Antennes

La formule pour un dipole et verticale
Half-wave antenna in free space 15006/F (см)
Real Half-wave the antenna (up to 30 MHz) 14274/F (см)
Half-wave antenna (from 50 up to 144 MHz) 14030/F (см)
Half-wave antenna (more than 144 MHz) 14233/F (см)
Quarter the wave antenna 7137/F (см)
Length of the wave antenna 30653/F (см)
Enter frequency: (MHz)
Antenne J
Enter frequency
(MHz)
A = (см)
B = (см)
C = (см)
( Rin=50 Ом)
D = (см)

 

 J-ant
" Une Double Quad "
an-fo1

The antenna with an adjustment apron (version А)

Length of the party of each framework = 7564/F (MHz) (см)
Spacing intervals between frameworks A = 3599/F (MHz) (см)

The antenna with a reflector as a selfcontained closed loop (version B)

Length of the party of the vibrator = 7625/F (MHz) (см)
Length of the party of a reflector = 7869/F (MHz) (см)
Spacing intervals between frameworks A = 3599/F (MHz) (см)
Enter frequency: (MHz)
La formule Pour une antenne YAGI
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2 elements YAGI (version А)

Length of the radiator = 14518/F (MHz) (см)
Length of the director = 13725/F (MHz) (см)
Spacing interval between members A = 3660/F (MHz) (см)

3 element YAGI (version B)

Length of the radiator = 14426.5/F (MHz) (см)
Length of a reflector = 15280.5/F (MHz) (см)
Length of the director = 13572.5/F (MHz) (см)
Spacing interval between members A = 7137/F (MHz) (см)
Enter frequency: : (МГц)
The Y-figurative scheme of the coordination of antennas YAGI
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Band, м Length L of a handset of the scheme, см Spacing interval A, см Maximum rating of capacitance of a variable capacitor C, pF
2

10

15

20

40

 16,5

80

120

170

300

 2

10

14

16

22

 18

50

80

150

250

 
In the table the approximate data for the y-figurative scheme of the coordination are adduced. The indicated values are suitable only in that case, when the input resistance of the antenna lies in limits from 15 up to 30 Ohm and the coordination is made with a coaxial cable with a wave drag 50... 70 Ohm.


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