Folded Dipole Attic Antenna

8 66 feet 2 64 meters long.

Folded dipole attic antenna.

The infamous attic dipole. Resonates at 50 4 mhz. Typically the width d of the folded dipole antenna is much smaller than the length l. A folded dipole is a dipole antenna with the ends folded back around and connected to each other forming a loop as shown in figure 1.

The 40 meter dipole was loaded with some coils so that i could fit it in the attic. This was installed at a previous qth i will be the first or millionth remember i m from fl to affirm that the antenna is the determining factor for success when it comes to one s station set up. It gave me 40 20 and 15 with a push because although a 40 meter dipole should give you a resonant 15 meter antenna in this case with the coils for 40 it mucked the maths up and caused the atu some trouble. Folded dipole antenna basics.

The folded dipole antenna or folded dipole aerial is widely used not only on its own but also as the driven element in other antennas like the yagi antenna and various other types of antenna. I decided to install an 40 meter dipole in my attic space which is about 25 by 45 feet and about 25 feet up from the ground. 80 40 meter attic antena i live in a tightly packed urban neighborhood without much room for antennas. Dimensions of the finished antenna you could do without a antenna analyzer if you build your six meter folded dipole antenna system with the following dimensions.

Six meter folded dipole made of 450 ohm ladder line 16 7 strand copper clad steel wire. The better your antenna the more success you will have making contacts. The folded dipole antenna consists of a basic dipole but with an added conductor connecting the two ends together. Need lots of room keep them away from metal objects like heaters and ducts wire antennas can be run near the peak of the roof inside the attic bent in odd shapes to match the space available.

Made from sturdy materials including solid aluminum and a waterproof dipole box this antenna is designed to resist the elements even in a non weatherproofed attic so it can continue to provide your household with free access to tv channels for a long time. Mac af4ps fp 51 note. Hence it is called as half wave folded dipole antenna. Attic antennas many types of antenna can be mounted in the attic if you don t have radiant barrier tech shield.

The length of the dipole is half of the wavelength. I was not very hopefull because the attic has metal wiring and vents and also because it is covered by a slate roof. On 40m it worked a treat. Because the folded dipole forms a closed loop one might expect the input impedance to depend on the input impedance of a.