Ready for future communications standards

© Fraunhofer IIS

One of the advantages of the digitally tunable filter is its size. The prototype is roughly the size of a 1 cent coin.

A digitally tunable bandpass filter makes receivers and transmitters more flexible.

The growing heavy use of the available radio spectrum presents major challenges for the communications industry. Wireless communication systems must increasingly be capable of flawlessly recognizing and separating signals. It is also important that they can be adjusted to new communications standards. Digitally tunable bandpass filters are one solution to this and ensure that devices using multiple communications standards can keep pace with the constantly evolving technologies.

With our high-frequency bandpass filter, we have developed a prototype that can meet these requirements. It is suitable for replacing conventional filter banks in high-frequency receivers. The filter module is digitally tunable, which means it is not fixed to one wireless technology. It can move through the entire frequency spectrum and thus does the work of several fixed frequency filters. This saves space and reduces costs. It can also be tuned to new wireless standards, which means it will remain usable in the future.

The filter module reliably selects the required frequency spectrum while suppressing signals outside the chosen band. It can be reconfigured while it is operating so that transmitters and receivers can be adapted to new communications standards and to country-specific or application-specific frequency bands.

This flexibility is beneficial for all systems that use multiple wireless technologies or that will undergo changes in the future. Fields of application include communication in cars, mobile communications, Industry 4.0, and the Internet of Things.

The prototype comes ready-to-solder, and is easy to integrate. We permit customers to adapt and develop the filter, and we also offer tailored licensing models.