| Autor: |
Bharti, Suman, Dey, Utpal |
| Zdroj: |
IEEE Sensors Journal; September 2024, Vol. 24 Issue: 18 p28784-28791, 8p |
| Abstrakt: |
A millimeter-wave (mmWave) sensor for characterization of microliter volumes of liquid-in-flow is demonstrated. The proposed sensor design is a spherical cavity resonator operating in its fundamental electric dipole mode which has its electric field intensity focused at its center through which a pipe containing the liquid is introduced. This leads to a highly sensitive design based on electromagnetic perturbation of the resonating energy. The working principle of the design is verified in accordance with the Debye dispersion model of distilled water over a wide range of temperatures spanning from near ice to almost vapor states around 35 GHz. Furthermore, low-viscous chemicals are tested. The sensor outperforms most of the other designs presented in the literature for liquids-in-flow in terms of sensitivity and range of complex permittivity deciphered. The unique advantages of spherical-shaped cavities over other typologies at mmWave frequencies have been outlined. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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