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Next Generation
Signal Enhancement
Signal Enhancement
6.3. Technical Description of R-20 Repeater
The R-20 Repeater system comprises of high power amplifiers with
automatic power control and highly selective amplification in both the UL &
DL directions. It is incorporated with a Donor antenna (highly directive
outdoor antenna) and Server antenna (indoor omni directional antenna),
specifically designed for interior configurations.
The donor antenna must point towards the cell of the base station from
where the signals are proposed to be picked up and is usually mounted on
the exterior of the building so as to receive the maximum forward signal
level from the base station.
The indoor antenna is specifically designed to blend into the ceiling of a
typical office providing RF signals in all directions downward and outward
from the installation point. For in-building configurations requiring higher
gain or directional RF signal, such as a long hallway or corridor, a medium
gain directional antenna may cover the area best by mounting the antenna
to the opposing wall, where coverage is required.
Main constituents of R20 repeater are described below:
a. DONOR Antenna
automatic power control and highly selective amplification in both the UL &
DL directions. It is incorporated with a Donor antenna (highly directive
outdoor antenna) and Server antenna (indoor omni directional antenna),
specifically designed for interior configurations.
The donor antenna must point towards the cell of the base station from
where the signals are proposed to be picked up and is usually mounted on
the exterior of the building so as to receive the maximum forward signal
level from the base station.
The indoor antenna is specifically designed to blend into the ceiling of a
typical office providing RF signals in all directions downward and outward
from the installation point. For in-building configurations requiring higher
gain or directional RF signal, such as a long hallway or corridor, a medium
gain directional antenna may cover the area best by mounting the antenna
to the opposing wall, where coverage is required.
Main constituents of R20 repeater are described below:
a. DONOR Antenna
Donor antenna of appropriate bandwidth & gain interfaces the BTS on
one side and repeater system on other side through RF cable.
one side and repeater system on other side through RF cable.
Figure 15: Donor Antenna
It intercepts signals from the base station and switch electromagnetic
waves into RF signals in the DL and vice versa in the UL. The antenna
with more than 10-12 dB gain transfers intercepted signals to the
repeater and transmits uplink signals amplified by the repeater.
waves into RF signals in the DL and vice versa in the UL. The antenna
with more than 10-12 dB gain transfers intercepted signals to the
repeater and transmits uplink signals amplified by the repeater.