One-port surface elastic wave resonator on high permittivity substrate
US10879874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2016 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Jul 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/77
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface elastic wave resonator comprises a piezoelectric material to propagate the surface elastic waves and a transducer inserted between a pair of reflectors comprising combs of interdigitated electrodes and having a number Nc of electrodes connected to a hot spot and an acoustic aperture W wherein the relative permittivity of the piezoelectric material is greater than about 15, a product of Nc·W/fa for the transducer being greater than 100 μm·MHz−1, where fa is the antiresonance frequency of the resonator. A circuit comprises a load impedance and a resonator according to the invention and having an electrical response manifesting as a peak in the coefficient of reflection S11 at a frequency of a minimum value of the parameter S11 that is lower than −10 dB, the antiresonance peak of the resonator being matched to the impedance of the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.