User Manual

MBF, Multi Band Repeater

PRODUCT DESCRIPTION AND USER'S MANUAL

1.3 Repeater Applications

1.3.1 Channel Selective Repeaters

1.3.1.1 Shadow Coverage and Gap Filling

When there are coverage holes caused by buildings or mountains, a channel selective repeater can be used to

extend coverage into the “dead zone”. The building can sometimes be used as physical shield to create the

necessary antenna isolation.

BTS

Repeater

The terrain is often seen as a limiting factor when striving for flawless radio coverage. The gap-filler

repeaters can be used as a complement to the network of base stations.

1.3.2 Frequency Translating Repeaters

1.3.2.1 Low Traffic Coverage

The example shows coverage extension in an area with low traffic by using frequency translating repeaters.

A two sector BTS is extended with two frequency translating repeaters. Both donor units are mounted at the

base station site and connected to the base station via directional couplers.

Each repeater has a different link frequency and transmits the frequency of the opposite base station sector,

thus minimizing interference or multi-path propagation problems. A normal handover is performed between

the repeater coverage area and the neighboring base station coverage area.

BTS

Donor unit

Remote unit

RF Link Paths

Since the installation of frequency translating repeaters requires moderate antenna isolation, remote site

requirements are very moderate.