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Optibeam Antenna
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Optibeam - OB11-5 - 11 Element 20-17-15-12-10 - 20/17/15/10
OB11-5
New product
As you know the Yagi as a symmetrical structure must always be fed using a balun at the feed point, otherwise the performance will be significantly lost.
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More info
| Bands | 20 / 17 / 15 / 12 / 10 | |
| Gain (dBd) * | 5,3 / 5,5 / 5,6 / 5,6 / 6,7 | |
| Gain (dBi) ** | 12,7 / 13,0 / 13,2 / 13,4 / 14,5 | |
| F/B (dB) | 22 / 22 / 20 / 19 / 19 | |
| VSWR | ||
| 14,00 - 14,19 - 14,35 | 1,3 - 1,0 - 1,2 | |
| 18,07 - 18,14 - 18,17 | 1,3 - 1,1 - 1,2 | |
| 21,00 - 21,25 - 21,45 | 1,5 - 1,1 - 1,5 | |
| 24,89 - 24,93 - 24,99 | 1,2 - 1,1 - 1,3 | |
| 28,00 - 28,50 - 29,00 | 1,5 - 1,1 - 1,5 | |
| Elements (number) | 11 (+ 6 hidden sleeve für 12/17m ) | |
| Active Elements je Band 20 / 17 / 15 / 12 / 10 | 3 / 3 / 3 / 3 / 5 | |
| Max. Elementlength (m) | 11.04 | |
| Boomlength (m) | 6 | |
| Turning Radius (m) | 6.3 | |
| Feedlines (number) | 1 Coax 50 Ohm | |
| Weight (kg) | 45 | |
| Windload at 130 km/h | 1.171 N / 1,47 m² / 15,8 feet² | |
| * = average gain over dipol in free-space / for comparison: 2 el monobander 4 dBd, 3 el 5-6 dBd |
| ** = average gain at 20m above ground (= dBd + 2.15 dB isotropic + about 5 dB ground reflection) |
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