Four Filters on a Wrist: Newsonic Semiconductor RF Duplexers in Children's Smartwatch Signal the Acceleration of Domestic Filter Localization

A teardown of the Xiaoxun D9 children’s smartwatch found four RF duplexers from Newsonic Semiconductor.

The device uses N-SAW for B1/B5 and TC-SAW for B3/B8, showing strong band coverage in a very compact product.

The findings suggest a domestic supplier has reached the performance, cost, and miniaturization needed for tight consumer device constraints.

It points to growing credibility for Chinese RF filter makers in smartphones, wearables, and even overseas shipments.