User Manual

STTRS DOCUMENTATION
Document Number 80-330501HBKM – Issue A - Draft Page 55 of 500
5.4.7.1. 2 Way Power Splitter/ Combiner 70/30 (05-009905)
The power Splitter/Combiner is a device for accurately matching two or more RF signals to single or
multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and ensuring that the
VSWR, return and insertion losses are kept to a minimum. Any unused ports will be terminated with
an appropriate 50Ω load. Power devices such as these, typically give 10dB better output isolation
than low power equivalents – (important for splitters that feed antenna systems).
05-009905 Specification
Specification Parameter
Frequency Range 764 – 860MHz
Impedence 50
Insertion Loss  ± 0.3dB
VSWR 1.25:1
Splitter 100Watts Maximum
input power
Combiner 5Watts
Power splitting/combining ratio 70% - 30%
RF Connectors N Female
Dimensions 104mm x 63mm x 46mm
operation: -20°C to +60°C Temperature
range
storage: -40°C to +70°C
5.4.7.2. Wideband Asymmetric Coupler (07-015102)
The purpose of Wideband Asymmetric Coupler (07-015102) is to tap off a known portion (in this case
10dB) of RF signal from transmission lines and to combine them, for example through splitter units for
different purposes (alarms/monitoring etc.), whilst maintaining an accurate 50Ω load to all
ports/interfaces throughout the specified frequency range. They are known formally as directional
couplers as they couple power from the RF mainline in one direction only.
07-015102 Specification
PARAMETER SPECIFICATION
Frequency Range 800 - 2500 MHz
Coupling Value 10 dB ± 1.0 dB
Main Line Insertion Loss <1.6 dB
VSWR 1.4:1
Directivity >18 dB
Power Rating 200 Watts
RF Connectors ‘N’ female
operation
-20°C to +60°C
Temperature
range
storage
-40°C to +70°C