Typical installation is shown in Fig.2 Two antennas are used in this set-up. One antenna
with higher gain (10 dbi typically) and narrow beam, which is called Donor Antenna, is
pointed to the Base Station. It provides down-link signals for the BDA input and directs
up-link signals from the output of BDA to the Base Station.
The second antenna, which is called Service Antenna, usually located on the ceiling of the
service area. Low gain omni-directional antenna is normally used with typical gain 5 dBi
to 2 dBi.
Because antennas are open space radiating structures, the following precautions are
recommended:
Do not make any RF interconnections while BDA is operating
Do not approach Donor Antenna closer than 1 ft when the BDA
is operating. Mark the installation site accordingly.
Service Antenna must be installed sufficiently high in such a
way that the distance between the antenna and the mobile
phone user will always be more than 1 foot.
Do not use antennas with gain above 10 dBi in the service area.
Fig. 2
BS
HH Radio
Donor
Antenna
Closet
BDA
Service
Antenna
