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Material on this website: copyright 1997-2008. It may be
printed for your personal use but may not be used for commercial purposes,
copied, or altered and posted on other websites
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Array Solutions
350 Gloria Rd.
Sunnyvale,
TX 75182
Phone
(972) 203-2008
Fax
(972) 203-8811
Email Us |
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Multi-Band Government, Military, and Commercial
HF Yagi Antennas by OptiBeam
Multi-Band Commercial Yagis are a
higher gain and lighter weight alternatives to Log Periodics.
 | Higher gain is achieved with shorter boom lengths compared to LPDA
antennas |
| Up to 6 bands may be placed on one antenna boom makes band changes easy |
| Weight is less compared to Log antennas easy to build and deploy in the
field |
| Single Feedline and high reliability direct feed systems means
dependability |
| High power capable 5-10 KW for reliable brutal service |
| Low VSWR within the operating bands keeps losses down and your T/R and
amplifier cool |
These Antennas are designed to your frequency band specifications, we
just need to know
- Frequencies of operation
- Desired Boom Length
- Transmit Power
We will design your antenna for optimum gain, F/B ration, and frequency range
for your boom length.
Contact us directly for details on these high performance Yagis.
Typical Specifications
| Model |
OptiBeam Commercial Multi-Band Yagi |
| Antenna Type |
Yagi-Uda design - OptiBeam Patented Direct Feed
System |
| Frequency Range |
5 to 30 Mhz - split into frequency bands of
choice |
| Usable Range |
approx .3 Mhz per band |
| Gain |
4.5 -9+ dbi free space gain - depends on
number of elements employed |
| Front to Back |
10 to 30 dB - depends of number of elements
employed |
| VSWR |
2:1 Max. typically under 1.4:1 withing the
operating band |
| Feed Impedance |
50 ohms unbalanced - direct feed with Balun |
| Input connector |
Baluns available with SO239, type-N, 7/16 DIN |
| Power |
5 KW, higher power optional |
| Boom Length |
Depends on number of elements |
| Turning Radius |
Depends on boom length and lowest operating
frequency band |
| Wind Area |
Depends on design |
| Wind Survival |
125 MPH |
| Weight |
Depends on design |
As an example here are Specifications of the 5 band Special United
Nations antenna shown in above
picture
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Frequency ranges (MHZ) |
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9.8 / 11.4 / 14.4 / 19.3 / 20.7 |
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Gain (dbd)* |
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Gain (dbi)** |
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F/B (db) |
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SWR
9.745 - 9.845 - 9.945
11.305 - 11.405 - 11.505
14.305 - 14.405 - 14.505
19.213 - 19.313 - 19.413
20.634 - 20.734 - 20.834 28,50 - 29,00 |
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1,5 - 1,1 - 1,4
2,0 - 1,1 - 1,7
1,4 - 1,1 - ..1,2
1,3 - 1,1 - ..1,2
1,3 - 1,1 - ..1,2 |
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Impedance (Ohm) |
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50 |
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Elements |
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10 |
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Active elements |
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2 / 2 / 2 / 2-3 / 2-3 |
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Max. element length (m) |
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15,88 |
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Boom length (m) |
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7,10 |
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Turning radius |
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8,65 |
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Weight (kg) |
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70 |
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Wind load at 130 km/h (m2 / N) |
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2,10 / 1.650 |
* dBd (Decibels over a dipole) Free space
from NEC-4 model
** In DBi (2.15 dB added to dBd) Free Space from NEC-4
model
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