Senseor

Sébastien Alzuaga

Sylvain Ballandras

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&#xb7;W/fa for the transducer being greater than 100 &#x3bc;m&#xb7;MHz, 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 Sat a frequency of a minimum value of the parameter Sthat is lower than &#x2212;10 dB, the antiresonance peak of the resonator being matched to the impedance of the load.

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Tarcenay, France

Sébastien Alzuaga