input impedance of AD8342 EVB

Hi, 

The schematic of AD8342 in Figure 61 of datasheet includes R5 = 100 Ohms for resistive input termination. It seems in the actual EVB, this resistor does not exist and without that, S11 is very bigger than -10 dB. Is it true that the input of AD8342 EVB is not matched to 50 Ohms? If so, how should this part be connected to a 50-Ohm matched LNA?

Thanks

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