Siemens Aktiengesellschaft

Epcos Ag

Markus Ali-Hackl

Volker Breuer

Frederic Charpentier

Stefan Freisleben

Thomas Baier

Ulrich Bauernschmitt

Ulrike R&ouml;sler

Stefan Fritze

Thomas Johannes

A communication system having a plurality of common channels and includes a primary common control physical channel, a plurality of dedicated channels and a synchronization channel (SCH). The primary common control physical channel and the synchronization channel are transmitted time multiplexed, and the sum transmit power of dedicated channels is reduced during the transmission of the synchronization channel in order to keep the total output power at the base station power amplifier below a maximum power limit.

Power control for a mobile radio communication system

A surface acoustic wave filter having compensated capacitive and inductive crosstalk between adjacent IDT input and output transducers includes electromagnetically coupled transducers split into partial transducers. The routing of the partial transducer pads is modified such that the flux directions of the magnetic couplings between the adjacent partial transducers are oppositely directed so that the total induced magnetic flux is zero. The partial transducers are connected in series or in parallel such that, in the case of symmetric operation, the crosstalk capacitances between adjacent pads and transducer surfaces are balanced at the corresponding port.

Surface acoustic wave filter having balanced crosstalk capacitances in symmetric operation

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Germering, Germany

Markus Ali-Hackl