[Elecraft] cobweb antenna
Don Wilhelm
w3fpr at embarqmail.com
Fri May 31 17:14:41 EDT 2013
That is not a reasonable statement at all.
It may be that bringing the ends of the dipole close together will allow
it to be placed close to those objects without the normal de-tuning
effects, but to state that those objects will not absorb radiated power
is a real stretch of the imagination.
73,
Don W3FPR
On 5/31/2013 2:59 PM, Vic K2VCO wrote:
> Theoretically, performance should be similar to a dipole, although
> with a near-omnidirectional pattern (and of course reduced bandwidth).
> It might be perfect for certain antenna-restricted circumstances.
>
> There is a statement on the G3PTW website which is interesting, and I
> would like to hear what others say about this:
>
> "The confined electric near field (caused by the high impedance ends
> of each dipole being close to each other) also ensures that the
> antenna does not couple to other electrical conductors i.e. telephone
> wires, power cables, television antennas or even the ground and lossy
> di-electrics such as trees and buildings. Thus the radiated power is
> not absorbed by nearby objects, it is all radiated into free space.
> Breakthrough and noise pick up are also reduced to an absolute minimum
> and the ground conductivity and height do not affect the antenna tuning."
>
> Does this sound reasonable?
>
> On 5/31/2013 10:46 AM, Yngvi (TF3Y) wrote:
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