Coaxial cables are everywhere—inside medical devices, 5G modules, radars, autonomous robots, even the TV on your wall. Yet most people, including many purchasing managers and OEM sourcing teams, only know them as “coax cables” without truly understanding how they work, why different types exist, or how critical cable selection is to signal accuracy, RF stability, and long-term reliability. Engineers know that even a 1 mm change in OD or a mismatched connector can shift impedance enough to break an entire design. That is why companies that rely on performance—medical, military, RF labs, telecom, and precision electronics—care deeply about coaxial structure, shielding, materials, and assembly quality.