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Filtre BAW 5G

5G-enabled smartphones operate on up to 50 frequency bands. They rely on band pass filters, a passive component that selects the appropriate frequency band within the full RF spectrum.

Published on 26 November 2021


5G BAW Filter: World's first 5 GHz LiNbO3 BAW Solidly Mounted Resonator 

   What's the techno?

5G-enabled smartphones operate on up to 50 frequency bands. They rely on band pass filters, a passive component that selects the appropriate frequency band within the full RF spectrum.

CEA-Leti introduces the world's first BAW-SMR (Bulk Acoustic Waves-Solidly Mounted Resonator), a filter technology based on piezoelectric materials that operates in 5G's frequency band N79 (4500-5000 MHz) using LiNb03, a novel piezoelectric material. 


  Applications :

This BAW-SMR filter technology contributes to developing and enabling: 

  • 5G smartphones
  • Wifi 6GHZ



   What's new?

Currently, 5G smartphones use bulky LTCC filters above 4GHz. This new BAW-SMR filter technology is addressing for the first time filtering frequency bands between 4 to 6 GHz with much smaller components. This help achieve tighter integration.  


  What's next?

This technology has been demonstrated on 100mm wafers using standard semiconductor equipment and processing. CEA-Leti has also demonstrated that LiNbO3 materials can be processed in a CMOS cleanroom facility without cross contaminating other wafers. CEA-Leti team is currently working on 200mm wafers to increase manufacturability and lower production costs. The goal is to enable mass production by 2024. 


  •       FLyer


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