Rukus Wireless ZoneFlex 7731 Uživatelský manuál Strana 13

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©2011 Ruckus Wireless, Inc.
Best Practices: Outdoor Bridges |
13
EXTERNAL ANTENNAS
The internal BeamFlex adaptive antenna array supports a 30° 3 dB beamwidth and a
maximum gain of 14 dBi. However, some applications
may require external antennas. Examples of this
include:
Distances longer than 20 km
Higher required throughput
Larger beamwidth
Smaller beamwidth
S
IGNAL GAIN
An increase in signal gain can provide connectivity at longer link distances for the
bridge. Likewise, a higher gain can translate to higher throughput as opposed to the
internal antenna where the external antenna gain is greater than 14 dBi.
When choosing an external antenna, ensure it complies with all local regulatory
requirements and does not exceed maximum allowed transmit power/EIRP.
B
EAMWIDTH
A different antenna beamwidth may be required if:
A higher gain antenna is used (higher gain typically reduces beamwidth)
The environment has too much RF noise: choose a narrower beamwidth to
exclude adjacent or nearby noise
A Point-to-Multipoint configuration requires a larger beamwidth to
accommodate all remote non-root bridges
A
NTENNA HARDWARE
Ruckus Wireless recommends the following antennas:
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