Sloper antenna

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The Sloper Antenna is a slanted Dipole antenna.[1][2] 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.[3] In particular for low frequencies this antenna form is interesting.[4] The angle of the slope is usually between 45°-60° and the lower end of the wire is at least 1/6 wavelength above the electrical ground.[3] The dipole is mostly fed with a coaxial cable in the center. At least 1/4 of the wavelength of feedline must be in 90° angle of the antenna.[3] It is also possible to feed the antenna asymmetrically.[5] Due to the radiation pattern this antenna has a good performance for long distance QSOs (DX).[3]


References

  1. ↑ Novice Antenna Notebook (D. DeMaw, W1FB)
  2. ↑ Rund um die Antenne (M. Rüegger, HB9ACC) http://www.qth.at/oe3dsb/Teil6.pdf
  3. ↑ 3.0 3.1 3.2 3.3 Practical Wire Antennas (J. Heys, G3BDQ)
  4. ↑ The 160-Meter Sloper System at K3LR in The ARRL Antenna Compendium Vol. 4
  5. ↑ Asymmetrisch gespeiste Sloper-Antennen (K. Reinprecht, OE5RI) http://www.oe5.oevsv.at/opencms/technik/antennen_dl/asymmetrisch_gespeiste_sloper.pdf
Antenna types
Isotropic
Omnidirectional
Directional
Application-specific
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