On Apr 9, 9:04 am, Cecil Moore wrote:
Richard Fry wrote:
The total average power available at the hybrid output for both of these
conditions is twice that of a single tx without the hybrid.

Does the quote from Born and Wolf support this?

Yes, there is obviously no interference between the
two transmitters if the powers simply add together.
You have doubled the current capability without
doubling the voltage capability - that's not
interference.

For interference to occur, both the E-fields and
the H-fields must be superposed at the same time
such that both fields increase or decrease by the
same percentage. So how do we double the voltage
and double the current in the 50 ohm transmission
line to the antenna?

Except that Richard's description sure seems to meet the
requirements of coherency. Can you offer a way for use
to know whether two signals are coherent?

Secondly, I am at a complete loss to understand how you
can be arguing that when two signals of a particular
power interfere, the result is 4 times the power. This
sure seems like you're getting something from nothing.

What happened to the staunch acceptance of 'conservation of
energy'?

....Keith