RadioBanter - View Single Post - Displaced Element Dipole and feed question

John S · February 22nd 15, 11:19 AM posted to rec.radio.amateur.antenna

On 2/21/2015 10:51 AM, wrote:
On Saturday, February 21, 2015 at 10:35:53 AM UTC-6, John S wrote:
Suppose I have a dipole where the two quarter-wave elements are not
exactly aligned. That is, the axis of, say, the left element is
displaced by some amount from the axis of the right element.

Then, what about feeding them from a balanced line?

The questions a

* How will the antenna impedance and current distribution suffer, if at all?

* What feed system is required? 90 degrees to the axis is preferable,
but that means that the twin lead has one side longer than the other.

Is this interesting? Or, has it been discussed before? What was the
outcome, if any?

Thanks, Guys.

I wouldn't feed with one wire of the ladder line longer than
the other. I'd split it at the end long enough to feed both
elements from the middle of the two elements. I don't know
how far apart you are talking about, so couldn't say about
how it would work. You could model it and get a fairly decent
idea I would think. If they are not that far apart, I don't
think it would act much different than any other dipole.
Particularly if you use the spread apart wires of the ladder
line to feed, as those portions of the ladder line will act like
part of the dipole elements.

Why didn't I think of modelling it? Duh!

Thanks.