Homebrew Multiband Fan Dipole Antenna

Build an hf ham radio dipole antenna it is easy to build construct and erect a dipole antenna for the hf bands.

Homebrew multiband fan dipole antenna.

In the case of my 40 15 fan dipole you need 30 degree angle separation to get good performance. Each dipole should be cut for the approximate centers of the bands where you would like it to resonate. 5 wires parallel for each band fed by a balun at the common center. These are going to be the two halves of your dipole antenna.

These dipoles are used for many radio communications applications and can provide a very neat and easy to implement solution for a multi band dipole. Build this multiband fan dipole for all band hf antenna excitement. The swr is less than 1 2 1 all the way across the 15 meter band with independent adjustment for 40 meters. One separate dipole for each band.

I started with 10cm between each dipole. The fan dipole antenna also known as parallel dipole antenna or fanned dipole antenna is a multi band wire antenna tha can be very easy to build. Just make it as long as possible. But the interaction between each element made it also difficult to tune.

In the drawing above it is shown for just four bands 80 thru 10. Simply cut two equal lengths of stranded copper wire. For further information on the 40 and 15 meter multiband antenna please see my other article the 40 and 15 meter dipole a myth exposed. This antenna consist basically of multiple dipole antennas sharing the same coaxial feed line.

The next antenna built was a so called fan dipole antenna. Don t worry about the total length of the antenna. You can also enjoy multiband performance without traps coils fans or other schemes. The highest frequency antenna is at the bottom and cut for 1 longer than the 1 2 wavelength length in feet 1 01 times 468 divided by the frequency in mhz compared to the construction effort of a standard multi band dipole the only difference is the fabrication of a feed.

I figured out that i needed at least 15 cm between each element the more the better. 160 80 40 20 15 10 metres etc using a few simple components at a minimal cost and get great results. Theory and construction of a novel trapless center loaded off center fed cl ocf dipole or windom antenna for the 80 40 30 20 15 and 10m hf amateur radio bands h pole multiband antenna hb9mtn. If you have a longer garden you can move the pig tail join further back the return wire.

You won t be trimming or adding wire to this dipole. The image shown above has the 40m linear loaded wire plus 20m 15m wires the overall length of this aerial is 12m.