Very good point. I do not know whether these deep scientific studies were done
at NEAR
FIELD to the antennas or at distances of hundreds of miles away.
The articles / books claim that these yagoi beams have virtually no gain at
all. I wonder
whhow NEC would stack up against their measurements? It's in a boob, or article
so it MUST
be true. I am just left pondering the same as you - trying to decide where ALL
that extra
power is disappearing to...
On 13 Apr 2015 at 7:40, Markku Oksanen wrote:
> On "Low Performance Trap Antennas" : Is it really known what is the cause
> for the apparently very large difference between a correctly designed trap
> beam, say a TH6DXX or similar and one of the not so good performers? Trap
> loss can't be a big part because even relatively low power loss at a given
> trap, say 50 W, will burn the thing very quickly. Assume 3 elements, 6 traps
> that get exposed on a given band and -3dB gain compared to better beam, this
> would be some 1500/2/6 watts, a lot of watts per trap. Even it not this much
> just loss, there would be ample power to melt the insides of the trap.
> MarkkuOH2RA/WW1C
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