40.6 Watt, High Power 3.55 GHz Single Crystal XBAW RF Filters for 5G Infrastructure Applications

Previous 4G/LTE applications for RF BAW filters were predominately focused on relatively low power, sub-3 GHz filters for wireless applications. Emerging 5G infrastructure applications bring new requirements for high-power, high-frequency micro RF filters to address coexistence challenges in newly license bands (n77, n78, n79) in the 3.3 to 5 GHz spectrum. This work focuses on the power robustness of 3.5-3.6 GHz XBAW band-pass RF filters constructed using single crystal and poly crystal piezoelectric ("piezo") layers. Superior power handling as well as small-signal performance has been demonstrated.