Yes, any 1/2wave or 5/8 wave antenna system doubles the horizontal power by
eliminating the power going up. So, it is more like a donut in emission
pattern, whereas the 1/4 antenna is a hemispherical (half a ball) emission pattern.
With satellites, you clearly need to go "up".
As has been said many times, most satellite passes are never "directly
overhead", but rather on some inclination across the sky. A 5 element yagi
antenna, at a 35 degree angle from the horizon, with only an asmuth rotator,
will let you work far more satellites for the money spent.
Gregg Wonderly
On 5/12/2013 12:48 PM, Jeff Moore wrote:
I wouldn't recommend a J-pole for satellite work unless you expect to only work
sats on the horizon. The J-Pole antenna has a low take-off angle and almost NO
radiation overhead, an plain 1/4 wave ground plane antenna would work better
for the sats.
J-poles are great terrestrial communications antennas, not so much for working
overhead satellite passes. An Eggbeater or quadrifiliar antenna would be a
better choice.
7 3
Jeff Moore -- KE7ACY
On 5/12/2013 8:00 AM, Werner, HB9BNK wrote
Thank you all for your valuable hints and advices !
I will now build such an antenna and then supply here the results.
73 Werner, HB9BNK
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_______________________________________________
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