Before revision: A Goubau line or Sommerfeld-Goubau line, or G-line for short, is a single-wire transmission line used to conduct radio waves at UHF and microwave frequencies.
After revision: A Goubau line or Sommerfeld–Goubau line, or G-line for short, is a single-wire transmission line used to conduct radio waves at UHF and microwave frequencies.