900 MHz Yagi Antennas
A908NJ-DY, A911NJ-DY
The RadioLinx Directional Yagi Antenna can be used as bridge antennas between two networks or for point-to-point communications. The antennas are field adjustable for vertical or horizontal polarization with matched principal plane beamwidth for optimum performance in either orientation. This design also provides improved front-to-back ratio and sidelobe suppression that reduces interference. All models feature a robust mounting structure for consistent performance regardless of weather conditions.
Typically, Yagi antennas compose an array of linear elements, parallel to on another and attached perpendicular to and along the length of a metal boom. Elements on one side of the feed element are longer and act as reflectors. Elements on the other side of the feed element are shorter and act as directors. The antenna radiates in a beam out the end with the shorter elements. Beamwidth varies (longer length produces a narrower beam).
Caractéristiques Avantages
· Broadband performance covering all 900 MHz frequencies and no tuning required. Provides optimal performance, minimizes inventory requirements, and reduces installation time.
· 360° welds at element and boom interface provide complete protection of the antenna’s internal mechanism against moisture.
· Solid aluminum mounting clamps with stainless steel hardware. Ensures a robust installation and allows the antenna to be mounted for horizontal or vertical polarization.
· End-fed type N female connector. Makes connector accessible for easier installations and protects the electrical connection from moisture and other extreme weather influences.
· Fully enclosed low loss feed system. No exposed gamma match to corrode or deteriorate.
· Black polyester powder-coated finish. Provides an added layer of protection, maximizing performance and durability under the toughest weather conditions.
Spécifications
General Specifications
| Polarization |
Vertical or horizontal |
| Lightning Protection |
DC grounded |
| Nominal Impedance |
50 Ohms |
| Mounting Method |
Mast mounting bracket |
| Termination |
Type N jack |
Matériel
Electrical Specifications
| Model # |
Frequency Range |
Gain |
Front-to-Back Ratio |
| A908NJ-DY |
890 - 960 MHz |
8 dBi |
20 dB |
| A911NJ-DY |
890 - 960 MHz |
11 dBi |
15 dB |
| Model # |
Horizontal Beamwidth @ 1/2 Power |
Vertical Beamwidth @ 1/2 Power |
VSWR |
| A908NJ-DY |
100° |
54° |
< 1.5:1 |
| A911NJ-DY |
52° |
45° |
< 1.5:1 |
Mechanical Specifications
| Model # |
Wind Survival |
Lateral Thrust at Rated Wind |
Equivalent Flat Plate Area |
| A908NJ-DY |
200 mph with no ice and 110 mph with 0.5" radial ice build-up |
7.9 lbs |
0.10 ft² |
| A911NJ-DY |
200 mph with no ice and 110 mph with 0.5" radial ice build-up |
12.6 lbs |
0.16 ft² |
| Model # |
Length |
Weight |
Elements |
| A908NJ-DY |
14 inches |
0.7 lbs |
3 |
| A911NJ-DY |
20.5 inches |
0.9 lbs |
5 |
Téléchargements
| 900 MHz Yagi Antennas Datasheet | 74,95 kB | Dernière Modification 14/12/2009 |