Satellite defense

I vaguely remember that some US survelliance sats have the ability to
maneuver. Is this sufficient to dodge a hit to kill asat?
Considering that a satellite is probably the same temp as the
background, a tracking device on an asat wouldn't be IR but would be
radar. How easy is it to radically reduce the radar cross section of
future sats considering the need for the antennae etc.
A radar decoy should be easy to put on sats that could be deployed
when it was attacked and then reeled back in for further use.
If we want to protect existing expensive sats, perhaps the use of small
cheaper sats that will be flown to nearby an existing sat that could
deploy a radar reflector when needed would help.
Is Oberg's discussion of the inverse power law for radar really a
limitation for an attack on high flying sats? Wouldn't the initial
target acquisition be done by high power ground based radar and then
final guidance switched over to the kill veh when it gets within range?
Low inclination sats approach China and Taiwan from the west, does this
mean that ship mounted anti-missile systems would be useless for
defending these sats from an attack?
An active sat defense wouldn't suffer from the fourth power radar
problem since it would only need to detect the asat on board radar so
it could respond before the asat got a last fix. Any thoughts on such
active defense?

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