Epcos Ag

Alenko Lic

Franz Rinner

Bernhard Reichel

Isabel Gavela

A method for operating a piezoelectric element is disclosed. A first voltage is applied to a piezoelectric element and produces a first deflection of the piezoelectric element with a travel. An electrical discharge of the piezoelectric element after the application of the first voltage results in a first contraction of the piezoelectric element by a first compression. After the first contraction, a second voltage is applied to the piezoelectric element, whose polarity is opposite that of the first voltage and causes a further contraction of the piezoelectric element by a second compression. Repeated application of the first voltage after the electrical discharge of the applied second voltage results in a deflection of the piezoelectric element with the same travel.

Method for operating a piezoelectric element

A duplexer that includes an input filter (Rx filter), an output filter (Tx filter), and one or more of an isolation line and a delay line is disclosed. The Rx and Tx filters are microwave (MW) resonators and include continuous, internally metallized holes in a ceramic body. The ceramic body includes a metal coating substantially covering the external surfaces of the ceramic body except for an end face and one or more recesses on a bottom side of the ceramic body. An output of the Rx filter on the bottom side of the ceramic body is electrically connected to a balun. The ceramic body has a first height in an area of the Tx filter and a second height in an area of the Rx filter, the second height being less than the first height.

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Deutschlandsberg, Austria

Alenko Lic