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Stumbled across this article, generally good but with lots of small mistakes.

Choke Ring Antenna is not a generic term, it's specific to GNSS. A choke ring is a standard thing on horn antennas for pattern shaping for all applications.

Omni-directional Antenna is clearly defined in the linked page. This is not Omni-directional, it's directional!

Choke ring antennas are insensitive to multipath because their low-angle radiation is well suppressed. But their main advantage is their stable radiation patterns and phase centre.

The linked page about where it was invented is now defunct. No archive. New reference found for JPL. Also fixed the Trimble link, broken after their site redesign I guess. Added a Leica link.

Thomasonline ( talk) 20:48, 22 January 2024 (UTC) reply