yixiusky wrote on Aug 14th, 2010, 11:23pm:After meausrement, the input and output matching are ok,
but the gain shiift to 1.5GHz.
What do you mean by "
the gain" ?
Do you want to mean "a peak of gain or S21" ?
Show me frequency characteristics of S11, S22 and S21 as LNA.
yixiusky wrote on Aug 14th, 2010, 11:23pm:I could not think the reason.
I think it is due to characteristics of device intrinsic S21.
Show me frequency characteristics of S11, S22 and S21 of intrinsic device.