Bill Turner wrote:

On Wed, 07 Apr 2004 17:42:58 GMT, Richard Clark
wrote:


There is no gain in any antenna.


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Wow! Wait till the engineering world hears about this!

--
Bill, W6WRT
QSLs via LoTW

If it is a passive device, which it is, there is no gain.

There is vector addition and subtraction of EXH fields to form a beam.
That's math!!

However, I don't know of any Yagi, Quad, 4-square, that with 100 watts
into the antenna and 100 watts radiated, assuming 100% efficiency, has
any gain!! It has directivity!!

Now, my Ameritron 80B takes 65 watts in and delivers 900 watts out.
That's gain! It converts 1400 watts plate power to 900 watts rf [key
down conditions].