Epcos Ag

Snaptrack Incorporated

Ralph Durner

Ravi Kiran Challa

Wolfgang Till

Thomas Bauer

Andreas Detlefsen

Chandra Sekhar Reddy Kaipa

Aleh Loseu

Bhavya Adepu

Stephan Bolze

Loseu Aleh

A reactance filter includes a series branch that includes a number of series impedance elements that are coupled in series and a number of parallel branches each having a parallel impedance element coupled to a respective node of the series branch. Each impedance element includes a resonator that works with acoustic waves. The resonators in the series branch include a first piezoelectric material and the resonators in the parallel branches include a second piezoelectric material that is different than the first piezoelectric material.

Reactance filter comprising acoustic waves resonators

A filter circuit providing improved attenuation, a filter having improved attenuation and a duplexer with improved isolation are provided. The filter circuit has a first and a second coupling conductor segment which couple an input port to a ground port or the filter's output port. The filter circuit can be realized in the filter. The duplexer can comprise the filter, especially as its transmission filter.

RF filter circuit, RF filter with improved attenuation and duplexer with improved isolation

A SAW filter has two DMS tracks. Each DMS track includes six converters, with two converters each acting as input or output converters. The two DMS tracks are electrically connected in series by way of four pairs of coupling converters and the associated coupling lines. A common inner ground line is provided between the two DMS tracks, which extends over the entire length of the DMS tracks and crosses the coupling lines. The input converters of the first DMS track are connected to an asymmetrical port, while the output converters of the second DMS track are connected to a symmetrical port.

SAW filter operating in a balanced/unbalanced manner

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San Diego, CA, United States of America

Ralph Durner