2. Elastic waves in thin films
2.1 Volume wave – Shape resonators
Increased frequency and miniaturization have been major trends throughout the development of mobile telephony. The former makes it possible to increase bandwidth, and the latter to increase the number of bands in a device.
By switching from an electromagnetic wave to an elastic wave, the wavelength is divided by around 100,000. This means that miniaturization is easier using elastic waves than electromagnetic waves. Since the wavelength decreases with frequency ...
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Elastic waves in thin films
Piezoelectric thin films: material selection
Bibliography
Standards and norms
- Standard on Piezoelectricity - ANSI/IEEE 176 - 1987
- Standard Definitions and Methods of Measurement for Piezoelectric Vibrators - ANSI/IEEE 177 - 1966
Patents
CADY (W.G.). – Method of maintaining electric currents of constant frequency, US1472583A (1921).
KADOTA (M.). – Surface acoustic wave device, U.S. patent 8304959 B2 (2012).
BARTASYTE (A.), KUPRENAITE (S.) and ASTIE (V.). – Layered solid element comprising a ferroelectric layer and method for manufacturing the same, EP20 203952 (2020).
Directory
Documentation – Training – Seminars (non-exhaustive list)
DOMOCO 6G White Paper. NTT Docomo – White paper on the evolution of 5G technology and the development of 6G https://www.docomo.ne.jp/english/corporate/technology/whitepaper_6g/
MATTHEWS (P.). Microstrip filters deliver small...
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