Simple choke ring by itself (left) and attached to patch antenna (right). | Download Scientific Diagram
Investigation of a L1-optimized choke ring ground plane for a low-cost GPS receiver-system
More 433 MHz antenna - the 1/2wave Ring Radiator - Blogs - diydrones
Trimble GNSS Choke Ring Antenna | GIM International
The poor man's choke-ring GPS antenna
NovAtel GNSS-750 Wideband Choke Ring Antenna | NavtechGPS
3D Choke Ring Antenna
1: a choke-ring antenna | Download Scientific Diagram
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File:Choke ring antenna Trimble 3305 Enhancer.jpg - Wikimedia Commons