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.
Verticallly Polarized Omnidirectional Antennas:
All vertical antennas with a single element are omnidirectional radiators.