The antenna calculation for other frequencies
Amos semicircular antenna can be also used for other frequencies if its physical dimensions are recalculated for the new working frequency according to given dimensions in wave lengths:
Wavelength: Lambda= 299.8 / f(MHz) meters
Overall wire length (in the wavelengths)
L=2.42 (2 pieces)
A=0.320
B=0.574
C=0.543
D=0.158
E=0.180
F=0.032
G=0.081
Wire diameter
d=0.0162
Reflector
H=3.70
I=0.50
Half wave balun length
P= 0.5 * v
v= 0.66 for RG58, RG213, RG8 etc.
v= 0.83 for CFD200
Amos semicircular antenna can be also used for other frequencies if its physical dimensions are recalculated for the new working frequency according to given dimensions in wave lengths:
Wavelength: Lambda= 299.8 / f(MHz) meters
Overall wire length (in the wavelengths)
L=2.42 (2 pieces)
A=0.320
B=0.574
C=0.543
D=0.158
E=0.180
F=0.032
G=0.081
Wire diameter
d=0.0162
Reflector
H=3.70
I=0.50
Half wave balun length
P= 0.5 * v
v= 0.66 for RG58, RG213, RG8 etc.
v= 0.83 for CFD200
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