, but also have some limitations. In network parameter methods, the sensor and material are equivalent in a single or multi-port network that combines electromagnetic parameter measurement methods, such as the transmission/reflection method, free-space method, short-ended method, and open-ended method [13][14][15][16][17], and then its permittivity can be measured through a vector network analyzer and other instruments. Network parameter methods offer relatively high accuracy over a wide frequency band and require less sample preparation than resonant methods [18], and therefore, are suitable for the measurement of permittivity of high-loss materials.…”

Section: Introductionmentioning

confidence: 99%

Design of a Microwave Heating and Permittivity Measurement System Based on Oblique Aperture Ridge Waveguide

Gou

Chen

Dong

et al. 2023

Sensors

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In this paper, an oblique aperture ridge waveguide operating at 2450 MHz is proposed, and, using the ridge waveguide, a permittivity measurement system is constructed which can measure the permittivity of materials during microwave heating. The system calculates the amplitudes of the scattering parameters by using the forward, reflected and transmitted powers of the power meters, and it reconstructs the permittivity of the material by combining the scattering parameters with an artificial neural network. The system is used to measure the complex permittivity of mixed solutions of methanol and ethanol with different ratios at room temperature, and the permittivity of methanol and ethanol with increasing temperature, from room temperature to 50 °C. The measured results are in good agreement with the reference data. The system allows simultaneous measurement of the permittivity with microwave heating and provides real-time, rapid changes in the permittivity during heating, avoiding thermal runaway and providing a reference for applications of microwave energy in the chemical industry.

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Design of a Waveguide Test Cell for Q Band Liquid Permittivity Measurements

Cited by 2 publications

References 12 publications

Applicability of the Meniscus-Removal Method for Q-Band Liquid Characterization in Semi-Open Waveguide Cell

Applicability of the Meniscus-Removal Method for Q-Band Liquid Characterization in Semi-Open Waveguide Cell

Design of a Microwave Heating and Permittivity Measurement System Based on Oblique Aperture Ridge Waveguide

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