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Dipole_folded.php    7109 Bytes    19-06-2024 16:44:37

Folded Dipole Calculator

To be combined with a Yagi Uda Antenna or used as is.

Dipole, folded

Frequency [MHz]


Length units

 mm  inch

Length A


Length Gap

Length B


Radius R

Length C


Rod Diameter

Length D


Total Length

The impedance of this antenna is around 300 Ω, so you may want to use a 4 : 1 transformer or a λ/4 long piece of 150 Ω coaxial cable to match this impedance to 75 Ω. Geometriy is not that critical. If you want to put this thing outdoors, do not use brass, as it gets brittle.


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t1 = 6587 d

t2 = 169 ms

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