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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ebata, Y. |
| Copyright Year | 1988 |
| Description | Author affiliation: Toshiba Electron Device Eng. Lab., Yokohama, Japan (Ebata, Y.) |
| Abstract | The author proposes a SAW (surface acoustic wave) resonator structure which suppresses the bulk-scattering loss for a high reflectivity resonator. The approach uses an effective configuration to cancel the scattered radiation bulk waves from the GRs (grating reflectors) and the IDT (interdigital transducer) simultaneously. It consists of an IDT and metal-strip GRs, which are of the same material and which have the same thickness. The distance between the IDT and the GR is set to be a half-wavelength and the pitch for the IDT electrodes is slightly shortened to tune to the resonance condition. The structure realizes quasiconstant acoustic reflection periodicity (QARP) all over the resonator. The QARP structure was shown to suppress the mode conversion loss and to improve the resonator Q-factor. Experimental results provide that the QARP structure led to a two-fold improvement of the Q-factor for the high reflectivity resonator. Furthermore, theoretical analysis also proved that the scattered bulk waves were suppressed to less than 1/100 in the QARP-structured SAW resonator. |
| Starting Page | 91 |
| Ending Page | 96 |
| File Size | 424556 |
| Page Count | 6 |
| File Format | |
| DOI | 10.1109/ULTSYM.1988.49348 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1988-10-02 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Surface acoustic waves Reflectivity Acoustic scattering Acoustic waves Gratings Acoustic transducers Inorganic materials Electrodes Resonance Acoustic reflection |
| Content Type | Text |
| Resource Type | Article |
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