scholarly journals Temperature Frequency Characteristics of Hexamethyldisiloxane (HMDSO) Polymer Coated Rayleigh Surface Acoustic Wave (SAW) Resonators for Gas-Phase Sensor Applications

Micromachines ◽  
2012 ◽  
Vol 3 (2) ◽  
pp. 413-426 ◽  
Author(s):  
Karekin D. Esmeryan ◽  
Ivan D. Avramov ◽  
Ekaterina I. Radeva
Keyword(s):  
Acoustic Wave ◽  
Gas Phase ◽  
Surface Acoustic Wave ◽  
Frequency Characteristics ◽  
Sensor Applications ◽  
Phase Sensor ◽  
Saw Resonators

scholarly journals On the Performance Evaluation of Commercial SAW Resonators by Means of a Direct and Reliable Equivalent-Circuit Extraction

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 303
Author(s):  
Giovanni Gugliandolo ◽  
Zlatica Marinković ◽  
Giuseppe Campobello ◽  
Giovanni Crupi ◽  
Nicola Donato
Keyword(s):  
Performance Evaluation ◽  
Acoustic Wave ◽  
Equivalent Circuit ◽  
Surface Acoustic Wave ◽  
Equivalent Circuit Model ◽  
Practical Applications ◽  
Saw Devices ◽  
S Parameter ◽  
Commercial Device ◽  
Saw Resonators

Nowadays, surface acoustic wave (SAW) resonators are attracting growing attention, owing to their widespread applications in various engineering fields, such as electronic, telecommunication, automotive, chemical, and biomedical engineering. A thorough assessment of SAW performance is a key task for bridging the gap between commercial SAW devices and practical applications. To contribute to the accomplishment of this crucial task, the present paper reports the findings of a new comparative study that is based on the performance evaluation of different commercial SAW resonators by using scattering (S-) parameter measurements coupled with a Lorentzian fitting and an accurate modelling technique for the straightforward extraction of a lumped-element equivalent-circuit representation. The developed investigation thus provides ease and reliability when choosing the appropriate commercial device, depending on the requirements and constraints of the given sensing application. This paper deals with the performance evaluation of commercial surface acoustic wave (SAW) resonators by means of scattering (S-) parameter measurements and an equivalent-circuit model extracted using a reliable modeling procedure. The studied devices are four TO-39 packaged two-port resonators with different nominal operating frequencies: 418.05, 423.22, 433.92, and 915 MHz. The S-parameter characterization was performed locally around the resonant frequencies of the tested SAW resonators by using an 8753ES Agilent vector network analyzer (VNA) and a home-made calibration kit. The reported measurement-based study has allowed for the development of a comprehensive and detailed comparative analysis of the performance of the investigated SAW devices. The characterization and modelling procedures are fully automated with a user-friendly graphical user interface (GUI) developed in the Python environment, thereby making the experimental analysis faster and more efficient.

1/f noise in etched groove surface acoustic wave (SAW) resonators

1994 ◽  
Vol 41 (6) ◽  
pp. 853-862 ◽  
Author(s):  
T.E. Parker ◽  
D. Andres ◽  
J.A. Greer ◽  
G.K. Montress
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Groove Surface ◽  
Saw Resonators

scholarly journals Optimizing the Design of Surface-Acoustic-Wave Ring Resonator by Changing the Interdigitated Transducer Topology

2021 ◽  
Vol 24 (6) ◽  
pp. 51-62
Author(s):  
S. Yu. Shevchenko ◽  
D. A. Mikhailenko ◽  
B. Nyamweru
Keyword(s):  
Acoustic Wave ◽  
Signal Detection ◽  
Surface Acoustic Wave ◽  
Acoustic Waves ◽  
Sensitive Element ◽  
Ring Resonator ◽  
Surface Acoustic Waves ◽  
Frequency Characteristics ◽  
Optimal Topology ◽  
Comsol Multiphysics

Introduction. Previous works considered the frequency characteristics and methods for fixing sensitive elements in the form of a wave ring resonator on surface acoustic waves in a housing made of various materials, as well as the influence of external factors on sensitive elements. It was found that the passband in such a case is sufficiently wide, which can affect adversely signal detection when measuring acceleration using the sensitive element under development. Therefore, it has become relevant to reduce the sensitive element’s bandwidth by changing the design of the interdigitated transducer (IDT).Aim. To demonstrate an optimal topology for an IDT with a low bandwidth, leading to improved signal detection when acceleration affects the sensitive element.Materials and methods. The finite element method and mathematical processing in AutoCAD and in COMSOL Multiphysics.Results. Nine topologies of IDT are proposed. All these types were investigated using the COMSOL Multiphysics software on lithium niobate substrates, which material acts as a sensitive element. The frequency characteristics are presented. The data obtained allowed an optimal design of the ring resonator to be proposed: an IDT with rectangular pins without selective withdrawal.Conclusion. Self-generation in a ring resonator can be performed by withdrawing no more than one pair of IDTs for 10 or more periods. In this case, the withdrawal of IDTs should be uniform. With an increase in the number of IDT withdrawals, the geometry of the ring resonator is violated, and the wave leaves the structure. The presence of a shared bus keeps the surface acoustic wave inside the IDT structure, and the narrowing of the periods towards the inner part of the structure makes it possible to improve the frequency characteristics of the ring resonator on surface acoustic waves.

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