where is the center of radiation on this antenna ?
where will the strongest field strength be ?

i found this antenna page ,
can i use a coil for the use od decoupling the signal?

http://www.packetradio.com/images/6mdipole.gif

g subs inscribed:

i found this antenna page ,
can i use a coil for the use od decoupling the signal?

http://www.packetradio.com/images/6mdipole.gif

Yes. However you should investigate other matching methods - Google for the
"Ross Dipole". Also look at Gamma matches and Delta matches - both are
viable solutions for unbalanced feeder connection to a balanced antenna
(like a dipole).

--
BIAS COMMS

Everything gets easier with practice, except getting up in the morning!

(g subs) wrote in message . com...
i found this antenna page ,
can i use a coil for the use od decoupling the signal?

http://www.packetradio.com/images/6mdipole.gif


Well, if you look at the picture i posted, you will see
the 4 turns of 4" diameter loops that we placed in the RG-213,
just before the feedpoint.

Your site shows 10 turns of RG-58, which may or may not be
too many turns.

But barrel connectors have a bad reputation for higher losses
that if you used a mounted SO-239. For higher than 300 watts, you
should use a type "N" connector.


Slick

(g subs) wrote in message . com...
where is the center of radiation on this antenna ?
where will the strongest field strength be ?


Looking at:

http://www.drslick.org/Temp1/yagiplot.jpg

You will notice the lobe is greatest at the rear (180), and
this is because of an interesting use of the yagi optimizer program,
where we actually used two directors to act as reflectors.

So the strongest field strength will be where you point the driven
element (dipole), and the weakest ERP will be where the two reflectors are
facing.


Slick