The antennas are usually selected and purchased by the customer.
Manufacturer will provide recommendations for the most suitable types of
antennas based on our experience for a successful and trouble free installation
of the booster if required.
3.2.1 Donor Antenna
3.2.1.1 Donor Antenna Selection
There are many types of antennas on the market, but the following general
characteristics should be met during selecting the donor antenna, we will also
list some of the popular brand for your option in below:
1.
Working frequency
: The donor antenna needs to be compatible with the
booster
’s operating frequency range.
2.
Directivity characteristic:
An antenna with good directivity is
recommended, it is essential for the booster to introduce a clean donor
signal to amplify.
3.
Waterproof
: The donor antenna needs to be waterproof to prevent
rainwater from
affecting the antenna’s characteristics, ultimately affecting
the performance of the booster.
4.
For outdoor booster
, antenna’s front to back ratio must be higher than
20dB to assure excellent isolation on the site.
5.
Recommended donor antennas:
Argus
brand from
Commscope
(www.commscope.com): CNNPX306R-6P (16dBi gain) or
CNNPX308M-4P (17dBi gain). While for a safe working conditions of the
booster, please don’t choose any antennas that over 19dBi gain. There
are also other related items from
Kenbotong
(www.kenbotong.com) or
T
ongyu Communication Inc.
(www.tycc.cn).
3.2.1.1 Donor Antenna Installation
Donor antenna is to be installed at the location where excellent signals from
donor BTS can be received. When installing the donor antenna, the following
conditions need to be considered:
1.
The antenna is recommended to be installed where donor BTS is in line
of sight. The signal level at the BTS port of the booster is recommended
to be in the range from -60dBm to -40dBm with an RxQual index ranging
from 0 to 2. The Rxlev of the primary BCCH is at least 6dB higher than
the BCCH of neighboring BTS sites.