Richard Harrison wrote:
I wrote:
"A circle of 16 ft peroimeter has a diameter of 6.09 ft."

My eyesight needs correction. It should have been 5.09 ft.

The area of a 16-ft circumference circle is 30.37 sq ft, not 20.13 sq
ft.

30.37 sq ft is more than 16 sq ft, so the circle radiates more than the
square for the same length of wire.

With the same power input? If I apply 100 watts to the square and get
(very nearly) 100 watts radiated, how much do I get from the circle?
Let's see, 30.37/16 * 100 = 190 watts. If I could capture that in a
screen room with another antenna, I could feed 100 watts back to the
transmit antenna and have 90 watts left over to run the refrigerator to
cool my beer. . .

Roy Lewallen, W7EL