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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 11 May 2023


5G BAW Filter

World’s first 5 GHz LiNbO3 BAW Solidly Mounted Resonator

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 LiNbO3 piezoelectric materials that can adress 5G's high frequency bands such as N79 (4500-5000 MHz).


What's new?


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 as BAW-SMR are much more compact than traditionnal LTCC.


What's next?

This technology has been demonstrated on 100 mm, 150 mm and 200 mm 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. 

150 mm mass production has started and 200 mm is expected by 2024.


Applications


This BAW-SMR filter technology contributes to developing and enabling:
• 5G smartphones
• i 6 GHZ

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