HF Broadband 3 Folded Dipole Antenna

The term “HF broadband 3-folded (or 3-wire / 3-folded) dipole” typically refers to a broadband (wideband) HF antenna consisting of three parallel conductors (wires) forming a kind of extended folded structure, to increase bandwidth and raise feedpoint impedance (or flatten impedance variation) compared to a simple dipole. Below is a summary of typical / representative specifications and design considerations (with some examples), and then a generic “spec sheet template” for such antennas.

Extending that concept, a 3-wire (or “three-folded”) arrangement further increases the impedance and tends to flatten the impedance variation over frequency. In other words, more wires in parallel help broaden the frequency response and make the feedpoint impedance more stable.