Surface-acoustic-wave delay-line controlled low-frequency oscillators

1975 ◽  
Vol 63 (7) ◽  
pp. 1071-1072
Author(s):  
S. Pookaiyaudom
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Delay Line ◽  
Low Frequency

Study of Low-Frequency Narrow Bandwidth Surface Acoustic Wave Sensor for Liquid Applications

2019 ◽  
Author(s):  
Kun-Lin Lee ◽  
Ioana Voiculescu
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Acoustic Waves ◽  
Delay Line ◽  
Water Drop ◽  
Low Frequency ◽  
Polymer Waveguide ◽  
Saw Devices ◽  
A Cell ◽  
Liquid Sensing

Abstract Surface acoustic wave (SAW) devices have been applied as telecommunication filter for decades. Due to its simple interdigitated transducer (IDT) layout and geometry-dependent frequency, the SAW filter operates at the designed frequency and its working bandwidth could be designed to fulfill specific applications. Researchers also use SAW devices for sensing the mass or pressure in air. Furthermore, SAW device can be employed in liquid environments. The main focus of this paper is to present a Love mode device for liquid sensing. The Love mode device included a shear-horizontal surface acoustic wave (SH-SAW) delay-line configuration with a photoresist waveguide, which was deposited on split-electrode IDT and reflectors. The substrate was ST-cut quartz, and the SH-SAW propagated between the waveguide and the piezoelectric substrate. Using the Love mode device, we monitored the frequency shift corresponding to a water drop. We demonstrate that the insertion loss level is not critical for S-parameter transmission signal readout. The signal quality within the resonant narrowband is very important for water sensing. In this study, two types of SH-SAW devices were fabricated and tested; SH-SAW resonator and SH-SAW delay-line. We also demonstrate single and split electrodes electrode configurations to generate acoustic waves. Four different waveguide thickness values were tested to prove the benefit of thick polymer waveguide. This research also offers a standard method to fabricate SAW on ST-quartz for liquid application. In the future, we plan to integrate the Love mode device with a cell-culturing chamber to obtain a biosensor.

Viscosity sensor using a surface acoustic wave delay line

1988 ◽  
Vol 84 (S1) ◽  
pp. S199-S199 ◽  
Author(s):  
Tooru Nomura ◽  
Syu Iino ◽  
Tsutomu Yasuda
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Delay Line ◽  
Viscosity Sensor

Amplitude detection of low frequency water surface acoustic wave based on phase demodulation

2019 ◽  
Vol 48 (5) ◽  
pp. 506001
Author(s):  
张晓琳 Zhang Xiaolin ◽  
毛红杰 Mao Hongjie ◽  
李 凯 Li Kai ◽  
唐文彦 Tang Wenyan
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Water Surface ◽  
Low Frequency ◽  
Phase Demodulation

Displacement of Microparticles on Surface Acoustic Wave Delay Line Using High RF Power

2018 ◽  
Author(s):  
Melvin Paquit ◽  
Lyes Djoumi ◽  
Meddy Vanotti ◽  
Valerie Soumann ◽  
Gilles Martin ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Delay Line ◽  
Rf Power
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