Snaptrack Incorporated

Epcos Ag

Philipp Michael Jäger

Werner Ruile

Ulrike Rösler

Matthias Knapp

Jiman Yoon

An improved electroacoustic transducer with an improved mode profile is provided. The transducer comprises a transversal velocity profile with a periodic structure and an edge structure flanking the periodic structure. The velocity profile also allows to suppress the SH wave mode. A dielectric material with a periodic structure contributes to the formation of the periodic structure of the velocity profile.

Electroacoustic transducer with improved suppression of unwanted modes

An electroacoustic component is disclosed. In an embodiment, the electroacoustic component includes a piezoelectric substrate comprising a rare earth metal and calcium oxoborates (RE-COB) and component structures arranged on the substrate, the component structures being suitable for converting between RF signals and acoustic waves, wherein the waves are capable of propagation in a direction x'&#x2033;, and wherein the direction x&#x2032;&#x2033; is determined by Euler angles (&#x3bb;, &#x3bc;, &#x3b8;), the Euler angles being selected from angle ranges (20-90, 95-160, 15-55), (20-85, 95-160, 95-125) and (15-25, 85-100, 0-175).

Electroacoustic component and crystal cuts for electroacoustic components

For a component operating with acoustic waves, it is proposed to provide a compensation layer on the component for compensating for a negative temperature coefficient of the frequency, which includes a material based on a chemical compound made up of at least two elements, which has a negative thermal expansion coefficient.

Micro-acoustic component having improved temperature compensation

The present invention relates to a filter chip (), comprising an interconnection of at least one first and one second resonator () operating with bulk acoustic waves, wherein the first resonator () operating with bulk acoustic waves comprises a first piezoelectric layer () that is structured in such a way that the first resonator () has a lower resonant frequency than the second resonator ().

Filter chip and method for producing a filter chip

An electroacoustic transducer has a piezoelectric layer, which is structured in such a way that, in the case of an alternating electric field applied in one spatial direction, an oscillation mode with oscillations in three spatial directions is excited.

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Munich, Germany

Philipp Michael Jäger