Dave

Have you considered making a coaxial version of the J-pole?

http://www.ansoft.com/news/articles/04.05_MWJ.pdf

Jerry





"David" wrote in message
...
Cecil,

Thanks for the info. The open stub J looks like it should be suitable for
my application being ground independent, omni directional and having low
radiation angle.

Cecil Moore wrote:

David wrote:

Does anyone know of where I could find an example of a homebrew open
stub
fed j antenna. I want to construct a unit for 915 MHz using SMA plug and
coaxial cable.


An open stub J-pole is the same as a Zepp. 1/2WL element
end fed by 1/4WL balanced series section. The coax connects
to the end of the series section. Arrow Antenna makes one
for 2m. Plans are available that could possibly be scaled
to 915 MHz.