F9FT AFT-20822, 11+11 elementos, 145 MHz

F9FT AFT-20822 11+11 elementos 145 MHz

• Radiation at 144.5 MHz:
  
• Effective electrical length: 2.20 
  
• Isotropic gain: 14.0 dBi
  
• Aperture angle @ -3 dB: - E-plane: 2 x 18.3°  - H-plane: 2 x 20.3°
  
• First side lobe set: - E-plane: - 18 dB @ 50°  - H-plane: - 12.5 dB @ 50°
  
• Rear protection: - 18.5 dB
  
• Average stray radiation: - E-plane: - 36 dB  - H-plane: - 24 dB
  
• Bandwidth:
  Gain @ -1 dB: 140 to 148 MHz
  Nominal impedance: 50 Ohm
  Impedance match bandwidth @ SWR<1.3/1: 139.5 to 146.7 MHz
  
• Acceptable RF power (continous duty): 1000 W
  
• Required phase delay between frontmost and rearmost driven element: 59°
  
• Array of 2 or 4 antennas: (optimized stacking distance, from center to center of elements, for minimal side lobe radiation)
  
• Electrical distance: 1.46 l
  
• Practical distance: 3.05 m
  
• Connector: N
  
• Overall length: 4.62 m
  
• Mass: 4.2 kg
  
• Effective wind load: 0.2 m2
  
• Approximate wind load (25m/s - 55 mph): 7.6 daN
  
• Approximate wind load (45m/s - 100 mph): 24.5 daN