The TRF0206-SP is configured as an S2D amplifier. The section close to the TRF0206-SP output is an attenuator pad that is meant for robust matching. The section close to AFE7950-SP is the matching network for the AFE that is channel and channel-frequency dependent. The matching components are chosen based on the AFE return-loss data and some trial and error because the manufactured board parameters can influence the exact component values.