Richard Clark wrote:
On Tue, 12 Dec 2006 23:45:42 -0500, "Jimmie D"
wrote:

I was thinking this particular antenna would have a lower radiation
angle

is unrelated to:

but I am beginning to think this may be typical of the drooping radial
1/4 wl antena.

Hi Jimmie,

The drooping radials affect match only (classically so). The relation
of the WHOLE antenna to ground is the significant predictor of
radiation angle.

73's
Richard Clark, KB7QHC

Hello Richard,

The quarter-wave ground-plane antenna's vertical radiation pattern
approaches that of a half-wave vertical as the radial droop approaches
90 degrees, while the feedpoint height remains fixed. Whether one views
that as significant is subjective, of course.

73,

Chuck, NT3G

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On Wed, 13 Dec 2006 07:54:54 -0500, chuck wrote:

I was thinking this particular antenna would have a lower radiation
angle

The quarter-wave ground-plane antenna's vertical radiation pattern
approaches that of a half-wave vertical as the radial droop approaches
90 degrees, while the feedpoint height remains fixed. Whether one views
that as significant is subjective, of course.

Hi Chuck,

Lifting a ground plane off the ground, so that drooping the radials
could, in fact, be drooped; this does more to raise the gain, than
drooping the radials (something like four-fold more).

Already having the antenna off the ground, and then drooping the
radials does accomplish a lowering of the angle, and increasing the
gain. However, I would propose drooping is largely practiced more to
pull the match into 50 Ohms from 35 Ohms than for any perceived
benefit in "Gain" (which is perhaps all of half a dB or slightly
more). Changing the height could easily erode that partial dB.

Moral:
Droop the radials for match;
Raise (correctly place) the antenna for gain.

73's
Richard Clark, KB7QHC

Richard Clark wrote:
On Wed, 13 Dec 2006 07:54:54 -0500, chuck wrote:

I was thinking this particular antenna would have a lower radiation
angle

The quarter-wave ground-plane antenna's vertical radiation pattern
approaches that of a half-wave vertical as the radial droop approaches
90 degrees, while the feedpoint height remains fixed. Whether one views
that as significant is subjective, of course.

Hi Chuck,

Lifting a ground plane off the ground, so that drooping the radials
could, in fact, be drooped; this does more to raise the gain, than
drooping the radials (something like four-fold more).

Already having the antenna off the ground, and then drooping the
radials does accomplish a lowering of the angle, and increasing the
gain. However, I would propose drooping is largely practiced more to
pull the match into 50 Ohms from 35 Ohms than for any perceived
benefit in "Gain" (which is perhaps all of half a dB or slightly
more). Changing the height could easily erode that partial dB.

Moral:
Droop the radials for match;
Raise (correctly place) the antenna for gain.

73's
Richard Clark, KB7QHC
Richard, you're slipping. A concise helpful response ? Man. I didn't
see that one coming.

and now back to the "tautological vomitorium"

John
AB8O