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## Re: [loopantennas] Loop receive direction

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• ... That depends. For a full size one-wavelength loop, maximum is perpendicular (broadside) to the loop, with no signal in the plane of the loop. For an
Message 1 of 6 , Dec 10 7:26 AM
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> Which is the strongest reception direction of a circular loop...

That depends.

For a full size one-wavelength loop, maximum is perpendicular
(broadside) to the loop, with no signal in the plane of the loop.

For an electrically small loop (much less than a wavelength in
circumference), maximum is in the plane of the loop with no signal
broadside to the loop ... exactly the opposite.

For a loop that is much larger than one wavelength, maximum signal
tends to tilt over *towards* edgewise again, but never reaching it.
For practical large loops, the maximum tends to be somewhere in the
middle between edgewise and broadside.

And of course you have interaction with the ground and other objects nearby.

Andy
• And, that assumes ground wave, as the pattern may be different - at least for small loops - when the arrival angle is well above the horizon. Jack K8ZOA ...
Message 2 of 6 , Dec 10 8:30 AM
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And, that assumes ground wave, as the pattern may be different - at
least for small loops - when the arrival angle is well above the horizon.

Jack K8ZOA

On 12/10/2010 10:26 AM, Andy wrote:
>
> > Which is the strongest reception direction of a circular loop...
>
> That depends.
>
> For a full size one-wavelength loop, maximum is perpendicular
> (broadside) to the loop, with no signal in the plane of the loop.
>
> For an electrically small loop (much less than a wavelength in
> circumference), maximum is in the plane of the loop with no signal
> broadside to the loop ... exactly the opposite.
>
> For a loop that is much larger than one wavelength, maximum signal
> tends to tilt over *towards* edgewise again, but never reaching it.
> For practical large loops, the maximum tends to be somewhere in the
> middle between edgewise and broadside.
>
> And of course you have interaction with the ground and other objects
> nearby.
>
> Andy
>
>

[Non-text portions of this message have been removed]
• That s interesting... My loop will be an untuned but amplified single turn loop of about 2 meters diameter so it looks like edge on to the source will be best
Message 3 of 6 , Dec 10 11:33 AM
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That's interesting...

My loop will be an untuned but amplified single turn loop
of about 2 meters diameter so it looks like edge on to the
source will be best then, given it will be used for HF bands?

--- In loopantennas@yahoogroups.com, Andy <ai.egrps@...> wrote:
>
> > Which is the strongest reception direction of a circular loop...
>
> That depends.
>
> For a full size one-wavelength loop, maximum is perpendicular
> (broadside) to the loop, with no signal in the plane of the loop.
>
> For an electrically small loop (much less than a wavelength in
> circumference), maximum is in the plane of the loop with no signal
> broadside to the loop ... exactly the opposite.
>
> For a loop that is much larger than one wavelength, maximum signal
> tends to tilt over *towards* edgewise again, but never reaching it.
> For practical large loops, the maximum tends to be somewhere in the
> middle between edgewise and broadside.
>
> And of course you have interaction with the ground and other objects nearby.
>
> Andy
>
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