Andy asks:
I have a quick question about the number of microwatts that an
antenna will extract from the air and put into a known load.

Assume a 70 ohm perfect antenna used for receiving a signal....

Preceived = Pwr density ( watts/sq mtr) X Capture Area (sq
mtrs)

Is this the power that the 70 ohm antenna will put into a 70
ohm resistor connected to the antenna (as the load), OR is half
this power dissipated in the antenna and the other half sent to
the load ( considering the antenna as a Thevenin generator)....?????

Thanks for any discussion on this. I know it is simple, but I
would like to hear what others have to say about it....

Andy W4OAH