Kaval BDA1300, Equipment Manual

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BDA1300 Equipment Manual
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Kaval Telecom Inc. Page 2-5 of 51
2.3 BDA “Off-the-Air” Amplifier System Application
The Bi-Directional Amplifier is intended to extend Cellular coverage into areas with coverage
deficiency such as inside office buildings, shopping malls, hospitals etc. It is designed to be
located independent of the donor site and must be equipped with its own antenna systems - one
to communicate with the donor site and the other(s) to communicate with portables in the shadow
zone.
A typical in-building coverage extension system is shown in Figure 1-2. The head-end subsystem,
namely Kaval bi-directional amplifier, is responsible for the amplification of both incoming “off-the-air”
downlink signal and outgoing uplink signals. The in-building distribution antenna system comprises of
Coaxial cable, Signal taps, splitters and antennas to extend coverage on every floor, basement and
underground parking garage.
2.4 BDA “Off-the-Air” Drawing
This distributed antenna system is based on Kaval’s patented “Tapped Radiator” RF signal
distribution approach. The technology makes use of coaxial cable with Signal Taps strategically
located and connected to Omni-directional ground plane antennas. This technology offers
flexibility in system design, installation and optimization. Once the RF cable backbone has been
installed, additional signal taps and antennas can quickly and easily be added to a live system,
without the need to take the system out of service. Hence, new coverage areas can be added, or
the system can easily be modified if the layout should change (e.g. modernization retrofits or
process modifications).