Formula for monopole antenna?
Score: 5/5 (3 votes) Use the formula: Length (feet) = 234 / Frequency(MHz). For example, if you intend to operate on 27.5 Megahertz: (in the CB-Radio Citizens Band) 234 / 27.5 = 8.5 feet (rounded to nearest 0.1 foot). Your 27.5 MHz quarter wavelength wire monopole CB antenna needs to be 8.5 feet in ...