How to Build a 5/8 Wave Dipole Antenna for 11 Meter

Written by nichole liandi
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How to Build a 5/8 Wave Dipole Antenna for 11 Meter
A 5/8 wave dipole antenna is well-suited for CB base station operation. (Hemera Technologies/ Images)

A 5/8 wave dipole antenna consists of two equal lengths of wire, connected to a transmission line in the centre. Each of the wires is equal to 5/8 the length of the frequency's wavelength, which for 11 meter wavelength is 22 feet long. This antenna design offers high-gain in reception and a highly directional radiation pattern. It's well suited for base station applications where the chief interest is receiving and broadcasting over long distances.

Skill level:

Things you need

  • 14-gauge copper wire
  • Wire cutters
  • 3 insulators with holes on each end
  • Coaxial cable with PL-259 connector at one end
  • Soldering iron
  • Rosin-core solder
  • Rope

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  1. 1

    Cut two lengths of 14-gauge bare copper wire with a pair of heavy wire cutters.

  2. 2

    Loop the ends of the wires through the holes in the end of one insulator. Loop 2 inches of wire back upon itself with each wire and twist the wire around itself. You'll now have an insulator with two wires extending out from it.

  3. 3

    Remove 4 inches of insulation from the end of the coaxial cable. Separate the two leads inside the cable and remove 2 inches of insulation. Wrap one lead around each of wires just outside the insulator, and solder them to the copper wire.

  4. 4

    Add an insulator to each end of both copper wires, attaching it in the same manner that was used on the centre insulator.

  5. 5

    Suspend the antenna by looping rope through the insulators on each end of the antenna and suspending the antenna from trees or other objects.

Tips and warnings

  • Be sure to suspend the antenna so the two legs are in line with each other for the best performance.

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