(horizontally polarised)

The design follows the idea of the so
called
"CobWebb-Antenna" for the high frequent shortwave bands. The basic
concept of this idea appears to be a folded dipole made of
twin-lead which is
then bend in a circle of rectangle. Basically the rectangle seems to be
the simpler option.

The folded dipole itself and the way to calculate it's dimentions is well described in the literature, i.e. Rothammel. The idea is to make this dipole from standart twin-lead used for electrical home installations. The remaining problem: What is the velocity-factor of you twin-lead.... I guess you will have to measure it (should not be a big deal when following one of the many articles on that topic).

The folded dipole itself and the way to calculate it's dimentions is well described in the literature, i.e. Rothammel. The idea is to make this dipole from standart twin-lead used for electrical home installations. The remaining problem: What is the velocity-factor of you twin-lead.... I guess you will have to measure it (should not be a big deal when following one of the many articles on that topic).

Material used: |
2 x 0.75
mm² |

Total length of twin-lead: |
293.2 cm |

Length of one
dipole leg: |
146.6 cm |

Distance feed to short: |
88 cm |

There certainly is some room for optimisations of the dimensions given above... any volunteers?