High-Gain Omni Antennas
The antenna shown in Figure B-8 is a high-gain 12-dBi omni antenna from Mobile Mark Antennas. It is designed with no down tilt for use in long-range communication between sites with similar elevations. If the gain is very high, the antenna has a very narrow vertical beam width resulting in poor performance for indoor applications or those installations where there is a height disparity. An example would be an antenna located on top of a high building, which is intended to provide "local" coverage on the ground.
Figure B-8. 12-dBi Omni Antenna
 Table B-6 lists the specification for a typical 12-dBi omni antenna. Note the very narrow vertical beam width.Table B-6. 12-dBi Omni Specifications | Parameter | Specification |
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| Frequency range | 2.42.83 GHz | | VSWR | 2:1 nominal | | Gain | 12 dBi | | Polarization | Vertical | | Azimuth (3-dB BW) | Omnidirectional 360 degrees | | Elevation (3-dB BW) | 7 degrees | | Dimensions | 40" * 1.25" | | Wind rating | 100 mph |
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