They can be viewed as a form of folded dipole and have somewhat similar characteristics.

The folded dipole is therefore well matched to 300-ohm balanced transmission lines.

A folded dipole has a central impedance of about 300 ohms.

Not to be confused with the folded dipole.

Therefore the simplest way of feeding a folded dipole antenna is using a 300-ohm ladder line.

A folded dipole uses a 300-ohm balanced feeder line.

Twin-lead also can serve as a convenient material with which to build a simple folded dipole antenna.

The driven elements are folded dipoles which are linked by a length of balanced twin-lead feed line.

A folded dipole is a half-wave dipole with an additional wire connecting its two ends.

The T2FD antenna is a folded dipole.

Another common place one can see dipoles is as antennas for the FM band; these are folded dipoles.

The large or self-resonant loop antenna can be seen as a folded dipole which has been reformed into a circle (or square, etc.).

Moore describes his antenna as "a pulled-open folded dipole" and describes the time when it was developed:

a folded dipole (a better match, since its characteristic impedance in free space is around 300 ohms),

Variations of the dipole include the folded dipole, the half wave antenna, the ground plane antenna, the whip, and the J-pole.

Several different variations of the dipole are also used, such as the folded dipole, short dipole, cage dipole, and bow-tie antenna.

A half-wavelength folded dipole, commonly seen on television antennae, on the other hand, has an impedance four times that of a dipole, that is 288 Ω.

Previous solutions include the Barker Williamson folded dipole, the Australian traveling wave dipole and other designs by Guertler etc.

The 0.5 λ dipole and the 0.5λ folded dipole are commonly taken as having nominal impedances of 75 Ω and 300 Ω respectively.

Compared to the dipole or folded dipole, it transmits less toward the sky or ground, giving it a somewhat higher gain (about 10% higher) in the horizontal direction.

The driven element is typically a λ/2 dipole or folded dipole and is the only member of the structure that is directly excited (electrically connected to the feedline).

A well known variation of the J-pole is the Slim Jim antenna, which is related to the J-pole the way a folded dipole is related to a dipole.

The Tilted Terminated Folded Dipole (T2FD or TTFD) is a general-purpose shortwave antenna developed in the late 1940s by the United States Navy.

The transmitter site was at Casseldon Place on the Melbourne CBD, which provided around 25 km coverage from a 250 Watt FM transmitter through a single folded dipole antenna.

As the frequency or the size are increased, a standing wave starts to develop in the current, and the antenna starts to have some of the characteristics of a folded dipole antenna or a self-resonant loop.