2.
When installing the donor antenna in a relatively high location, lightning
arrestor is necessary. Grounding of the arrestor and the antenna are
essential.
3.
Waterproof of donor antenna’s connector with sealant is highly
recommended.
4.
For outdoor project, the antenna needs to be positioned in an area
between the donor BTS and the coverage area, pointing to the donor
BTS to get an excellent donor signal.
5.
For indoor project, usually the donor antenna is installed against the wall
of the building pointing towards the donor BTS. It should be installed at
least 3 meters above the ground to avoid shadowing when objects pass
in the front of the donor antenna. Also install the donor antenna higher
than the 7
th
floor is not recommended. When the antenna is located in a
high floor, it will be difficult to obtain a signal with good RxQ due to the
interference of signals from various nearby BTSs.
3.2.2 Service Antenna
3.2.2.1 Service Antenna Selection
The service antenna is usually selected and purchased by the customer, we will also
list some of the popular brand for your option in below. It needs to meet the
requirements below:
1. Working frequency
: The service antenna needs to be compatible with the
booster
’s operating frequency range.
2. Half-power Beam width:
Select the antenna with suitable half-power beam
width according to the coverage area.
3.
For outdoor coverage, the service antenna needs to meet two conditions
below: Waterproof and excellent Front-to-back Ratio. The antenna needs
to be waterproof to prevent rainwater from affecting the antenna’s
characteristics, ultimately affecting the performance of the booster. At the
meantime, the front to back ratio needs to be bigger than 20dB to assure
enough isolation of the site.
4.
For indoor coverage, a broadband antenna, which can support the
frequency range of 824~2200MHz, are selected to be compatible to all
systems.
5.
Recommended service antennas:
The maximum gain of the service antenna should no more than
7dBi
. Here
are some of the brand that used for indoor coverage antenna:
Andrew
brand