[aprssig] What a diffeence an antenna makes
jdw at eng.uah.edu
Mon Oct 31 11:49:30 CST 2005
On Oct 31, 2005, at 11:43 AM, Stephen H. Smith wrote:
> A half-wave's maximum radiation lobe is straight out toward the
> horizon (perpendicular to the wire) while a quarter wave's maximum
> lobe is about 15-20 degrees above the horizon, actually making it
> better for things that are in the air rather than on the ground.
what does the J-pole radiation pattern look like?
We've been flying roll-up J-poles on balloons recently. They've
performed well, but there is a noticeable null directly under the
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