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 KJ7YL's Antenna Calculators


Calculate the frequency / length of antennas 



 
 
Frequency in MHz. :
Half Wavelength in Feet :
Half Wavelength in Inches :
Quarter Wavelength Feet:

Quarter Wavelength in Inches:


 

This will calculate the length of a 1 wavelength loop

Freq. in 
Megahertz
length of
loop in feet

This will calculate the length of a half wave dipole.

Freq. in 
Megahertz
length of
half wave length wire 
in feet

This will calculate the length of a 5/8 wave vertical with 1/4 wave radials.

Freq. in 
Megahertz
length of
5/8 wave vertical 
in feet
length of
1/4 wave radials 
in feet

 

This will calculate the length of a delta loop.
This antenna is a triangle shape with L1=top; L2 and L3=sides.
It should be feed with a 4:1 balun.

Freq. in 
Megahertz		 length of
L1 
in feet		 length of
L2 and L3 
in feet

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