EV-RADAR -MMIC2 adf 5904 if signal power is too small where is the rx gain

Hi there,

I use EV-RADAR -MMIC2.when the 5904 rf input signal power is  -10dbm,the 5904 output if signal power is about 6dbm,but  the signal  power is about -40  i want to konw why 

 thank you