2x4 elements Yagi antenna,144 to 146 MHz,
Electrical data
Radiation at 144.5 MHz
Effective electrical length..: 0.375 l
Isotropic gain........ 8.9 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
Required phase delay between frontmost
and rearmost driven element....................... : 72°
Array of 2 or 4 antennas
(optimized stacking distance, from center to
center of elements, for minimal side lobe
radiation)
Electrical distance .. : 0.85 l
Practical distance ... : 1.76 m
Mechanical data
Connector........: N
Overall length....: 1.03 m
Mass.............. 1.2 kg
Effective wind load........: 0.03 m2
Approximate wind load (25m/s - 55 mph)..... : 2.0 daN
Approximate wind load (45m/s - 100 mph)... : 6.5 daN
144/146 MHz antennas
antenna 20808
