“SGC” in today’s language simply means “small gauge coax”,SGC cable. However, in years past it was used by some engineers in the RF industry to describe “shielded grounded cable”. The acronym is used to describe a range of wire gauges that are of a micro coaxial cable construction. Coaxial cable involves the use of a wire (center conductor) that has either an extruded insulator over it or taped insulator over it (sometimes referred to as a “dialectric” material), a braided wire shield over that insulator and then an outer jacket. Another acronym used to describe the smaller wire gauges of SGC is “MCX” which means “micro-coaxial”. Micro-coaxial cable is usually termed as such when wire gauges are in the 28-44AWG, generally. Wires of that size are about the thickness of a human hair. “Micro-coax” and “small gauge coax” are often used to describe the same coaxial cable or connector.