Omnidirectional Antenna: Difference between revisions
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* [http://www.qsl.net/g4hbt/dipole.htm Turnstile] Often used for satellite communications. | * [http://www.qsl.net/g4hbt/dipole.htm Turnstile] Often used for satellite communications. | ||
== | == Vertically Polarized Omnidirectional Antennas == | ||
All vertical antennas with a single element are omnidirectional radiators. | All vertical antennas with a single element are omnidirectional radiators. | ||
Latest revision as of 01:45, 26 September 2014
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 |