Design of H-shaped planar displacement microwave sensors with wide dynamic range

Zhu, Pengwen; Wang, Xiang; Zhao, Wensheng; Wang, Jing; Wang, Dawei; Hou, Fang; Wang, Gaofeng

doi:10.1016/j.sna.2021.113311

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…Microwave dielectric spectroscopy has advantages in detecting and identifying materials due to its real-time measurements, non-invasiveness, high sensitivity, and robustness [ 1 ]. Planar resonator-based microwave sensors have been applied in many testing and characterization scenarios, including displacement and rotation sensing [ 2 ], crack detection of metal and non-metal materials [ 3 ], medical settings [ 4 ], and dielectric constant measurements for solid dielectrics and liquid chemicals [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications

Wang

et al. 2022

Sensors

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This study proposes an ultrahigh-sensitivity split-ring resonator-based microwave sensor for retrieving the complex permittivity of liquid samples. An interdigital capacitor structure was used to expand the sensing area and the sensitivity. A defected ground structure and A parallel dual split-ring resonator were introduced to improve the quality factor. A polydimethylsiloxane microfluidic channel substrate was placed above the interdigital capacitor structure. The channel route coincided with the interdigital gap to fully utilize the strong electric field. Ethanol–water solutions with varying ethanol fractions were injected into the channel as the testing liquid. It was demonstrated that the variation in resonant frequency can be used to retrieve the dielectric properties of liquid samples. The proposed sensor used a small liquid volume of ~0.68 μL and provided values in good agreement with the reference data.

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Section: Introductionmentioning

confidence: 99%

An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications

Wang

et al. 2022

Sensors

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“…Recently, various types of microwave sensors have been reported, such as liquid and displacement sensors. 4,5 Among them, microwave angular displacement sensor is used to measure the rotation angle and has attracted much attention due to their low manufacturing and measurement cost. 6 It is usually composed of a stator and a rotor, and the stator is fixed onto the test platform with the rotor rotating.…”

Section: Introductionmentioning

confidence: 99%

An ultrahigh‐sensitivity microwave angular displacement sensor with a wide dynamic range

Lin

Wang

Zhao

et al. 2022

Micro & Optical Tech Letters

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A microwave angular displacement sensor with dynamic range up to 180°and ultrahigh sensitivity is designed and fabricated. In the proposed sensor, a stator is designed for reference and a rotatable rotor is attached to it to implement real-time measurement of the rotation angle. As the rotor is attached to the stator, a CSRR-like resonant structure would be formed, with the resonant frequency linearly changing with the angular displacement. The measurement results show that the resonant frequency of the designed angular displacement sensor increases from 2.398 to 6.348 GHz linearly as the angle varies from 0°to 180°, with an excellent sensitivity of 21.94 MHz/°a chieved.

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