5/8 Wave Vertical Antenna Calculator. Post #1029.
5/8 Wave Vertical Antenna Calculator (http://www.qsl.net/w4sat/five8th.htm). Accessed on 01 February 2017, 04:50 hrs, UTC. Author: W4SAT. Please click link or insert title URL into your browser search box to read the full article. Comment: You can design, build, and operate your own 5.8 wavelength vertical antenna by using this simple javascript antenna calculator. An antenna matching device, such a wire-wound coil, must be added between the vertical antenna element and the coaxial cable feedline so that the antenna can match the impedance of the coax feedline. The addition of 3 to 4 quarter wavelength radials will make the antenna more efficient and easier to adjust. As you can guess, the 5/8 wave antenna is a bit more complex to build than the simple ground plane antenna using a 1/4 wavelength vertical element. So, why go to all the trouble of building the 5/8 wavelength vertical antenna? W4SAT gives us several reasons to build this larger vertical antenna: "So