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Electrical data
Radiation at 144.5 MHz
Effective electrical length............................ : 0.375 l
Isotropic gain............................................ : 9.1 dBi
Aperture angle @ -3 dB
- E-plane ........... : 2 x 29.3°
- H-plane ........... : 2 x 43.2°
First side lobe set
- E-plane ........... : None
- H-plane ........... : None
Rear protection......................................... : - 16 dB
Average stray radiation
- E-plane ........... : - 31 dB
- H-plane ........... : - 21 dB
Bandwidth
Gain @ -1 dB........................................... : 142 to 149 MHz
Nominal impedance.................................. : 50 W
Impedance match bandwidth @ SWR<1.3/1 : 143 to 147 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 .. : 0.85 l
- E-plane - Practical distance ... : 1.76 m
- H-plane - Electrical distance .. : 0.85 l
- H-plane - Practical distance ... : 1.76 m
Mechanical data
Connector................................................ : N
Overall length............................................ : 0.93 m
Mass....................................................... : 1.0 kg
Effective wind load
- Horizontal polarisation.. : 0.02 m2
- Vertical polarisation...... : 0.05 m2
Approximate wind load (25m/s - 55 mph)
- Horizontal polarization.. : 0.8 daN
- Vertical polarization..... : 2.4 daN
Approximate wind load (45m/s - 100 mph)
- Horizontal polarization.. : 2.0 daN
- Vertical polarization..... : 6.5 daN |
