Cylindrical dipole

Image of the Cylindrical dipole.

This antenna forms the basis for a number of other antennas such as the Yagi-Uda and LPDA. In its simplest form, it consists of a two co-linear quarter-wavelength wire sections driven in anti-phase with respect to one another.

An advantage of this antenna over a monopole is that it does not utilise a ground plane. However, the dipole length is twice that of the equivalent monopole, limiting its application at lower frequencies.