Today many Hams encounter big problems when they want to install a good antenna. Many live in an apartment building, or in an area where the rules do not allow you to install a fixed antenna that gives good performance. So many, by necessity, must be satisfied to operate in portable. They therefore need an antenna that is easily transportable, can be installed in a few minutes, and give acceptable performance, well comparable with those of many fixed antennas. Moreover, to operate in Portable allows you to combine our passion with the possibility to take your family to a nice trip, maybe in a nice place, where the children can run in the open air while we Hams can finally find satisfaction in our beloved hobby. Finally, if you could find an antenna that you can use, maybe occasionally, even at home that would be the best: an antenna that you can quickly run from a window to a nearby tree, or another building, or simply to a telescopic pole (there are many made of fiberglass, lightweight and quick to assemble)… …. And then it desappears in a few minutes. This antenna exist: it is the classic "half-wave dipole" powered, however, at one end rather than at the center. The problem that arises is in the adaptation of impedance; at the end of the dipole the voltage is maximum, the current is minimum and the impedance becomes some thousand ohms: not easy to adapt to the 50 ohm required by our Rig, and even if we count on the ATU of our Rig we will have to deal with a very high SWR, strong losses in the cable and probable interference TVI. We have thoroughly studied this issue; we have done hundreds of tests, built dozens of Balun and Unun, and in the end we created our End Fed Monoband Antenna.
Here are some of its features, which make it unique: