Antena Folded Dipole 40m Band

Basic half wave dipole antenna.

Antena folded dipole 40m band. The folded dipole is claimed to offer increased bandwidth and to closely match 300 ohm line. In other words a greater portion of the band is available at less than 1 5 1 swr than with a single wire dipole. This is much like the double bazooka antenna or coaxial dipole antenna. The diagram above gives the basic format for the antenna but in reality the antenna will need to be erected between two supports.

Sure enough many approaches both old and new exist to help an 80 or 75m dipole present a decent swr across the entire 80m band. If you are interested in working low band dx and back yard space is scarce this is antenna well worth consideration. The garden here at pzt towers is 50ftx20ft so a full length flat top dipole doublet to get me onto 7mhz was out of the question. 40m standard half wave dipole antenna 2nd hf antenna project my 40m coaxial dipole antenna worked surprisingly well considering how many compromises it was dealing with.

The diagram above shows a typical installation for a ham band dipole antenna. Diy 40m band wave dipole antenna for working around 7 15 mhz. 80m wideband dipole antenna requirements. Using an antenna analyser a low swr was seen at 7 10mhz and 20 10mhz other bands would also be fine with the use of an antenna tuner.

Resources listed under 40m dipole antenna category belongs to 40m main collection and get reviewed and rated by amateur radio operators. Given time many approaches in the antenna book would be well worth a try. Inaccurate double bazooka and coaxial dipole claims have been debunked in numerous forums and texts including in qst and reflections by walter maxwell. However it s performance was best on the higher bands and on 40m never achieved a reasonable swr without an atu to help.

Dipole antenna projects for the 40 meter band category is a curation of 43 web resources on w5vms shorty 40 antenna the 40 meter inverted v antenna 40 meter cage dipole. Some tuning was needed the extra lengths i added during construction had to be trimmed off. While reading back on the folded dipole vs the single wire dipole in the arrl antenna handbook i decided to feed my homemade with ladder line to minimize transmission line losses. In my opinion this antenna works very well but not quite as well as the vertical dipole it replaced.

During testing using an ald atu the antenna tuned in to 40m 20m 17m 15m 12m and 10m. However when working long haul dx it was consistently 1 to 2 s units better than my 40m dipole installed at 40 ft. Typical example of an hf band dipole used for amateur radio.