User Manual

Page

Next Generation

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

Donor antenna of appropriate bandwidth & gain interfaces the BTS on

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.