Omnidirectional Antenna

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Horizontally Polarized Omnidirectional Antennas

  • Halo The simplest form - a dipole bent into a circular shape.
  • Big Wheel More elaborate. Mainly used on VHF and UHF.

Circularly Polarized Omnidirectional Antennas

  • Turnstile Often used for satellite communications.

Vertically Polarized Omnidirectional Antennas

All vertical antennas with a single element are omnidirectional radiators.


Antennas
Design Beam * Dipole * Dish or Parabola * DDRR * Log Periodic (LPDA) * Loop * Mobile and portable * Omnidirectional * Panel * Quad and Quagi * Screwdriver * Small tuned loop * Vertical * Yagi-Uda * Wire and random wire antennas
Installation Antenna Tuners * Capacity hats and loading coils * Cavity filters * Coaxial Cable * Feedlines * Rotators * Towers and Masts * VK2ACY - G5RV coupler
Theory Front-to-back ratio * Impedance matching * SWR * Tower design * Vertical Antenna efficiency * Wire comparison tables