Tonna F9FT - Electrical Data; Stacking; Mechanical Data

1290 - 1300 MHz 23 ELEMENT FSFT ANTENNA
Part #: 20623 ("DX")
ELECTRICAL DATA:
Effective electrical length: 7.43 wavelengths
Isotropic gain: 16.0 dB
Aperture angle at -3 dB: E plane: 2 x 10.1 degrees
H plane: 2 x 10.3 degrees
First side lobe set: E plane: -10.6 dB at 27 degrees
H plane: -9.3 dB at 27 degrees
Back to front ratio: =21.1 dB
Average diffuse radiation: E plane: i391, dB
H plane: =20) dB
NOTE: All above data are given for a frequency of 1296.0 MHz.
Bandwitdh at -1 dB: 1246.4 thru 1324.2 MHz
Impedance: 50 Ohm
SVR (1290 thru 1300 MHz): better than 1.25/1
Maximum acceptable RF power: 300 Watts
STACKING:
Spacings for two antennas (element center to element center, at 1296.0 MHz):
Best gain increase (+2.8 to +3.0 dB):
E plane: 3.19 wavelengths (0.74 m, 29" )
H plane: 2.54 wavelengths (0.66 mr 25" 3/4)
Best side lobe compromise (-0.16 dB from optimum in E plane):
E & H plane: 2.84 wavelengths (0.66 m, 25" 3/4)
MECHANICAL DATA:
Length: 1.75 meters (5’ 8" 7/8)
Weight: 4 kilogrammes (3 lbs)
Approximate wind load:
25 m/s ( 90 km/h,» 55 mph): horizontal polarization : 2.3 daN
vertical polarization : 2.0 daN
45 a/s (160 km/h» 100 mph): horizontal polarization : 7.6 dan
vertical polarization : 6.3 daN
Note: 1 daN (decanewton) = 1.02 kgf = 2.25 pound-force.