Fourier analysis of SAW resonance frequency variations for improved detection

Nicolae, Ionut; Miu, Dana; Viespe, Cristian

doi:10.1016/j.sna.2019.06.019

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…When additional sensing coating is added on the top of the IDT electrode, or between them, it is for the possible adherent attachment (adsorption, or absorption) of analytes with different origins, such as toxic gases, biological substances, humidity, etc. Then, the sensing mechanism is due to the mass loading, and it can be related to the change of the analyte's concentration [23]. Changes in mass and viscosity at the biosensitive layer can be detected by recording changes in the acoustic-wave properties such as velocity, attenuation, resonant frequency shift, or time delay.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Topologies of the Surface Acoustic Wave Sensors and the Corresponding Electronic Processing Circuits

Aleksandrova

Badarov

2022

Sensors

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In this paper, we present an overview of the latest achievements in surface acoustic wave (SAW) sensors for gas or liquid fluid, with a focus on the electrodes’ topology and signal processing, as related to the application of the sensing device. Although the progress in this field is mainly due to advances in the materials science and the sensing coatings, the interdigital (IDT) electrodes’ organization is also an important tool for setting the acoustic-wave-distribution mode, and, thus, for improvement of the SAW performance. The signal-conditioning system is of practical interest, as the implementation of the SAW, as a compact and mobile system is dependent on this electronic circuit. The precision of the detection of the SAW platform is related not only to the IDT electrodes’ geometry but also to their location around the sensing layer. The most commonly used architectures are shown in the present paper. Finally, we identify the needs for the future improvement of these prospective sensors.

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Section: Introductionmentioning

confidence: 99%

Recent Progress in the Topologies of the Surface Acoustic Wave Sensors and the Corresponding Electronic Processing Circuits

Aleksandrova

Badarov

2022

Sensors

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“…By using this strategy, it may be possible to decrease the size and weight of the entire system while increasing the efficiency of energy transfer. In [12], a fresh detection technique based on Fourier analysis of the phase shift noise of the SAW oscillator has been presented. This is a significant contribution to the field of AI, as it provides a more accurate way to detect and diagnose diseases.…”

Section: Rc Phase Shift Oscillatormentioning

confidence: 99%

A PVT tolerant voltage-controlled oscillator for automotive applications

Chen¹

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This thesis focusses on the development of an integrated oscillator for automotive applications. The oscillator operates based on the Barkhausen criterion, which is a mathematical requirement used in electronics to predict whether a linear electronic circuit will oscillate. In this thesis, a voltage-controlled oscillator is designed for increased performance under various process, voltage and temperature (PVT) conditions. By applying a voltage reference block, the output frequency of 0.5MHz, 0.75MHz, 1MHz or 1.25MHz can be obtained. In order to compensate for the variations at PVT corners, the trimming technology is applied to increase the accuracy. The supply voltage is considered to be varying between 2.1V and 5.5V while the temperature range is -40oC -125oC.

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Power spectra of pressure pulsations in the processes of evaporation/boiling of a liquid at low pressures

Brester

Zhukov

Shvetsov

et al. 2021

J. Phys.: Conf. Ser.

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This paper presents experimental data on pressure fluctuations during evaporation/boiling of a thin liquid film under conditions of reduced pressure. The experimental data were obtained as a result of studying heat transfer on a smooth horizontal surface in a wide range of changes in the height of the liquid layer. Using the fast Fourier transform, the power spectra of pressure pulsations versus frequency were obtained. It was found that the power spectra of pressure pulsations differ depending on the mode of evaporation/boiling in the system.

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Fourier analysis of SAW resonance frequency variations for improved detection

Cited by 3 publications

References 17 publications

Recent Progress in the Topologies of the Surface Acoustic Wave Sensors and the Corresponding Electronic Processing Circuits

Recent Progress in the Topologies of the Surface Acoustic Wave Sensors and the Corresponding Electronic Processing Circuits

A PVT tolerant voltage-controlled oscillator for automotive applications

Power spectra of pressure pulsations in the processes of evaporation/boiling of a liquid at low pressures

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