The Sloper Antenna is a slanted
Dipole antenna.
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 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.
A sloper is typically fed with a
coaxial cable in the center, at the top of the center support mast. At least of the wavelength of
feedline
In a radio antenna (radio), antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or Radio receiver, receiver. In a transmitting antenna, it feeds the radio ...
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: “A ...
this antenna has, it performs well for long distance contacts (QSOs) (DX).
References
Radio frequency antenna types
Antennas (radio)
{{Antenna types , state=expanded