The following files contain S-Parameters for the LMH6401 at three gain settings (Max gain, 10dB, and -6 dB).
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/14/LMH6401_5F00_MaxGain_5F00_Vs_3D00_5V.s4phttps://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/14/LMH6401_5F00_Gain_5F00_10dB_5F00_Vs_3D00_5V.s4phttps://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/14/LMH6401_5F00_Gain_5F002D00_6dB_5F00_Vs_3D00_5V.s4p