How long is a 75 meter dipole antenna?

The antenna height for all the measurements was about 35 feet, which is a common height for many 75-meter antennas.

How do you calculate the length of a folded dipole antenna?

The starting formula for the folded dipole calculation is the same as a dipole, 468 / Frequency (in MHz). Let’s try an example: Design a folded dipole for the 40 meter band. The frequency that is chosen might be 7.15 MHz. Plugging this in to the formula (468 / 7.15) gives a folded dipole with a length of 65.45 feet.

Should I ground my dipole antenna?

You should ground the shield of the coax before or at the connection point to the balun, not between the balun and antenna. Remember that the balun conversion between the balanced dipole antenna and the unbalanced coax cable.

What angle should a dipole antenna be?

Angle between dipole legs: The angle between the sloping wires must be at least 90° and preferably 120° or more. This angle dictates the centre support height as well as the length of ground needed to accommodate the antenna. Angle between dipole legs should be at least 90° and preferably around 120°.

What direction does a dipole radiate?

When mounted vertically this results in maximum radiation in horizontal directions. When mounted horizontally, the radiation peaks at right angles (90°) to the conductor, with nulls in the direction of the dipole.

Is the folded dipole a good dipole dipole?

False: The folded dipole is only useable with reasonable feed efficiency on the fundamental and on odd harmonics. The folded dipole is much worsethan a regular ladder line fed dipole dipole for harmonic or out-of-band operation. On even harmonic bands, it appears as a nearly dead short.

Can a 125 foot dipole tower work at 160 meters?

Of course, at 160 meters, 125 feet is a quarter wavelength, and such a tower structure is beyond my reach financially. Many people use lower dipoles successfully on 160. I just maintain that at low elevations, a horizontal loop will provide equal and usually better local NVIS performance than a dipole at the same height.

What is the bandwidth of a folded dipole?

The fact the arms also form “stubs”, as with the coaxial dipole, has almost no bearing on bandwidth. The folded dipole is wider bandwidth than thinner dipoles, and narrower than thicker dipoles, when loss is constant. Any bandwidth improvement mostly comes from being thicker, but some actually comes from slightly increased loss.

How long is a foldable dipole antenna?

Plugging this in to the formula (468 / 7.15) gives a folded dipole with a length of 65.45 feet. When I modeled a dipole on the computer at 30 feet, I came up with a length of 65.47 feet. When I added a second wire to make the folded dipole shown above, I designed the antenna with 1 inch spacing between the two wires.