[Antennas] Fluid Motion Antennas

2002年6月27日 13:28:31 EDT

I think George is totally correct.
The antenna design is interesting and we hope you'll keep us informed on how 
it works out.
One comment, there was a chap (a W6-??) back in the 1960's that did something 
similar with his own design. He varied the element lengths all over the place 
and as long as the directors were shorter and the reflector was longer than 
the DE, it was pretty hard to screw the gain up to any degree. The F to B and 
bandwidth / SWR varied quite a bit of course. But the one thing that really 
changed the gain significantly was just adding more boom length. I've done 
the same thing with a FS meter and confirmed his results with changing fixed 
tuned elements. But adding more boom made all the difference.
It would interesting too if the Fluid Motion antenna had a way (probably 
beyond the cost limits) to vary element spacing as well as element length. 
>From what I know of the antenna, you have 3 elements spaced out on a boom 
with no way to move them closer together or farther apart to optimize the 
bands (20M-6M) it covers. If it did, you could then you could really change 
all the parameters.
Brian