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Old November 18th 07, 09:47 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jun 2006
Posts: 395
Default Superposition

Exactly. Misdirection is the primary tool used by magicians (illusionists) to
distract us into thinking something is occurring which really isn't. Its
utility hasn't been lost on those wanting to divert our attention from the
flaws in their arguments.


Anyway, re-thinking on the case being here discussed, we must admit that the
issue could have been readily solved considering the basic antenna theory.

We know that two stacked dipoles yield a gain of up to 3 dB with respect to a
single dipole. In other words, two dipoles each fed with power P/2 produce, in
some regions of the space, a higher field than that produced by a single dipole
fed with power P, although the total transmit power has not changed.

The extra power measured at the receiver is obviously "created" at the expense
of power taken away from other regions of the space (according to the transmit
antenna pattern).

Too fundamental to deserve further discussions!

73

Tony I0JX

 
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