Re(2): [Antennas] Simple dipole

DavidE Benedict iam at pmug.org
Mon Apr 3 12:35:10 EDT 2006


Yesterday I responded to this as way down below, but semantically it was
not correct. Here's how I should have written it:

Electrical length & physical length can confuse folks...
BUT--Increasing the diameter of a resonant antenna wire (or element)
actually causes the need for it to be a shorter physical length (at any
given resonant frequency), it does not cause a need to lengthen the wire
or element.

Too, in this case of a slightly larger efective diameter, that slightly
larger efective diameter would slightly broaden the bandwidth, which is
typically a good thing for many Ham shacks.

Yes, other things also happen, but these are the two which have the most
effect of all in increasing the diameter of an antenna wire/element.

By the way, there are formulae for these phenomena.

David B.
W7DBH
Oregon

DavidE Benedict


>> be ok to use both conductors as one leg of a dipole or would I be
>> better off to split it and use a single conductor for each side..It
>> is solid copper wire spaced about the same as old flat tv wire but


OK, I don't know where some fellows get the opposite idea, BUT increasing
the diameter of an antenna wire or element actually shortens its
electrical length, not lengthen it.

Too, in this case the larger diameter would also slightly broaden the
bandwidth, which is typically a good thing.

Yes, other things also happen, but these are the two which have the most
effect of all in increasing the diameter of an antenna wire/element.

David B.
W7DBH
Oregon



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