Faultless Data Transfer despite Interference – Digitally-Tunable RF Filters

February 19, 2018 by Paul Shepard

With the available frequencies increasingly used up, the communication industry faces some big challenges: Demand is growing for wireless communication systems that work faultlessly even when coexistence and interference problems arise.

The Fraunhofer Institute for Integrated Circuits IIS has developed digitally tunable radio frequency filters (RF filters) that provide dynamic access to a variety of frequencies without any delay. Fraunhofer IIS will be presenting its RF filters at embedded world 2018.

Wireless communication systems are used wherever wired solutions are impractical or when full flexibility is a must. Applications in areas such as satellite communication, public safety and mobile communication employ wireless communication as a matter of course. Wireless technologies are, however, also fast becoming a staple of industry as a way of increasing process connectivity and flexibility.

Whatever the application and context, the devices that send and receive data must function reliably. But with coexistence and interference issues on the rise, we can expect significant constraints and problems when it comes to transferring data.

Fraunhofer IIS has developed digitally tunable radio frequency bandpass filters that make it possible to reliably select the required frequency spectrum while simultaneously rejecting out-of-band signals.

Digital adjustability and the option of reconfiguring filters during operation enable dynamic access to a variety of frequencies without delay. This provides a quick and easy way of making country- and application-specific adjustments.

Compared to conventional filter banks that comprise multiple filters, the solderable RF filters are a space-saving solution, each one measuring just 14 x 15 mm.