The Sloper Antenna is a slanted

Dipole antenna In radio and telecommunications a dipole antenna or doublet is one of the two simplest and most widely used antenna types, types of antenna; the other is the monopole antenna, monopole. The dipole is any one of a class of antennas producin ...

Advantages

While horizontal dipoles required two large support masts, this antenna type only needs one large mast. It is therefore widely used by

radio amateurs An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service. Amateur radio operators ...

with limited space.Practical Wire Antennas (J. Heys, G3BDQ) In particular for low frequencies this antenna form is interesting. The angle of the slope is usually between 45°–60° and the lower end of the wire is at least wavelength above the electrical

ground Ground may refer to: Geology * Land, the solid terrestrial surface of the Earth * Soil, a mixture of clay, sand and organic matter present on the surface of the Earth Electricity * Ground (electricity), the reference point in an electrical circ ...

. A sloper is typically fed with a

coaxial cable Coaxial cable, or coax (pronounced ), is a type of electrical cable consisting of an inner Electrical conductor, conductor surrounded by a concentric conducting Electromagnetic shielding, shield, with the two separated by a dielectric (Insulat ...

in the center, at the top of the center support mast. At least of the wavelength of

feedline A radio transmitter or receiver is connected to an antenna which emits or receives the radio waves. The antenna feed system or antenna feed is the cable or conductor, and other associated equipment, which connects the transmitter or receiver w ...

must be at 90° angle to the antenna. It is also possible to feed the antenna asymmetrically.Reinprecht, K. OE5RI. Asymmetrisch gespeiste Sloper-Antennen
/ref> Due to the low-angle

radiation pattern In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the ''directional'' (angular) dependence of the strength of the radio waves from the antenna or other source.Constantine A. Balanis: " ...

this antenna has, it performs well for long distance contacts (QSOs) (DX).

References

Radio frequency antenna types Antennas (radio) {{Antenna types , state=expanded