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.

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