What does the "RG" in RG coaxial cables stand for?

The term "RG" in RG coaxial cables stands for "Radio Grade." This designation originated during the early days of coaxial cable development, specifically for radio frequency applications. RG cables are designed to minimize loss at high frequencies and are suitable for various kinds of communications, including those involving radio and television signals.

The "Radio" aspect of "Radio Grade" emphasizes that these cables were primarily developed for use in the radio frequency domain, where maintaining signal integrity over distance is crucial. The "Grade" indicates the level of performance and specifications that these cables meet, which is vital for ensuring reliable transmission of signals without excessive attenuation or interference.

Thus, recognizing "RG" as "Radio Grade" highlights the cable's primary function and its suitability for specific applications in telecommunications and broadcasting. The other options, while they may sound plausible, do not correlate with the established terminology used in the industry for coaxial cables.