Cisco IR829 Hardware Installation Manual page 23

Product Overview
Antennas
Sample Installation
Installation
Users need to provision a 8 x 8" flat mounting surface with a mounting hole on the roof of the vehicle for the 5-in-1 antenna, and a 6 x 6"
flat mounting surface with a mounting hole for the 2-in-1 WiFi antenna. Without a flat mounting surface, the antenna will not meet IP67
standards and may have reduced service life.
Ground plane
Cisco recommends having a 1 foot ground plane under both the 5-in-1 and 2-in-1 antennas. In case of a metal vehicle roof, the roof itself
shall be the ground plane. While Cisco has investigated the effects of ground plane and no ground plane, wireless performance was certified
with the 1 foot ground plane.
Isolation between 5-in-1 and 2-in-1 antennas
Cisco recommends 18" inch spacing between the 5-in-1 and the 2-in-1 antenna centers for optimal isolation.
Cisco recommends routing the 2.4GHz WLAN ports of the IR829 to the 2-in-1 antenna, and the 5GHz ports to the 5-in-1 antenna to optimize
isolation between WiFi 2.4 GHz and cellular 4G LTE. The 5-in-1 antenna has been fully optimized for WiFI and cellular LTE coexistence
and isolation. Connecting the 2.4GHz WiFi signals to a separate antenna simply allows to user to optimize the antenna isolation further.
Both the 5-in-1 and 2-in-1 are dual band WiFi capable and fully support both 2.4 GHz or 5GHz WLAN signals.
MIMO ports on 5-in-1 and 2-in-1
Cellular and WLAN ports on the 5-in-1 and 2-in-1 antennas support MIMO technology. MIMO brings significant improvements in
throughput and robustness of the wireless link in fading channels. Users choosing to connect only one wireless port on MIMO capable
products are giving up significant wireless performance in both throughput and robustness of the link.
 The individual 4G antenna cables on the 5-in-1 antenna can be connected to either cellular port of IR829. There is no one-to-one
assignment requirement.
 The individual WLAN antenna cables on the 5-in-1 antenna and the 2-in-1 antenna can be connected to any WLAN port of IR829.
There is no one to one assignment requirement.
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