Sensitivity Improvement of Wireless Pressure Sensor by Incorporating a Saw Reflective Delay Line

Oh, Haekwan; Wang, Weng; Lee, Keekeun; Yang, Sang Sik

doi:10.21307/ijssis-2017-329

Cited by 17 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to a small base mass. SAW devices have been utilized as wireless sensors for monitoring changes of various physical parameters such as temperature13 and pressure1436 because of their structural simplicity and easy operation. Flexible SAW devices can play an important role in this respect owing e.g.…”

Section: Resultsmentioning

confidence: 99%

Flexible surface acoustic wave resonators built on disposable plastic film for electronics and lab-on-a-chip applications

Jin

Zhou

et al. 2013

Sci Rep

125

104

View full text Add to dashboard Cite

Flexible electronics are a very promising technology for various applications. Several types of flexible devices have been developed, but there has been limited research on flexible electromechanical systems (MEMS). Surface acoustic wave (SAW) devices are not only an essential electronic device, but also are the building blocks for sensors and MEMS. Here we report a method of making flexible SAW devices using ZnO nanocrystals deposited on a cheap and bendable plastic film. The flexible SAW devices exhibit two wave modes - the Rayleigh and Lamb waves with resonant frequencies of 198.1 MHz and 447.0 MHz respectively, and signal amplitudes of 18 dB. The flexible devices have a high temperature coefficient of frequency, and are thus useful as sensitive temperature sensors. Moreover, strong acoustic streaming with a velocity of 3.4 cm/s and particle concentration using the SAW have been achieved, demonstrating the great potential for applications in electronics and MEMS.

show abstract

Section: Resultsmentioning

confidence: 99%

Flexible surface acoustic wave resonators built on disposable plastic film for electronics and lab-on-a-chip applications

Jin

Zhou

et al. 2013

Sci Rep

125

104

View full text Add to dashboard Cite

show abstract

“…Each stripe, consisting of IDTs with small apertures, was modeled with a three-port P matrix and its admittance matrix was calibrated using the general P-matrix method. The detailed procedure of the calibration processes was already presented in the author's previous articles [16][17][18], so we omit the p-matrix calibration method for finding the admittance matrix and focus on the simulation results here. The frequency responses were obtained by summarizing the admittance matrices of all the stripes.…”

Section: Optimal Design Consideration and Simulationsmentioning

confidence: 99%

Effective Light Beam Modulation by Chirp IDT on a Suspended LiNbO3 Membrane for 3D Holographic Displays

Lee

2020

Sensors

Self Cite

View full text Add to dashboard Cite

An acousto-optic (AO) holographic display unit based on a suspended waveguide membrane was developed. The AO unit consists of a wide bandwidth chirp interdigital transducer (IDT) on a 20 µm thick suspended crystalline 128° YX LiNbO3 membrane, a light blocker with a 20 µm hole near the entrance, and an active lens near the exit. The 20 µm thickness of the floating membrane significantly enhanced surface acoustic wave (SAW) confinement. The light blocker was installed in front of the AO unit to enhance the coupling efficiency of the incident light to the waveguide membrane and to remove perturbations to the photodetector during measurement at the exit region. The active lens was vertically attached to the waveguide sidewall to collect the diffracted beam without loss and to modulate the focal length in free space through the applied voltage. As SAWs were radiated from the IDT, a Bragg grating with periodic refractive indexes was formed along the waveguide membrane. The grating diffracted incident light. The deflection angle and phase, and the intensity of the light beam were controlled by the SAW frequency and input power, respectively. The maximum diffraction efficiency achieved was approximately 90% for a 400 MHz SAW. COMSOL simulation and coupling of mode modeling were performed to optimize design parameters and predict device performance.

show abstract

“…Each part can be represented separately by a P-matrix IDT P and Ref P . These matrices are cascaded together and finally get the admittance matrix, which can be expressed as [8] …”

Section: Mathematical Modelmentioning

confidence: 99%

A Surface Acoustic Wave Resonator Type Sensor for Measuring Temperature

Zhang¹,

Hu²,

Ye³

et al. 2015

2015 International Conference on Computer Science and Mechanical Automation (CSMA)

View full text Add to dashboard Cite

The temperature monitoring is important for the safety of power station. In this paper, a surface acoustic wave sensor was designed for measuring the temperature of high voltage switchgear in the power station. The coupling of modes analysis was used for simulating the device and a SAW resonator was fabricated based on the simulation result, which had sharp peak and large amplitude of S11. The sensor was then tested from -20 °C to 120 °C using network analyzer. The obtained sensitivity of the sensor was about -26 KHz/°C. This small, reliable and safe sensor is very promising for application in measuring the temperature of high voltage switchgear.

show abstract

Sensitivity Improvement of Wireless Pressure Sensor by Incorporating a Saw Reflective Delay Line

Cited by 17 publications

References 11 publications

Flexible surface acoustic wave resonators built on disposable plastic film for electronics and lab-on-a-chip applications

Flexible surface acoustic wave resonators built on disposable plastic film for electronics and lab-on-a-chip applications

Effective Light Beam Modulation by Chirp IDT on a Suspended LiNbO3 Membrane for 3D Holographic Displays

A Surface Acoustic Wave Resonator Type Sensor for Measuring Temperature

Contact Info

Product

Resources

About