IRT Ku Band BUC Series PicoBUC. Super High Power Density 16W / 20W / 25W. Ku-Band Gan BUC / SSPA. RF Frequency Range-Available in/switched: 14-14.5GHz (Std. Ku-Band), 13.75-14.5GHz (Ext. Ku-Band). LO Switchable Frequency: 13.05 GHz/12.8GHz. See Ordering Part Numbers on Data Sheet.