F9FT AFT-20922, 21 elementos 438 MHz ATV/sat

F9FT AFT-20922 21 elementos 438 MHz ATV/sat

• Radiation at 432 MHz: -Effective electrical length: 6.67  -Isotropic gain: 18.2 dBi
  
• Aperture angle @ -3 dB: - E-plane: 2 x 11.5°  - H-plane: 2 x 11.9°
  
• First side lobe set: - E-plane: - 13.8 dB @ 29°  - H-plane: - 12.0 dB @ 30°
  
• Rear protection: - 29.7 dB
  
• Average stray radiation: - E-plane: - 35 dB      - H-plane: - 24 dB
  
• Bandwidth: -Gain @ -1 dB: 417 to 442 MHz
  
• Nominal impedance: 50 Ohm
  
• Impedance match bandwidth @ SWR<1.3/1: 435.0 to 441.0 MHz
  
• Acceptable RF power (continous duty): 1000 W
  
• Array of 2 or 4 antennas: (optimized stacking distance, from center to center of elements, for minimal side lobe radiation)
  - E-plane:  - Electrical distance: 2.36 l
  - E-plane:  - Practical distance: 1.62 m
  - H-plane:  - Electrical distance: 2.36 l
  - H-plane:  - Practical distance: 1.62 m
  
• Connector: N
  
• Overall length: 4.60 m
  
• Mass: 3.1 kg
  
• Effective wind load: - Horizontal polarisation: 0.16 m2 - Vertical polarisation: 0.13 m2
  
• Approximate wind load (25m/s - 55 mph):
  - Horizontal polarization: 6.5 daN
  - Vertical polarization: 5.3 daN
  
• Approximate wind load (45m/s - 100 mph):
  - Horizontal polarization: 21.1 daN
  - Vertical polarization: 17.1 daN