Avago Technologies MGA-81563 - Manual (Page 5)

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for both gain and input return loss for several values of shunt resistor.
Figure 6. Test Results With Shunt Input Resistor.
A shunt resistor value of between 82 and 150 ohms provides a good input
match with minimum loss of gain. The output power is not affected by the
addition of the input shunt resistor.
Summary
Two methods of extending the low frequency response of MGA-81563 and
MGA-82563 RFIC amplifiers have been presented. Of these two choices,
the second method using a shunt R at the input is the simplest to implement
and provides a solution effective to DC. The first method using external
shunt feedback is more complex but may not degrade noise figure as much
as the shunt R technique.
RLM110299
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