Owen Duffy wrote in
:

....
But, you could do things that reduce VSWR and reduce radiated power.
For example, if you insert a 10dB attenuator in the output of your
ATU, you will improve the VSWR, but in most cases, reduce the power
radiated.

I should have written that clearer... you will improve the VSWR seen by the
ATU, ie upstream of the attenuator. Of course, the attenuator does nothing
to the VSWR on the load side of itself.

Owen