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Dipole_folded.php   6785 Bytes    08-04-2015 07:48:33


Folded Dipole Calculator



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 transformer or a λ/4 long piece of 120 Ω coaxial cable to match this impedance to 50 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 = 3913 d

t2 = 372 ms

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