The characterization of SAW coupling factor from paired IDT insertion loss measurements

Hickernell, F.S.

doi:10.1109/ultsym.2002.1193390

Cited by 2 publications

(3 citation statements)

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“…The IDT topology and the main experimental features were described in [1,2]. Below it is described with some minor refinements.…”

Section: Measurement Methods and Treatment Of Resultsmentioning

confidence: 99%

“…The definition of the conversion loss of the IDT was proposed in [2] to find IDT's efficiency from the experiment. The important point of this definition lies in the fact that the excitation and the detection of the SAW by an unapodized IDT may be considered as located in the middle of the IDT.…”

Section: Calculation Of Harmonic Idt Responsementioning

confidence: 99%

“…Frequently these material parameters can be found from the measurements of the propagation characteristics of acoustic waves in a wide frequency range. One of the methods to launch and to detect acoustic waves (e.g., surface acoustic waves (SAW)) in a wide frequency range is to use a multiharmonic IDT [1,2]. For this study the IDT metallization ratio is near 0.6 for the effective generation and receiving of SAWs at different harmonics (the metallization ratio is the ratio of electrode width to the distance between the middle of the adjacent electrodes).…”

Section: Introductionmentioning

confidence: 99%

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An experimental and theoretical comparison for the insertion loss of paired IDTs for high frequency harmonics

Fedosov

Hickernell²

IEEE Symposium on Ultrasonics, 2003

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Several theoretical models are known to describe the harmonic response of surface acoustic wave (SAW) interdigital transducers (IDTs) of different topologies. The experimental results for insertion loss of IDTs, obtained for several tens of frequency harmonics, are compared with theoretical predictions of the well-known model, based on the "quasi-static approximation". The paired transducer insertion loss of LiTaO 3 (Y-112 0 ) and ST-X quartz were measured using a harmonic rich split finger IDT (metallization ratio is 0.6 and electrode thickness is 0.1um, approximately) over a frequency range from 30 MHz to above 2.4 GHz (LiTaO 3 ) and to above 1.6 GHz (quartz). It is shown that the measured conversion loss of the IDT is in good agreement (about 1.5 dB) with theoretical results up to the 47th harmonic for LiTaO 3 and up to the 43rd harmonic for quartz.

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“…The IDT topology and the main experimental features were described in [1,2]. Below it is described with some minor refinements.…”

Section: Measurement Methods and Treatment Of Resultsmentioning

confidence: 99%

Section: Calculation Of Harmonic Idt Responsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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