Anomalous asymmetric acoustic radiationin low-loss SAW filters

Knuuttila, J.V.; Tikka, P.; Hartmann, C.S.; Plessky, V.P.; Salomaa, M.M.

doi:10.1049/el:19990739

Cited by 16 publications

(7 citation statements)

References 2 publications

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“…Laser interferometric surface scans have shown that, above the resonance frequency, an acoustic beam is able to escape the resonator area through the busbars [26]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

Theory for shear horizontal surface acoustic waves in finite synchronous resonators

Koskela

Plessky²,

Salomaa

2000

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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An analytic approach is developed for simulating synchronous resonators employing shear horizontally polarized surface acoustic waves, such as surface transverse waves, and leaky surface acoustic waves on LiTaO/sub 3/ and LiNbO/sub 3/ substrates. The approach, based on a simplified parametrized Green's function theory, allows the description of the localization of the wave and the interaction with bulk acoustic waves. An analytic expression is found for the harmonic admittance of an infinite periodic electrode array, and approximate corrections for finite structures are presented. The model enables fast computation of the admittance of synchronous resonators, and it compares favorably with experiments and numerical simulations.

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“…Laser interferometric surface scans have shown that, above the resonance frequency, an acoustic beam is able to escape the resonator area through the busbars [26]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

Theory for shear horizontal surface acoustic waves in finite synchronous resonators

Koskela

Plessky²,

Salomaa

2000

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Hartmenn Research later acquired the laser probe from TI. Shen Jen collaborated with Clinton on many occations to use the laser probe to study SAW propagation and device physics [41,46,63,71,76]. I was so much impressed on the measured results and keen to have the equipement.…”

Section: IIImentioning

confidence: 99%

Clinton Sylvester Hartmann: His achievements and our unwritten stories

Hashimoto

2013

2013 IEEE International Ultrasonics Symposium (IUS)

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A brilliant super-star in the SAW community, Clinton Sylvester Hartmann passed away in Dallas, TX, on February 4, 2013, at the age of 68. This article reviews Clinton's professional career and achievements at first, and then a few stories between Clinton and me are given. The stories tell how deeply Clinton contributed to my career up and early achievements. They also show how Clinton motivated, trained, and directed one young engineer.

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“…For achieving these goals, SAW impedance element filters (IEF), based on interdigital transducer (IDT) resonators, have proven to be the leading contemporary SAW device-design architecture. The experimental discovery of a novel acoustic loss mechanism in these SAW filters was recently reported [1]. The effect has been succesfully modelled and found to be responsible for additional losses slightly above the individual resonance frequencies of the IDT resonators [2].…”

mentioning

confidence: 98%

Measurement of BAW radiation from low-loss LSAWresonators

Knuuttila

Saarinen

Hartmann³

et al. 2001

Electron. Lett.

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The first direct experimental observation of bulk-acoustic wave radiation from a leaky surface-acoustic wave transducer, measured arriving at the backside of the piezoceramic substrate, is reported. A scanning laser-interferometric probe is used to map the spatial distribution of the bulk-wave radiation patterns on the substrate bottom. The different energy-flow angles into the substrate are obtained as functions of frequency and used to identify the corresponding bulkwave modes arriving at the substrate bottom. Programme for Electronic Materials and Microsystems (EMMA), by the Academy of Finland.

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Anomalous asymmetric acoustic radiationin low-loss SAW filters

Cited by 16 publications

References 2 publications

Theory for shear horizontal surface acoustic waves in finite synchronous resonators

Theory for shear horizontal surface acoustic waves in finite synchronous resonators

Clinton Sylvester Hartmann: His achievements and our unwritten stories

Measurement of BAW radiation from low-loss LSAWresonators

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