View Full Version : How to build a dipole antenna

11-04-2008, 12:48 AM
I added a guide to my site on how to build a dipole antenna.

Thanks to all the help i got from everyone who helped me with this project.

11-04-2008, 05:52 PM
Great write up
This is one item that I still need to do.



07-31-2009, 07:00 PM
I am a newbie and want to be sure I do things right. The two wires that make up your's or any dipole antenna lengths, do they get soldered together on the center connector of the SO-239 or does one go to the center and the other to the ground. I could not tell from your pics.


07-31-2009, 10:59 PM
Hi, Osgoor...

Assuming you're using coax, one side of the dipole goes to the center wire, and this becomes the "TOP" of the antenna. The other side oif goes to the shield (ground) and is the "BOTTOM." In the case of an FM antenna, since most cars have antennas that have a vertical orientation, you want the antenna to also be mounted vertically. That's why there's a top and bottom. Of course, both ends of the dipole have exactly the same length.

Here's an excellent link to a simple, hand-drawn example that also shows how to calculate the length of the antenna wires.



07-31-2009, 11:41 PM
Thanks. I think I have it now

08-01-2009, 12:13 AM
HERE (http://www.kwarc.org/ant-calc.html) is a site that will calculate the lengths of the legs of the dipole for you...........