Epcos Ag

Snaptrack Incorporated

Veit Meister

Werner Ruile

Thomas Bauer

Ulrike Roesler

Michael Jakob

Günter Kovacs

Ken-ya Hashimoto

Martin Bünner

Urlike Rösler

Florian Schnirch

Heide Kuhrau

Martin BÜNNER

An acoustic wave component includes a layer system having a piezoelectric layer and a first metal layer arranged on the piezoelectric layer, a first resonator having a first electrode in the first metal layer, where the first metal layer includes electrode structures periodically arranged in a direction of propagation of a wave through the acoustic wave component, and a second resonator coupled to the first resonator and electrically isolated from the first resonator. The layer system includes a waveguide for guiding a guided bulk acoustic wave in a lateral direction of the acoustic wave component.

Component that operates using acoustic waves and method for producing said component

The invention relates to a circuit operating with bulk acoustic waves with at least electroacoustic systems, each arranged in a branch (Z, Z, Z, Z), wherein each electroacoustic system comprises at least two series-connected resonators (R, R; R, R; R, R; R, R) in the respective branch, which are galvanically separated from one another and acoustically coupled to one another by means of a coupling system (K, K, K, K) arranged therebetween. The electroacoustic systems are acoustically coupled via their coupling system (K, K) and/or electrically coupled to one another.

Circuit working with acoustic volume waves and component connected to the circuit

A surface acoustic wave component includes a piezoelectric substrate and an electrode structure that includes multiple layers and that is on the piezoelectric substrate. A dielectric layer is above the electrode structure. The dielectric layer has an acoustic impedance Z. The multiple layers include a first layer system that includes at least one first layer made of a first material, which has an acoustic impedance that is less than 2Z. The second layer system includes at least one second layer made of a second material, which has an acoustic impedance that exceeds 2Z. The second layer system has a height that is between 15% and 85% of a total height of the multiple layers.

Wide bandwidth acoustic surface wave component

An electrical circuit has at least two parallel signal paths connected to one another on the antenna side and for which a band reject filter corresponding to the transmission range is implemented in a second signal path for frequency-selective improvement of insertion loss in the transmission range of a first signal path. With a band reject filter, the signal is reflected to the junction of the parallel signal paths arising from the second signal path and thus is rerouted to the first signal path.

Circuit with reduced insertion loss and component comprising one such circuit

A component operating with surface-proximal acoustic waves, in particular a filter with novel structure, has interdigital transducers arranged in serial and parallel branches, which are acoustically coupled with one another in different configurations. The component provides a loss-poor filter with simultaneously space-saving arrangement of the filter elements.

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Kagel, Germany

Veit Meister